Dell™ Dimension™ 5100C Service Manual Before You Begin Technical Overview Specifications Removing the Computer Cover Removing and Installing Parts Replacing the Computer Cover Troubleshooting Tools System Setup Notes, Notices, and Cautions NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
Back to Contents Page Troubleshooting Tools Dell™ Dimension™ 5100C Service Manual Dell Diagnostics System Lights Diagnostic Lights Beep Codes Dell Diagnostics CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. When to Use the Dell Diagnostics If you experience a problem with your computer, perform the checks in this section and run the Dell Diagnostics before you contact Dell for technical assistance.
Configuration Displays your hardware configuration for the selected device. The Dell Diagnostics obtains configuration information for all devices from system setup, memory, and various internal tests, and it displays the information in the device list in the left pane of the screen. The device list may not display the names of all the components installed on your computer or all devices attached to your computer. Parameters Allows you to customize the test by changing the test settings.
A possible graphics card failure has occurred. l l l If the computer has a graphics card, remove the card, reinstall it and then restart the computer. If the problem still exists, install a graphics card that you know works and restart the computer. If the problem persists or the computer has integrated graphics, contact Dell (see your computer Owner's Manual for information about contacting Dell). A possible floppy or hard drive failure has occurred.
3-1-4 Slave interrupt mask register failure 3-2-2 Interrupt vector loading failure 3-2-4 Keyboard Controller Test failure 3-3-1 NVRAM power loss 3-3-2 Invalid NVRAM configuration 3-3-4 Video Memory Test failure 3-4-1 Screen initialization failure 3-4-2 Screen retrace failure 3-4-3 Search for video ROM failure 4-2-1 No timer tick 4-2-2 Shutdown failure 4-2-3 Gate A20 failure 4-2-4 Unexpected interrupt in protected mode 4-3-1 Memory failure above address 0FFFFh 4-3-3 Timer-chip co
Back to Contents Page Before You Begin Dell™ Dimension™ 5100C Service Manual Getting Started Recommended Tools Turning Off Your Computer Before Working Inside Your Computer Getting Started This document provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that the following conditions exist: l You have performed the steps in "Turning Off Your Computer" and "Before Working Inside Your Computer.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network port or device. 2. Disconnect any telephone or network cables from the computer. 3. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board. 4. Remove the computer stand, if it is attached.
Back to Contents Page Replacing the Computer Cover Dell™ Dimension™ 5100C Service Manual CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1. Ensure that all cables are connected and folded out of the way. Pull the power cables toward you so that they do not get caught underneath the drives. 2. Ensure that no tools or extra parts are left inside the computer. 3. Install the cover: a.
Back to Contents Page Removing the Computer Cover Dell™ Dimension™ 5100C Service Manual CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1. Follow the procedures in "Before You Begin." CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
Back to Contents Page Removing and Installing Parts Dell™ Dimension™ 5100C Service Manual Memory Fan Assembly Cards Processor Hard Drive Modem CD/DVD Drive Power Supply Floppy Drive (Optional) System Board Media Card Reader Front I/O Panel Heat-Sink Assembly Battery Memory You can increase your computer memory by installing memory modules on the system board. Your computer supports DDR2 memory. NOTE: Buffered memory is not supported on this computer.
NOTICE: If you remove your original memory modules from the computer during a memory upgrade, keep them separate from any new modules that you may have, even if you purchased the new modules from Dell. If possible, do not pair an original memory module with a new memory module. Otherwise, your computer may not start properly. You should install your original memory modules in pairs either in DIMM connectors 1 and 2 or DIMM connectors 3 and 4.
NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer. 9. Connect your computer and devices to electrical outlets, and turn them on. 10. Right-click the My Computer icon and click Properties. 11. Click the General tab. 12. To verify that the memory is installed correctly, check the amount of memory (RAM) listed.
position. 4. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 6. 5. If you are replacing a card that is already installed in the computer, remove the card. If necessary, disconnect any cables connected to the card. Grasp the card by its top corners, and ease it out of its connector. 6. Prepare the card for installation.
l 12. The notch in the top of the card or filler bracket fits around the alignment guide. Close the card retention door by snapping it into place to secure the card(s). NOTICE: Do not route card cables over or behind the cards. Cables routed over the cards can prevent the computer cover from closing properly or cause damage to the equipment. 13. Connect any cables that should be attached to the card. See the documentation that came with the card for information about the card cable connections.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover. NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently cushion it.
4. Connect the power cable and the serial ATA data cable to the drive. 5. Ensure that all connectors are properly cabled and firmly seated. 6. Slide the drive into place until you feel a click or feel the drive securely installed. 7. Replace the computer cover. NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer. 8. Connect your computer and devices to electrical outlets, and turn them on.
1. Follow the procedures in "Before You Begin." NOTICE: Do not pull the drive out of the computer by the drive cables. Doing so may cause damage to cables and the cable connectors. 2. Remove the computer cover. 3. Pull up on the drive release latch and slide the drive toward the back of the computer. 4. Carefully, so as not to damage the attached interface cable, lift the drive away from the computer.
3. Slide the drive into place until you feel a click or feel the drive securely installed. 4. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents. 5. Replace the computer cover. 6. Connect your computer and devices to their electrical outlets, and turn them on. 7. See the documentation that came with the drive for instructions on installing any software required for drive operation. 8.
6. Disconnect the interface cable from the system board. NOTE: The interface cable is held in place by the metal drive bracket and does not need to be removed from the drive. Installing a Floppy Drive NOTE: If the replacement or new floppy drive does not have the shoulder screws, use the screws in the drive-panel insert. 1. Follow the procedures in "Before You Begin." 2. Remove the computer cover. 3. Slide the drive into place until you feel a click or feel the drive securely installed.
5. Check all cable connections, and fold cables out of the way to avoid blocking the fan and cooling vents. 6. Replace the CD/DVD drive. 7. Replace the computer cover. NOTICE: To connect a network cable, first plug the cable in to the network port or device and then plug it in to the computer. 8. Connect your computer and devices to their electrical outlets, and turn them on.
6. Pull up on the drive release latch and slide the Media Card Reader toward the back of the computer. Then, lift to remove the drive from the computer. Installing a Media Card Reader 1. Follow the procedures in "Before You Begin." 2. Remove the computer cover. NOTE: If necessary, remove the Media Card Reader screws. 3. Remove the Media Card Reader from its packaging and ensure that all the screws are included. 4.
5. Reconnect the data cable on the back of the Media Card Reader to the front-panel connector on the system board. 6. Replace the CD/DVD drive. 7. Replace the computer cover. NOTICE: To connect a network cable, first plug the cable in to the network port or device and then plug it in to the computer. 8. Connect your computer and devices to their electrical outlets, and turn them on.
1 heat-sink assembly CAUTION: The heat-sink assembly can get very hot during normal operation. Be sure that the assembly has had sufficient time to cool before you touch it. 4. Remove the two screws from either side of the heat-sink assembly. NOTICE: After you remove the heat-sink assembly, lay the assembly on its side. Do not set the heat-sink assembly upright or touch the thermal interface to avoid damage to the thermal interface material on the underside. 5.
Processor Removing the Processor NOTICE: Do not perform the following steps unless you are familiar with hardware removal and replacement. Performing these steps incorrectly could damage your system board. For technical service, see "Contacting Dell" in the Owner's Manual. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1. Follow the procedures in "Before You Begin.
NOTICE: Socket pins are delicate. To avoid damage, ensure that the processor is aligned properly with the socket, and do not use excessive force when you install the process. Be careful not to touch or bend the pins on the system board. 4. Set the processor lightly in the socket and ensure that the processor is level in the socket. When the processor is positioned correctly, press it with minimal pressure to seat it. 5. When the processor is fully seated in the socket, close the processor cover. 6.
NOTE: For easier access to the modem, it may be necessary to remove the power cable from the power connector on the system board. 4. Remove the existing modem: a. Disconnect the modem cable from the modem. b. Use a small Phillips screwdriver to remove the two screws that secure the modem to the system board, and set the screws aside. c. Pull straight up on the attached pull-tab to lift the modem out of its connector on the system board.
6. 7. To install a new modem cable and external modem connector: a. Attach the modem cable to the external modem connector. b. Align the external modem connector with the slot on the back on the computer. c. Replace the screw that secures the external modem connector in place. d. Carefully route the cable wire and reconnect the modem cable to the modem. Replace the computer cover.
6. Slide the power supply approximately 1 inch toward the front of the computer. 7. Lift the power supply out of the computer. Replacing the Power Supply 1. Lower the power supply into the computer and slide the power supply toward the back of the computer. 2. Replace the three power supply screws. 3. Reconnect the DC power cables. 4. Replace the computer cover. 5. Connect the AC power cable to the power supply connector.
5. 6. Disconnect the modem cable and ground wire from the modem: a. Disconnect the modem cable from the modem. b. Use a size #1 screwdriver to remove the screws that secure the modem and ground wire to the system board, and set the screws aside. Before you remove the existing system board, visually compare the replacement system board to the existing system board to make sure that you have the correct part. 7. Remove the six screws that attach the system board to the bottom of the computer.
NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer. 11. Connect your computer and devices to electrical outlets, and turn them on. Front I/O Panel CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in your Product Information Guide. 1. Follow the procedures in "Before You Begin.
Replacing the Battery 1. Record all the screens in system setup so that you can restore the correct settings in step 11. 2. Follow the procedures in "Before You Begin." 3. Remove the computer cover. 4. Remove the hard drive. 5. Locate the battery socket (see "System Board Components"). NOTICE: If you pry the battery out of its socket with a blunt object, be careful not to touch the system board with the object.
Back to Contents Page Specifications Dell™ Dimension™ 5100C Service Manual Processor Drives Memory Connectors Computer Information Controls and Lights Video Power Audio Physical Expansion Bus Environmental Processor Processor types Intel® Pentium® 4 5XXX and 6XXX processors with Hyper-Threading technology Pentium D 8XXX dual core processors (no HyperThreading) Intel Celeron® D processors Level 1 (L1) cache 16 KB for Pentium 4 5XXX and 6XXX processors and Celeron D p
x16 slot bidirectional speed: 8 GB/sec PCI Express: connector one x1 connector size 36 pins connector data width (maximum) one PCI Express lane PCI Express: connector one x16 connector size 164 pins connector data width (maximum) 16 PCI Express lanes Drives Externally accessible one slimline 3.5-inch media bay (for optional floppy drive or optional Media Card Reader) one slimline 5.
internal power problem (see "Power Problems" in your computer Owner's Manual). Hard-drive access light green Link integrity light (on integrated network adapter) green light — A good connection exists between a 10-Mbps network and the computer. orange light — A good connection exists between a 100-Mbps network and the computer. off (no light) — The computer is not detecting a physical connection to the network.
Back to Contents Page System Setup Dell™ Dimension™ 5100C Service Manual Overview Entering System Setup System Setup Options Boot Sequence Clearing Forgotten Passwords Clearing CMOS Settings Overview Use system setup as follows: l To change the system configuration information after you add, change, or remove any hardware in your computer l To set or change a user-selectable option such as the user password l To read the current amount of memory or set the type of hard drive install
Processor Info Displays the following information for the processor installed in the system: Processor Type, Processor Clock Speed, Processor Bus Speed, Processor Cache Size, Processor ID number, whether the processor is Hyperthreading or Multiple Core Capable, and if the processor has 64-bit Technology. Memory Info Displays the amount of Installed Memory, Memory Speed, Memory Channel Mode, and a description of the Memory Technology.
Power Management AC Recovery Determines what happens when AC power is restored to the computer. Sets the computer to automatically turn on. Choices are every day or every Monday through Friday. Auto Power On The default setting is Off. This feature does not work if you turn off your computer using a power strip or surge protector. Sets time to automatically turn on the computer. Auto Power Time Time is kept in a 24-hour format (hours:minutes).
NOTE: To boot to a USB device, the device must be bootable. To make sure your device is bootable, check the device documentation. NOTE: You can also change the boot sequence using the Boot Sequence options in the System Setup Options. Changing Boot Sequence for Future Boots 1. Enter system setup. 2. Press the arrow keys to highlight the Boot Sequence menu option and press to access the menu. NOTE: Write down your current boot sequence in case you want to restore it. 3.
11. Connect your computer and devices to electrical outlets, and turn them on. Clearing CMOS Settings CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. 1. Follow the procedures in "Before You Begin." 2. Remove the computer cover. 3. Remove the hard drive. 4. Reset the current CMOS settings: a. Locate the 3-pin CMOS jumper (RTCRST) on the system board. b. Remove the jumper plug from pins 2 and 3. c.
Back to Contents Page Technical Overview Dell™ Dimension™ 5100C Service Manual Front View Back View Inside View of Your Computer System Board Components Power Supply DC Connector Pin Assignments Front View NOTE: The front-panel door does not close when you are using certain Flash Media or IEEE 1394, USB, or headphone connectors. 1 CD/DVD drive eject button Press this button to eject a CD/DVD from the drive.
computer is adequately ventilated. Use only a dry cloth to clean the vent area to avoid water damage to the computer. 6 power button Press this button to turn on the computer. NOTICE: To avoid losing data, do not use the power button to turn off the computer. Instead, perform an operating system shutdown. 7 power light The power light illuminates and blinks or remains solid to indicate different states: ¡ ¡ ¡ ¡ No light — The computer is turned off.
1 link integrity light l l l 2 network adapter connector Green — A good connection exists between a 10-Mbps network and the computer. Orange — A good connection exists between a 100-Mbps network and the computer. Off — The computer is not detecting a physical connection to the network. To attach your computer to a network or broadband device, connect one end of a network cable to either a network port or your network or broadband device.
Inside View of Your Computer CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover. System Board Components Jumper Settings The jumper locations are shown below. Jumper Setting Description PSWD Password features are enabled.
(default) Password features are disabled. RTCRST Real-time clock reset in normal operation. (default) Clear CMOS settings. Power Supply DC Connector Pin Assignments DC Power Connector P1 Pin Number Signal Name 18-AWG Wire 1 +3.3 VDC Orange 2 +3.3 VDC Orange 3 COM Black 4 +5 VDC Red 5 COM Black 6 +5 VDC Red 7 COM Black 8 POK* Gray 9 +5 VFB Purple 10 +12 VDC Yellow 11 +12 VDC* Yellow 12 +3.3 VDC Orange 13 +3.
17 COM Black 18 COM Black 19 COM Black 20 N.C. N.C. 21 +5 VDC Red 22 +5 VDC Red 23 +5 VDC Red 24 COM Black *Use 22 AWG wire instead of 18 AWG. DC Power Connector P2 Pin Number Signal Name 18-AWG Wire 1 COM Black 2 COM Black 3 +12 VDC Yellow 4 +12 VDC Yellow DC Power Connector P3 Pin Number Signal Name 18-AWG Wire 1 +3.
Back to Contents Page Dell™ Dimension™ 5100C Service Manual NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. If you purchased a Dell™ n Series computer, any references in this document to Microsoft® Windows® operating systems are not applicable.
