Inspiron Micro Desktop 3000 Series Service Manual Computer Model: Inspiron 3050 Regulatory Model: D12U Regulatory Type: D12U001
Notes, cautions, and warnings NOTE: A NOTE indicates important information that helps you make better use of your computer. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Copyright © 2015 Dell Inc. All rights reserved. This product is protected by U.S. and international copyright and intellectual property laws.
Contents Before working inside your computer.....................................7 Before you begin ...............................................................................................7 Safety instructions..............................................................................................8 Recommended tools......................................................................................... 9 After working inside your computer......................................
Replacing the processor fan................................................... 26 Procedure........................................................................................................ 26 Post-requisites................................................................................................. 26 Removing the processor heat-sink........................................ 27 Prerequisites.....................................................................................................
Replacing the solid-state drive...............................................43 Procedure........................................................................................................ 43 Post-requisites................................................................................................. 43 Removing the hard drive......................................................... 44 Prerequisites....................................................................................................
Post-requisites........................................................................................... 59 Clearing CMOS Settings.................................................................................. 59 Prerequisites...............................................................................................59 Procedure.................................................................................................. 60 Post-requisites.........................................................
Before working inside your computer CAUTION: To avoid damaging the components and cards, handle them by their edges and avoid touching pins and contacts. NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Before you begin 1 Save and close all open files and exit all open applications. 2 Shut down your computer. – Windows 8.1: On the Start screen, click or tap the power icon Shut down. → – Windows 7: Click or tap Start → Shut down.
Safety instructions Use the following safety guidelines to protect your computer from potential damage and ensure your personal safety. WARNING: Before working inside your computer, read the safety information that shipped with your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/ regulatory_compliance. WARNING: Disconnect all power sources before opening the computer cover or panels.
CAUTION: Press and eject any installed card from the media-card reader.
After working inside your computer CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer. 1 Replace all screws and ensure that no stray screws remain inside your computer. 2 Connect any external devices, peripherals, and cables you removed before working on your computer. 3 Replace any media cards, discs, and any other parts that you removed before working on your computer. 4 Connect your computer and all attached devices to their electrical outlets.
Technical overview WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance.
5 memory module 6 brackets (2) System-board components (top view) 1 memory-module slot 3 processor 12 2 processor-fan cable connector (CPU FAN)
System-board components (bottom view) 1 solid-state drive slot (NGF_SSD) 2 CMOS and password reset jumper (CMOS+PW) 3 wireless-card slot (NGF_WLAN) 4 coin-cell battery 5 hard-drive cable connector (SATA_HDD) 6 coin-cell battery cable connector (BATTERY) 13
Removing the base cover WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Procedure CAUTION: Place the computer on a soft and clean surface to avoid scratching the top cover.
2 Remove the screws that secure the base cover to the top-cover assembly. 1 3 screws (4) 2 base cover Hold the base cover and gently loosen it to release the tabs that secure the base cover to the top-cover assembly.
4 16 Lift the base cover off the top-cover assembly.
Replacing the base cover WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance.
Removing the memory module WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Prerequisites Remove the base cover.
2 Slide and remove the memory module from the memory-module slot.
Replacing the memory module WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Procedure 1 20 Align the notch on the memory module with the tab on the memorymodule slot.
2 Slide the memory module firmly into the slot at an angle and gently press the memory module down until it clicks into place. NOTE: If you do not hear the click, remove the memory module and reinstall it.
Post-requisites Replace the base cover.
Removing the processor fan WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Prerequisites Remove the base cover.
2 Lift the brackets off the system board. 1 3 24 screws (4) 2 brackets (2) Remove the screws that secure the processor fan to the system board.
4 Disconnect the processor-fan cable from the system board and lift the processor fan off the system board.
Replacing the processor fan WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Procedure 1 Connect the processor-fan cable to the system board.
Removing the processor heatsink WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink.
2 Lift the processor heat-sink off system board.
Replacing the processor heatsink WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink.
Removing the wireless card WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Prerequisites 1 Remove the base cover.
Procedure 1 Carefully lift the system-board assembly and turn it over. 1 top-cover assembly 3 alignment posts (4) 2 system-board assembly 2 Remove the screw that secures the wireless-card bracket to the wireless card. 3 Slide and lift the wireless-card bracket off the wireless card. 4 Disconnect the antenna cables from the wireless card.
5 32 Slide and remove the wireless card from the wireless-card slot.
Replacing the wireless card WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Procedure CAUTION: To avoid damage to the wireless card, do not place any cables under it.
3 Press the other end of the wireless card down and connect the antenna cables to the wireless card.
5 Align the screw hole on the wireless-card bracket with the screw hole on the wireless card and replace the screw that secures the wireless-card bracket to the wireless card. 1 6 wireless-card bracket 2 screw Turn the system-board assembly over and using the alignment posts, snap the system-board assembly into place. Post-requisites 1 Follow the procedure from step 4 to step 5 in "Replacing the processor fan”. 2 Replace the base cover.
Removing the coin-cell battery WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: Removing the coin-cell battery resets the BIOS setup program’s settings to default.
Procedure 1 2 Carefully lift the system-board assembly and turn it over. 1 top-cover assembly 3 alignment posts (4) 2 system-board assembly Disconnect the coin-cell battery cable from the system board.
3 38 Peel off the coin-cell battery from the system board.
Replacing the coin-cell battery WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Procedure 1 Adhere the coin-cell battery to the system board.
Removing the solid-state drive WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: Solid-state drives are fragile. Exercise care when handling the hard drive.
Procedure 1 2 Carefully lift the system-board assembly and turn it over. 1 top-cover assembly 3 alignment posts (4) 2 system-board assembly Using a plastic scribe, push the securing tab to release the solid-state drive.
3 42 Slide and lift the solid-state drive off the system-board assembly.
Replacing the solid-state drive WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: Solid-state drives are fragile. Exercise care when handling the hard drive.
Removing the hard drive WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: Hard drives are fragile. Exercise care when handling the hard drive.
Procedure 1 Carefully lift the system-board assembly and turn it over. 1 top-cover assembly 3 alignment posts (4) 2 system-board assembly 2 Using your fingertips, gently release the securing tabs on the hard-drive cable. 3 Disconnect the hard-drive cable from the system board. 4 Remove the screws that secure the hard drive to the hard-drive bay.
5 46 Slide and lift the hard-drive assembly off the hard-drive bay.
6 Disconnect the interposer from the hard drive.
Replacing the hard drive WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. CAUTION: Hard drives are fragile. Exercise care when handling the hard drive.
Removing the system board WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. NOTE: Your computer’s Service Tag is stored in the system board.
1 50 system board
Replacing the system board WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. NOTE: Your computer’s Service Tag is stored in the system board.
Removing the top-cover assembly WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Prerequisites 1 Remove the base cover.
4 Lift the top-cover assembly and keep it aside.
Replacing the top-cover assembly WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance.
BIOS setup program Overview CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS setup program. Certain changes can make your computer work incorrectly. NOTE: Before you change BIOS setup program, it is recommended that you write down the BIOS setup program screen information for future reference. Use BIOS setup program to: • Get information about the hardware installed in your computer, such as the amount of RAM, the size of the hard drive, and so on.
Clearing Forgotten Passwords WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/regulatory_compliance. Prerequisites 1 Remove the base cover.
Procedure 1 2 Carefully lift the system-board assembly and turn it over. 1 top-cover assembly 3 alignment posts (4) 2 system-board assembly Locate the CMOS and password reset jumper (CMOS+PW) on the system board. For more information on the location of CMOS and password reset jumper, see “System-board components”.
3 Remove the jumper plug and replace it on the password jumper-pins. 1 jumper plug 3 password jumper-pins 2 CMOS jumper-pins 4 Follow the procedure from step 4 to step 5 in “Replacing the processor fan”. 5 Replace the base cover. 6 Turn on your computer and wait till the operating system is completely loaded. 7 Shut down your computer. 8 Remove the base cover. 9 Follow the procedure from step 1 to step 2 in “Removing the processor fan”.
Post-requisites 1 Follow the procedure from step 4 to step 5 in "Replacing the processor fan”. 2 Replace the base cover. Clearing CMOS Settings WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Before working inside your computer. After working inside your computer, follow the instructions in After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at dell.
Procedure 1 2 Carefully lift the system-board assembly and turn it over. 1 top-cover assembly 3 alignment posts (4) 2 system-board assembly Locate the CMOS and password reset jumper (CMOS+PW) on the system board. NOTE: For more information on the location of CMOS and password reset jumper, see “System-board components”.
3 Remove the jumper plug and replace it on the CMOS jumper-pins. 1 jumper plug 3 password jumper-pins 2 CMOS jumper-pins 4 Follow the procedure from step 4 to step 5 in “Replacing the processor fan”. 5 Replace the base cover. 6 Turn on your computer and wait till the operating system is completely loaded. 7 Shut down your computer. 8 Remove the base cover. 9 Follow the procedure from step 1 to step 2 in “Removing the processor fan”. 10 Replace the jumper plug to its original position.
Post-requisites 1 Follow the procedure from step 4 to step 5 in "Replacing the processor fan”. 2 Replace the base cover.
Flashing the BIOS You may need to flash (update) the BIOS when an update is available or when you replace the system board. To flash the BIOS: 1 Turn on the computer. 2 Go to dell.com/support. 3 Click Product Support, enter the Service Tag of your laptop and click Submit. NOTE: If you do not have the Service Tag, use the auto-detect feature or manually browse for your computer model. 4 Click Drivers & downloads. 5 Scroll down the page and select BIOS from the Category drop-down list.
Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these online self-help resources: Self-Help Information Self-Help Options Accessing Windows Help Windows 8.1—Open the Search charm, type Help and Support in the search box, and press Enter. Windows 7—Click Start → Help and Support. Information about Dell products and services See dell.com.
NOTE: Availability varies by country and product, and some services may not be available in your country. NOTE: If you do not have an active internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog.
