ThinkPad T420 and T420i Hardware Maintenance Manual
Note: Before using this information and the product it supports, be sure to read the general information under Appendix A “Notices” on page 167. Fourth Edition (November 2011) © Copyright Lenovo 2011. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.
Contents About this manual. . . . . . . . . . . iii . . . . . . . . . . . . 41 41 41 41 43 43 45 46 46 46 48 48 23 Chapter 5. Status indicators . . . . . 49 . . 23 23 Chapter 6. Fn key combinations . . . 53 . . 24 24 Chapter 7. FRU replacement notices . . . . . . . . . . . . . . . . 57 . . 25 25 . 25 Chapter 3. General checkout . . . . . 27 Chapter 1. Safety information . . . . . . 1 General safety . . . . . . . . . . . . . . . Electrical safety . . . . . . . . . . . . . .
1160 LCD unit . . . . . . . . . . . . . . . 1170 Fan assembly . . . . . . . . . . . . . 1180 CPU . . . . . . . . . . . . . . . . 1190 Base cover assembly and DC-in connector cable . . . . . . . . . . . . . . . . . . 1200 Magnesium structure frame . . . . . . . 1210 System board and ExpressCard slot assembly . . . . . . . . . . . . . . . . . 1220 mSATA solid state drive . . . . . . . . . 2010 LCD bezel assembly . . . . . . . . . . 2020 LED board . . . . . . . . . . . . . . 2030 Integrated camera . . . . . .
About this manual This manual contains service and reference information for the following ThinkPad® products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
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Chapter 1. Safety information This chapter presents following safety information that you need to be familiar with before you service a ThinkPad Notebook.
Electrical safety Observe the following rules when working on electrical equipment. Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.
– Use caution; do not become a victim yourself. – Switch off power. – Send another person to get medical aid. Safety inspection guide The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service technicians from injury. This guide addresses only those items.
Notes: 1. Use product-specific ESD procedures when they exceed the requirements noted here. 2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective. When handling ESD-sensitive parts: • Keep the parts in protective packages until they are inserted into the product. • Avoid contact with other people. • Wear a grounded wrist strap against your skin to eliminate static on your body. • Prevent the part from touching your clothing.
Safety notices (multilingual translations) The safety notices in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese DANGER Before the computer is powered on after FRU replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds.
DANGER If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affected areas with water for at least 15 minutes. Seek medical care if any symptoms from the fluid are present after washing. DANGER To avoid shock, do not remove the plastic cover that protects the lower part of the inverter card. DANGER Though the main batteries have low voltage, a shorted or grounded battery can produce enough current to burn personnel or combustible materials.
PERIGO Chapter 1.
Antes de ligar o computador após a substituição da FRU, certifique-se de que todos os parafusos, molas e outras peças pequenas estejam no lugar e não estejam soltos dentro do computador. Verifique isso sacudindo o computador e procurando ouvir sons de peças soltas. Peças metálicas ou lascas de metal podem causar curto-circuito. PERIGO Algumas baterias reserva contêm uma pequena quantidade de níquel e cádmio.
Embora as principais baterias possuam baixa voltagem, uma bateria em curto-circuito ou aterrada pode produzir corrente o bastante para queimar materiais de pessoal ou inflamáveis. PERIGO A menos que uma hot swap seja permitida para a FRU que está sendo substituída, faça o seguinte antes de removê-la: desligue o computador, desconecte todos os cabos de energia das tomadas, remova o pacote de baterias e desconecte quaisquer cabos de interconexão.
DANGER Si le panneau d'affichage à cristaux liquides se brise et que vous recevez dans les yeux ou sur les mains une partie du fluide, rincez-les abondamment pendant au moins quinze minutes. Consultez un médecin si des symptômes persistent après le lavage. DANGER Afin d'éviter tout risque de choc électrique, ne retirez pas le cache en plastique protégeant la partie inférieure de la carte d'alimentation.
VORSICHT Akkus enthalten geringe Mengen von Nickel. Sie dürfen nicht zerlegt, wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen. VORSICHT Die Systembatterie ist eine Lithiumbatterie.
Wenn ein Austausch der FRU bei laufendem Betrieb nicht erlaubt ist, gehen Sie beim Austausch der FRU wie folgt vor: Schalten Sie den Computer aus, ziehen Sie alle Netzkabel von den Netzsteckdosen ab, entfernen Sie den Akku und ziehen Sie alle miteinander verbundenen Kabel ab.
Chapter 1.
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Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los tornillos, muelles y demás piezas pequeñas se encuentran en su sitio y no se encuentran sueltas dentro del sistema. Compruébelo agitando el sistema y escuchando los posibles ruidos que provocarían. Las piezas metálicas pueden causar cortocircuitos eléctricos. Algunas baterías de reserva contienen una pequeña cantidad de níquel y cadmio. No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite.
Para evitar descargas, no quite la cubierta de plástico que rodea la parte baja de la tarjeta invertida. Aunque las baterías principales tienen un voltaje bajo, una batería cortocircuitada o con contacto a tierra puede producir la corriente suficiente como para quemar material combustible o provocar quemaduras en el personal.
Laser compliance statement (multilingual translations) The laser compliance statements in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese Chapter 1.
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Chapter 1.
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Chapter 1.
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Chapter 2.
Attention: The drive startup sequence in the computer you are servicing may have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten. If your computer is shipped with an mSATA drive and a solid state drive or hard disk drive, the mSATA drive will be seen as hard disk 0 in the system, and assigned drive C:.
Strategy for replacing FRUs for CTO, CMV, and GAV Product definition Dynamic Configure To Order (CTO) This provides the ability for a customer to configure a Lenovo solution from an eSite, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label, Product Entitlement Warehouse (PEW), eSupport, and the HMM will load these products as the 4-digit MT and 3-digit model, where model = “CTO” (Example: 1829-CTO).
• eSupport can be used to view the list of key commodities built in a particular machine serial (this is the same record found in PEW). • eSupport can be accessed at the following Web site: http://www.lenovo.com/support • To view the key commodities, do the following: 1. Click Products & Service Warranty. 2. Click Check Warranty Status. 3. On the Warranty Status Lookup page, click Parts Lookup. 4. Type your machine type and serial number, and then click Submit. The key commodities will be displayed.
Chapter 3. General checkout This chapter presents following information: • “What to do first” on page 28 • “Checkout guide” on page 29 – “Diagnostics using PC-Doctor for DOS” on page 29 – “Lenovo ThinkVantage Toolbox” on page 31 – “FRU tests” on page 33 • “Power system checkout” on page 34 The descriptions in this chapter apply to any ThinkPad model that supports the PC-Doctor® for DOS diagnostics program. Some descriptions might not apply to your particular computer.
What to do first When you do return a FRU, you must include the following information in the parts exchange form or parts return form that you attach to it: 1. Name and phone number of service technician 2. Date of service 3. Date on which the machine failed 4. Date of purchase 5. Failure symptoms, error codes appearing on the display, and beep symptoms 6. Procedure index and page number in which the failing FRU was detected 7. Failing FRU name and part number 8.
Checkout guide Use the following procedures as a guide in identifying and correcting problems with the ThinkPad Notebook. Note: The diagnostic tests are intended to test only ThinkPad products. The use of non-ThinkPad products, prototype cards, or modified options can lead to false indications of errors and invalid system responses. 1. Identify the failing symptoms in as much detail as possible. 2. Verify the symptoms.
3. Turn on the computer. If the computer cannot be powered on, go to “Power system checkout” on page 34, and check the power sources. If an error code appears, go to “Symptom-to-FRU index” on page 43. 4. When the ThinkPad logo comes up, immediately press F12 to enter the Boot Menu. 5. Insert the PC-Doctor CD into the optical drive. 6. Press cursor keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter. 7. Follow the instructions on the screen. 8. The main panel of PC-Doctor appears. 9.
11. Follow the instructions on the screen. If there is a problem, PC-Doctor shows messages describing it. 12. To exit the test, select Quit — Exit Diag. To cancel the test, press Esc. Note: After running PC-Doctor, check the time and date on the system and reset them if they are incorrect.
For additional information about this program, see the Help for the program.
FRU tests The following table shows the test for each FRU. Table 1. FRU tests FRU Systemboard Applicable test 1. Diagnostics ➙ CPU/Coprocessor 2. Diagnostics ➙ Systemboard 3. If the docking station or the port replicator is attached to the ThinkPad Notebook, detach it. 4. Place the computer on a horizontal surface, and run Diagnostics ➙ ThinkPad Devices ➙ HDD Active Protection Test. Note: Do not apply any physical shock to the computer while the test is running.
Power system checkout To verify a symptom, do the following: 1. Turn off the computer. 2. Remove the battery pack. 3. Connect the ac power adapter. 4. Check that power is supplied when you turn on the computer. 5. Turn off the computer. 6. Disconnect the ac power adapter and install the charged battery pack. 7. Check that the battery pack supplies power when you turn on the computer.
Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon still does not turn on, replace the battery pack. If the charge indicator still does not turn on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.
Wire Voltage (V dc) Red +2.5 to +3.2 Black Ground • If the voltage is correct, replace the system board. • If the voltage is not correct, replace the backup battery. • If the backup battery discharges quickly after replacement, replace the system board.
Chapter 4. Related service information This chapter presents following information: • “Restoring the factory contents by using Recovery Disc Set” on page 37 • “Passwords” on page 38 • “Power management” on page 41 • “Symptom-to-FRU index” on page 43 Service Web site: When the latest maintenance diskette and the system program service diskette become available, they will be posted on http://www.lenovo.
2. Insert the Operating System Recovery Disc into the DVD drive. 3. Press F10 to save the ThinkPad Setup program configuration changes. Follow the instructions on the screen to begin the recovery process. 4. Select your language and click Next. 5. Read the license. If you agree with the terms and conditions, select I accept these terms and conditions and then click Next. If you do not agree with the terms and conditions, follow the instructions on the screen. 6.
Attention: If the user HDP has been forgotten, check whether a master HDP has been set. If it has, it can be used for access to the hard disk drive. If no master HDP is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master HDP, or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee. For how to remove the POP, see “How to remove the hard-disk password” on page 39.
2. When the ThinkPad logo comes up, immediately press F1 to enter the ThinkPad Setup program. When the POP icon is appearing on the screen, enter the POP. 3. Select Security, using the cursor directional keys to move the menu. 4. Select Password. 5. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens. 6. Select Master HDP. 7. Type the current master HDP in the Enter Current Password field. then leave the Enter New Password field blank, and press Enter twice. 8.
Power management To reduce power consumption, the computer has three power management modes: screen blank, sleep (standby in Windows XP), and hibernation. Screen blank mode If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off. To put the computer into screen blank mode, do as follows: 1. Press Fn+F3. A panel for selecting a power plan (in Windows XP, power scheme) appears. 2.
• The system is powered off. Note: If the computer enters the hibernation mode while it is docked to the docking station, do not undock it before resuming normal operation. If you do undock it and then try to resume normal operation, you will get an error message, and you will have to restart the system. To cause the computer to enter hibernation mode, do any of the following: • Press the Fn+F12 keys.
Symptom-to-FRU index This section contains following information: • “Numeric error codes” on page 43 • “Error messages” on page 45 • “Beep symptoms” on page 46 • “No-beep symptoms” on page 46 • “LCD-related symptoms” on page 46 • “Intermittent problems” on page 48 • “Undetermined problems” on page 48 The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type.
Table 2. Numeric error codes (continued) Symptom or error FRU or action, in sequence 0191 System Security—Invalid Remote Change requested. 1. Run the ThinkPad Setup program, and then save current setting by pressing F10. 2. System board. 0199 System Security— Security password retry count exceeded. 1. Run the ThinkPad Setup program, and then save the current setting by pressing F10. 2. System board. 0251 System CMOS checksum bad— Default configuration used. 1.
Error messages Table 3. Error messages Symptom or error Fan error. FRU or action, in sequence 1. Fan. 2. Thermal grease. 3. System board. Thermal sensing error. System board. This system does not support batteries that are not genuine Lenovo-made or authorized. This system will continue to boot, but may not charge unauthorized batteries. Replace the battery.
Beep symptoms Table 4. Beep symptoms Symptom or error FRU or action, in sequence One beep and a blank, unreadable, or flashing LCD. 1. 2. 3. 4. One long and two short beeps, and a blank or unreadable LCD. 1. System board. 2. LCD assembly. 3. DIMM. Two short beeps with error codes. Two short beeps and a blank screen. Two or more beeps, or a continuous beep. Operating system starts successfully. Three short beeps, pause, three more short beeps, and one short beep. Reseat the LCD connector.
• Lenovo will not provide replacement if the LCD is within specification as we cannot guarantee that any replacement LCD will have zero pixel defects. • One pixel consists of R, G, B sub-pixels. Table 6. LCD-related symptoms Symptom or error FRU or action, in sequence No beep, power-on indicator on, and a blank LCD during POST. System board. • • • • LCD backlight not working. LCD too dark. LCD brightness cannot be adjusted. LCD contrast cannot be adjusted. 1. Reseat the LCD connectors. 2.
Intermittent problems Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a problem recurs. When analyzing an intermittent problem, do the following: 1. Run the diagnostic test for the system board in loop mode at least 10 times. 2. If no error is detected, do not replace any FRUs. 3.
Chapter 5. Status indicators This chapter presents the system status indicators that show the status of the computer.
5 6 11 10 Table 7. Status indicators Indicator 1 Meaning Speaker mute Orange: The speaker is on mute. To set the speakers on mute or unmute, press the speaker mute button. 2 Microphone mute Orange: The microphone is on mute. None of the recording devices is available while the microphone mute is on by default. 3 Wireless LAN, Wireless WAN, or WiMAX status Green: The wireless LAN feature (the IEEE 802.11 b/g standard, 802.11 a/b/g, or 802.
Table 7. Status indicators (continued) Indicator 6 Power on Meaning Green: The computer is on and ready to use. This indicator stays lit around the power-on button whenever the computer is on and is not in sleep (standby) mode. Note: This indicator blinks when the computer is in sleep mode. 7 Numeric lock (On-screen indicator) 8 Serial Ultrabay Enhanced device status By default, when the numeric lock is on, the numeric lock indicator is displayed on the screen.
Table 7. Status indicators (continued) Indicator Meaning The ac power adapter is attached to the computer. The battery status indicator is off: The battery pack of the computer is fully charged or detached. 11 Sleep (standby for Windows XP) status Green: The computer is in sleep (standby) mode. Blinking green: The computer is entering sleep (standby) mode or hibernation mode, or is resuming normal operation.
Chapter 6. Fn key combinations The following table shows the function of each combination of Fn with a function key. Table 8. Fn key combinations Key combination Description Fn+F1 Reserved. Fn+F2 Lock the computer. Fn+F3 Select a power plan (in Windows XP, power scheme) that has been created by Power Manager, or adjust the power level by using the slider control. When you press this combination, a panel for selecting a power plan (power scheme) appears.
Table 8. Fn key combinations (continued) Key combination Description Note: To switch between the computer display and an external monitor, the Win+P key combination is also available. For Windows Vista and Windows XP: Switch between the computer display and an external monitor.
Table 8. Fn key combinations (continued) Key combination Description Fn+PrtSc Have the same function as the SysRq key. Fn+ScrLk Enable or disable the numeric keypad. The indicator of numeric lock will be displayed on the screen. Fn+Pause Have the same function as the Break key. Fn+cursor keys These key combinations work with Windows Media Player.
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Chapter 7. FRU replacement notices This chapter presents notices related to removing and replacing parts. Read this chapter carefully before replacing any FRU. External CRU statement to customers: Some problems with your product can be resolved with a replacement part you can install yourself, called a “Customer Replaceable Unit” or “CRU.” Some CRUs are designated as Self-service CRUs and others are designated as Optional-service CRUs.
• Torque driver If you have a torque driver, refer to the “Torque” column for each step. • Make sure that you use the correct screw. If you have a torque screwdriver, tighten all screws firmly to the torque shown in the table. Never use a screw that you removed. Use a new one. Make sure that all of the screws are tightened firmly. • Ensure torque screw drivers are calibrated correctly following country specifications.
MTM on rear label: TTTT-CTO S/N SSSSSSS Product ID on rear label: TTTT-MMM (Use this number when setting Serial Number) In the example, the Serial Number to be input is “1STTTTMMMSSSSSSS”. Retaining the UUID The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at production and stored in the EEPROM of your system board. The algorithm that generates the number is designed to provide unique IDs until the year A.D. 3400.
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Chapter 8. Removing and replacing a FRU This chapter presents directions and drawings for use in removing and replacing a FRU. External CRU statement to customers: Some problems with your product can be resolved with a replacement part you can install yourself, called a “Customer Replaceable Unit” or “CRU.” Some CRUs are designated as Self-service CRUs and others are designated as Optional-service CRUs.
Before servicing ThinkPad T420 and T420i Some models of the ThinkPad T420 and T420i you are servicing might have the SIM card that the customer has installed. If the computer you are servicing has the SIM card, remove it before you start the servicing. To remove the SIM card, you need to remove the battery pack first. (See “1010 Battery pack” on page 63.) After you finish the servicing, make sure that you insert the card back into the slot firmly.
1010 Battery pack Important notice for replacing a battery pack: Lenovo ThinkVantage Toolbox (in Windows 7) has an automatic battery diagnostic that determines if the battery pack is defective. A battery pack FRU should not be replaced unless this diagnostic shows that the battery is defective. The only exception to this is if the battery pack is physically damaged or a customer is reporting a possible safety issue.
1020 ExpressCard blank bezel Removal steps of ExpressCard blank bezel When you press the ExpressCard blank bezel 1 , it pops out 2 . 1 2 When installing: Make sure that the bezel is correctly oriented as shown in the following figure.
1030 Serial Ultrabay Enhanced device or travel bezel For access, remove this FRU: • “1010 Battery pack” on page 63 Removal steps of Serial Ultrabay Enhanced device or travel bezel Holding the bay lock latch in the unlocked position 1 , slide the bay eject latch in the direction shown by arrow 2 , and then pull out the Serial Ultrabay Enhanced device or the travel bezel in the direction shown by arrow 3 to completely remove it. 1 2 3 Chapter 8.
1040 Hard disk drive (HDD) and solid state drive (SSD) For access, remove this FRU: • “1010 Battery pack” on page 63 Attention: • Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data. • Before removing the drive, have the user make a backup copy of all the information on it if possible. • Never remove the drive while the system is operating or is in suspend mode.
4 3 For HDD and HDD rubber rails (9.5 mm): 4 4 For HDD and HDD rubber rails (7.0mm) : 4 4 For SSD and spacers: 4 4 Chapter 8.
When installing: Make sure that SSD spacers or HDD rubber rails are attached firmly.
1050 DIMM slot cover For access, remove this FRU: • “1010 Battery pack” on page 63 Removal steps of DIMM slot cover Note: Loosen the screw 1 , but do not remove it. 2 Chapter 8.
1060 DIMM (in the slot on the underside of the computer) For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Note: Your computer has two DIMM slots: one under the keyboard and another on the underside of the computer. If you install a DIMM in only one of the two slots, install it in the slot located under the keyboard.
1070 PCI Express Mini Card for wireless WAN For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Removal steps of PCI Express Mini Card for wireless WAN In step 1 , unplug the jacks by using the removal tool antenna RF connector (P/N: 08K7159), or pick the connectors with your fingers and gently unplug them in the direction of the arrow. 1 1 2 Step Screw (quantity) Color Torque 2 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.
3 Note: Plug the yellow cable into the jack labeled MAIN, and the blue cable into the jack labeled AUX on the card. If the computer you are servicing is a wireless WAN-ready model and does not have a wireless WAN card, route the antenna cables and secure them with a tape as shown in the following figure.
1080 Keyboard For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Removal steps of keyboard 1 Step Screw (quantity) Color Torque 1 M2 × 10 mm, wafer-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgfcm) Push down the keyboard a little and slide it toward the arrow 2 to detach the front edge of the keyboard from the frame. 2 Chapter 8.
Lift the keyboard a little in the direction shown by arrow 3 , and then detach the connector 4 . Installation steps of keyboard When installing the keyboard, do the following: 1. Attach the keyboard connector.
2. Attach the keyboard so that the keyboard edges a are under the frame. 3. To make sure that the front edge of the keyboard is housed firmly, gently press the keys with your palms and slightly slide the keyboard toward you until it snaps into position. Chapter 8.
4. Make sure that the front edge of the keyboard b is attached firmly. b b b 5. Secure the keyboard by tightening the screws from the bottom side of the computer.
1090 DIMM (in the slot under the keyboard) For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Note: Your computer has two DIMM slots: one under the keyboard and another on the underside of the computer. If you install a DIMM in only one of the two slots, install it in the slot located under the keyboard. Removal steps of DIMM (in the slot under the keyboard) Chapter 8.
2 1 3 2 When installing: Insert the notched end of the DIMM into the socket. Press the DIMM firmly, and pivot it until it snaps into place. Make sure that it is firmly fixed in the slot and does not move easily.
1100 Backup battery For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Removal steps of backup battery DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. Cable routing: Attach the backup battery and route the cable as shown in the figure below and make sure that the battery connector is attached firmly. Chapter 8.
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1110 PCI Express Mini Card for wireless LAN For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Removal steps of PCI Express Mini Card for wireless LAN In step 1 , unplug the jacks by using the removal tool antenna RF connector (P/N: 08K7159), or pick the connectors with your fingers and gently unplug them in the direction of the arrow. Note: Some models might have only two antenna cables.
3 When installing: • In models with a wireless LAN card that has two antenna connectors, plug the gray cable into the jack marked MAIN or M, and the black cable into the jack marked AUX or A on the card. If the computer you are servicing has three cables, put the white cable in the cable protection tube and secure it with a tape as shown in this figure.
1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Note: The FPC cable is attached on the underside of the keyboard bezel assembly. In some models, the Bluetooth daughter card is also attached on the underside of the keyboard bezel assembly.
Step Screw (quantity) Color Torque 3 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 4 Shoulder screw (2) Silver 0.181 Nm (1.
7 6 When installing: Make sure that the connector is attached firmly. Chapter 8.
17 17 When installing: Make sure that the connectors are attached firmly. 19 18 Step Screw (quantity) Color Torque 13 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.
20 When installing: Make sure that the connector is attached firmly. Chapter 8.
1130 SmartCard For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 Removal steps of SmartCard 1 1 Step Screw (quantity) Color Torque 1 M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.
When installing: Make sure that the connector is attached firmly. Removal steps of SmartCard dummy spacer Some models have a SmartCard dummy spacer as a miscellaneous part. For those models, remove the spacer as shown: 1 1 2 Step Screw (quantity) Color Torque 1 M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) Chapter 8.
1140 Modem daughter card (MDC) For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 Removal steps of modem daughter card (MDC) 1 1 2 Step Screw (quantity) Color Torque 1 M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector is attached firmly.
1150 Speaker assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 Removal steps of speaker assembly 1 1 1 Step Screw (quantity) Color Torque 1 M2 × 3 mm, wafer-head, nylon-coated (3) Black 0.181 Nm (1.85 kgfcm) Chapter 8.
3 2 3 When installing: Attach the speaker assembly and route the cable as shown in the following figure, and make sure that the speaker connector is attached firmly.
1160 LCD unit For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 Removal steps of LCD unit 1 1 Step Screw (quantity) Color Torque 1 M2.
2 3 Step Screw (quantity) Color Torque 2 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.
Step Screw (quantity) Color Torque 6 M2.5 × 6 mm, wafer-head, nylon-coated (2) Black 0.392 Nm (4.0 kgfcm) 8 7 7 7 When installing: • Make sure that you attach the connectors firmly. • Make sure that you route the cables correctly and you tape up in the proper positions as shown in the above figure. • When you route the cables, make sure that they are not subjected to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. Chapter 8.
9 10 10 96 ThinkPad T420 and T420i Hardware Maintenance Manual
1170 Fan assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 • “1150 Speaker assembly” on page 91 • “1160 LCD unit” on page 93 Removal steps of fan assembly Note: Loosen
1a 1d 1c 1b Step Screw (quantity) Color Torque 1 Capture shoulder screw (4) Silver 0.181 Nm (1.85 kgfcm) 2 M2 × 3 mm, wafer-head, nylon-coated (1) black 0.181 Nm (1.
For Integreted Graphics models: 2 3 When installing: • Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the parts marked a as in the following figures. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component. For the fan in the integrated graphics models, you need to peel the thin film off from the thermal rubber marked b .
a • When attaching the fan assembly to the frame, take care not to damage the heat sink a of the fan assembly. • Make sure that the fan connector is attached firmly.
1180 CPU For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 • “1150 Speaker assembly” on page 91 • “1160 LCD unit” on page 93 • “1170 Fan assembly” on page 97 Attention: The CPU
1190 Base cover assembly and DC-in connector cable For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1030 Serial Ultrabay Enhanced device or travel bezel” on page 65 • “1040 Hard disk drive (HDD) and solid state drive (SSD)” on page 66 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel
2 2 2 2 2 2 2 2 3 4 Step Screw (quantity) Color Torque 2 M2 × 5 mm, wafer-head, nylon-coated (8) Black 0.181 Nm (1.85 kgfcm) When installing: Make sure that the connector is attached firmly. 6 5 When installing: Make sure that the wireless switch is adjusted as shown in callout a . Chapter 8.
7 Step Screw (quantity) Color Torque 7 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Note: Applying labels to the base cover The new base cover FRU is shipped with a kit containing labels of several kinds. When you replace the base cover, you need to apply the following label: 17 Homologation label The following labels need to be peeled off from the old base cover, and need to be put on the new base cover.
5 Wireless WAN MAC address label 6 China mobile IMEI label 7 China telecom IMEI label 8 SIRM labels (only for Malaysia) 9 Wireless card label (only for Brazil) 10 Anatel label (only for Brazil) 11 Modem AMOM label (only for Brazil) 12 Bluetooth label (only for Brazil) 13 Israel label (50 mm x 19 mm) 14 No MIC label (only for TAA module assembled in Mexico) 15 Vodafone label 16 FCC label 18 Asset tag 19 Serial number label 20 Product label 21 China wireless WAN label 22 China
1200 Magnesium structure frame For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1030 Serial Ultrabay Enhanced device or travel bezel” on page 65 • “1040 Hard disk drive (HDD) and solid state drive (SSD)” on page 66 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable,
3 M2 × 8 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) 4 Hex stud, nylon-coated (2) Silver 0.392 Nm (4.0 kgfcm) Chapter 8.
1210 System board and ExpressCard slot assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1030 Serial Ultrabay Enhanced device or travel bezel” on page 65 • “1040 Hard disk drive (HDD) and solid state drive (SSD)” on page 66 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel ass
c Platform Controller Hub (PCH) d Graphic Processing Unit (GPU) (Discrete graphics chip) Note: The GPU d is only for models with switchable graphics. Models with integrated graphics do not have a GPU on the system board. For Switchable Graphics models: a d c b For Integrated Graphics models: a c b 1 Chapter 8.
Step Screw (quantity) Color Torque 1 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 2 When installing: Make sure that the connector is attached firmly. 1220 mSATA solid state drive For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Attention: • Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data.
Removal steps of mSATA solid state drive 1 Step Screw (quantity) Color Torque 1 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 2 Chapter 8.
2010 LCD bezel assembly For access, remove the following FRU: • “1010 Battery pack” on page 63 Removal steps of LCD bezel assembly 2 1 1 1 1 1 1 112 ThinkPad T420 and T420i Hardware Maintenance Manual
2020 LED board For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “2010 LCD bezel assembly” on page 112 Removal steps of LED board 1 Step Screw (quantity) Color Torque 1 M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Chapter 8.
When installing: Make sure that the connector is attached firmly.
2030 Integrated camera For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “2010 LCD bezel assembly” on page 112 Removal steps of integrated camera 1 Step Screw (quantity) Color Torque 1 M2 × 3 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Chapter 8.
2 116 ThinkPad T420 and T420i Hardware Maintenance Manual
2040 LCD panel and LCD cable For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 • “1150 Speaker assembly” on page 91 • “1160 LCD unit” on page 93 • “2010 LCD bezel assembly” on p
7 6 When installing: Make sure that the connector is attached firmly.
2050 Camera cable For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 • “1150 Speaker assembly” on page 91 • “1160 LCD unit” on page 93 • “2010 LCD bezel assembly” on page 112 • “
2060 Wireless LAN antenna assembly or wireless LAN/WAN antenna assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 • “1150 Speaker assembly” on page 91 • “1160 LCD unit”
3 3 4 4 Step Screw (quantity) Color Torque 3 M2 × 3 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) 5 5 Chapter 8.
2070 Hinges and LCD rear cover assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 63 • “1020 ExpressCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI Express Mini Card for wireless WAN” on page 71 • “1080 Keyboard” on page 73 • “1110 PCI Express Mini Card for wireless LAN” on page 81 • “1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card” on page 83 • “1150 Speaker assembly” on page 91 • “1160 LCD unit” on page 93 • “2010 LCD bezel ass
Chapter 8.
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Chapter 9. Locations This chapter presents the locations of ThinkPad T420 and T420i hardware components.
3 1 2 21 3 20 19 18 5 16 4 15 5 14 6 17 13 7 10 12 126 ThinkPad T420 and T420i Hardware Maintenance Manual 11 9 8
Rear view 1 Status indicators Note: For the description of each indicator, see Chapter 5 “Status indicators” on page 49. 2 SmartCard slot 3 DisplayPort connector 4 USB connector 5 RJ-45 (Ethernet) connector 6 External monitor connector 7 Power jack 8 USB connector 9 Modem connector or IEEE 1394 1 9 8 2 3 7 6 6 55 4 Chapter 9.
Bottom view 1 Battery pack 2 Battery pack latch 3 DIMM slot 4 Docking connector 5 LCD cover latch 6 Serial Ultrabay Enhanced lock latch 7 Serial Ultrabay Enhanced eject latch 7 6 1 2 3 4 5 128 ThinkPad T420 and T420i Hardware Maintenance Manual
Chapter 10. Parts list This chapter contains following lists of the service parts. • “Overall” on page 130 • “LCD FRUs” on page 150 • “Keyboard” on page 154 • “Miscellaneous parts” on page 156 • “Information about ac power adapters” on page 158 • “Power cords” on page 159 • “Recovery discs” on page 160 • “Common service tools” on page 166 Notes: • Each FRU is available for all types or models, unless specific types or models are specified.
Overall 1 30 29 2 3 4 28 27 a 26 b 5 c 25 24 6 7 23 22 21 8 9 10 20 19 11 12 18 13 17 14 16 3 15 130 ThinkPad T420 and T420i Hardware Maintenance Manual
Table 9. Parts list—Overall No. FRU (Overall) FRU no. CRU ID a-c See “Miscellaneous parts” on page 156. 1 LCD unit (see “LCD FRUs” on page 150.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 17 Integrated China Telecom Mobile Broadband (Huawei EM660) • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 60Y3239 ** — mSATA Solida State Drive • 4177-CTO, Q3x, QAx, QCx • 4178-CTO, 5Ux, 67x, 68x, 6Ax, 9Cx, A8x, A9x, AXx • 4179-CTO • 4180-CTO, M6x, PYx • 4236-CTO • 4237-CTO • 4238-CTO 45N8259 ** 18 HDD rubber rails 41V9756 ** 18 HDD rubber rails (7.0 mm-high HDD rubber rails for 9.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 22 CPU assembly, i7-2620M (2.70 GHz) • 4177-CTO, 2Hx, 2Jx, Q7x, QAx, QBx, QFx • 4178-CTO, 5Xx, 5Yx, 67x, 6Ax, 6Gx, 6Wx, 99x, 9Mx, 9Sx, A4x, AEx, AFx, AWx, AXx, AYx • 4179-CTO, GRx • 4180-CTO, J2x, K8x, KCx, KFx, KMx, KRx, L2x, LAx, LBx, PEx, PJx, PQx, PXx, Q5x, Q6x • 4236-CTO, N4x, NDx, NEx, NFx, NGx, NPx, NQx, NRx, NVx, NWx, P2x, P9x, PEx, PKx • 4237-CTO • 4238-CTO 04W0494 N 22 CPU assembly, i3-2310M (2.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 22 CPU assembly, Intel Pentium B950 (2.10 GHz) • 4177-CTO, GFx, GKx, GLx, GMx • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1895 N 22 CPU assembly, Intel Pentium B940 (2.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no.
Table 9. Parts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID • 4236-CTO, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NWx, NXx, NYx, P2x, P3x, P4x, P5x, P6x, P8x, P9x, PBx, PCx, PDx, PEx, PHx, PJx • 4237-CTO • 4238-CTO 29 Keyboard (see “Keyboard” on page 154.) 30 TrackPoint caps 91P9642 * — Thermal grease 91P8835 N — ac power adapter (see “Information about ac power adapters” on page 158.
LCD FRUs 10 1 2 3 9 8 7 4 5 6 Table 10. Parts list—LCD FRUs No. FRU a, b See “Miscellaneous parts” on page 156. 1 LCD bezel assembly 150 ThinkPad T420 and T420i Hardware Maintenance Manual FRU no.
Table 10. Parts list—LCD FRUs (continued) No. FRU FRU no.
Table 10. Parts list—LCD FRUs (continued) No. FRU FRU no. CRU ID 3 LCD module, 14.
Table 10. Parts list—LCD FRUs (continued) No. FRU FRU no. CRU ID 8 LCD cable (for 14.
Keyboard Table 11. Parts list—Keyboard Language FRU no. Arabic 45N2076 45N2146 45N2216 Belgian 45N2077 45N2147 45N2217 Brazilian Portuguese 45N2075 45N2145 45N2215 Bulgarian 45N2078 45N2148 45N2218 Canadian French (058) 45N2073 45N2143 45N2213 Canadian French (Acnor) 45N2072 45N2142 45N2212 Czech 45N2079 45N2149 45N2219 Danish 45N2080 45N2150 45N2220 Finnish, Swedish 45N2097 45N2167 45N2237 French 45N2082 45N2152 45N2222 German 45N2083 45N2153 45N2223 Greek (U.
Table 11. Parts list—Keyboard (continued) Language FRU no. Netherlands 45N2090 45N2160 45N2230 Turkish (F Type) 60Y9552 60Y9554 60Y9550 CRU ID Chapter 10.
Miscellaneous parts Table 12. Parts list—Miscellaneous parts FRU FRU no. CRU ID Screw and seal kit: • M2 × 3 mm, black (50) • M2 × 5 mm, black (20) • M2 × 8 mm, black (15) • M2 × 10 mm, Silver (4) • M2 × 15 mm, black (8) • M2.5 × 4 mm, black (8) • M2.
Table 12. Parts list—Miscellaneous parts (continued) FRU FRU no. CRU ID System miscellaneous parts: • (a) Express dummy card • (b) LCD connector bracket • (c) Fan bracket, discrete • CPU mylar for 35W SV GT2 • 1394 cover • Dummy cover, RJ-11 • Plastic support for smart card • Blind sheet for SIM card • SIM dummy card Note: Italicized letters in parentheses are references to the exploded view in “Overall” on page 130.
Information about ac power adapters Table 13. Parts list—2-pin ac power adapters FRU FRU no.
Power cords A ThinkPad power cord for a specific country or region is usually available only in that country or region: Table 15. Parts list—2-pin power cords Country or region FRU no. Argentina • models -CTO, xxY 42T5020 42T5105 Brazil • models -CTO, xxP 42T5180 42T5183 Canada, U.S. • models -CTO, xxF, xxL, xxS, xxU 42T5008 42T5093 Japan • models -CTO, xxE, xxJ 42T5014 42T5099 CRU ID * Table 16. Parts list—3-pin power cords Country or region FRU no.
Recovery discs Windows XP Professional DVDs Note: The Windows XP Professional recovery DVDs are available only for models with a valid Microsoft Windows XP Professional certificate of authenticity (COA) affixed to the system.
Windows Vista Home Basic (32 bit) SP2 DVDs Note: The Windows Vista recovery DVDs are available only for models with a valid Microsoft Windows Vista certificate of authenticity (COA) affixed to the system. Due to a Microsoft licensing limitation, if a model came with Windows Vista Business or Windows Vista Ultimate preinstalled from the factory, but has a Windows 7 COA affixed to the system, that model is eligible only for recovery DVDs that match the operating system specified on the COA.
• • • • • • QXx, QYx, R2x, R3x, R4x, R8x, R9x, RAx, RBx, RCx, RDx, RFx, RGx, RJx, RKx, RLx, RMx, RNx, RPx, RQx, RRx, RTx, RVx, RWx, RXx, RYx 4178-CTO, 52x, 53x, 54x, 55x, 56x, 57x, 58x, 59x, 5Ax, 5Bx, 5Cx, 5Dx, 5Ex, 5Fx, 5Gx, 5Hx, 5Kx, 5Mx, 5Px, 5Qx, 5Rx, 5Sx, 5Tx, 5Ux, 5Vx, 5Wx, 5Xx, 5Yx, 5Zx, 66x, 67x, 68x, 6Ax, 6Cx, 6Ex, 6Fx, 6Gx, 6Hx, 6Kx, 6Mx, 6Nx, 6Px, 6Qx, 6Rx, 6Ux, 6Vx, 6Wx, 6Yx, 82x, 83x, 84x, 93x, 96x, 99x, 9Ax, 9Bx, 9Cx, 9Gx, 9Hx, 9Jx, 9Kx, 9Lx, 9Mx, 9Rx, 9Sx, 9Tx, 9Wx, 9Xx, 9Yx, 9Zx, A2x, A3
Table 21. Parts list—Windows 7 Professional (64 bit) recovery DVDs (continued) Language P/N Serbian-Latin with English 04T1342 Simplified Chinese 04T1324 Traditional Chinese with English (Hong Kong S.A.R.
Table 23.
Table 24. Parts list—Windows 7 Home Premium (64 bit) recovery DVDs (continued) Language P/N Turkish with English 04T1384 US English (Disabled) 04T1385 US English 04T1386 CRU ID Windows 7 Ultimate (32 bit) DVDs Windows 7 Ultimate (32 bit) is preinstalled as the operating system in the following models: • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO Table 25.
Common service tools Table 27. Parts list—Common service tools Tool P/N Screwdriver kit 95F3598 1/4" drive spinner handle 1650840 1/4" Sq. to 1/4" hex torx adapter 93F2838 TR7-TR-10 tamper resistant torx bits 00P6967 Removal tool antenna RF connector 08K7159 USB 2.
Appendix A. Notices Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used.
Electronic emissions notices For electronic emission information on Class B digital devices, refer to the corresponding information in the User Guide.
Trademarks The following terms are trademarks of Lenovo in the United States, other countries or both: Active Protection System Lenovo ThinkLight ThinkPad ThinkVantage TrackPoint Ultrabay The following terms are trademarks of Microsoft group of companies: Windows Microsoft The following terms are trademarks of Intel Corporation or its subsidiaries in the United States, other countries, or both: Intel Intel Centrino Intel Core Other company, product, or service names may be the trademarks or service marks of
170 ThinkPad T420 and T420i Hardware Maintenance Manual
Part Number: 0A60007_03 (1P) P/N: 0A60007_03 *0A60007_03*
