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Removing and Installing Parts

Dell™ Dimension™ XPS Systems Service Manual

Memory

You can increase your computer memory by installing memory modules on the system board.

Your Dell Dimension™ computer supports DDR2 memory. For additional information on the type of memory supported by your computer, see "Memory."

DDR2 Memory Overview

• DDR2 memory modules should be installed in pairs of matched memory size, speed, and technology. If the DDR2 memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction in performance. See the label in the upper-right corner of the module to determine the module's capacity.
  
  

NOTE: Always install DDR2 memory modules in the order indicated on the system board.

The recommended memory configurations are:

• A pair of matched memory modules installed in DIMM connectors 1 and 2
  
  

or

• A pair of matched memory modules installed in DIMM connectors 1 and 2 and another matched pair installed in DIMM connectors 3 and 4
  
  

NOTICE: Do not install ECC memory modules.

• If you install mixed pairs of DDR2 400-MHz (PC2-3200) and DDR2 533-MHz (PC2-4200) memory, the modules function at the slowest speed installed. Similarly, if you install memory modules with mixed CAS Latency (CL) rates, the modules function at the speed and CAS latency capabilities of the slowest DIMM.
  
  
• Be sure to install a single memory module in DIMM connector 1, the connector closest to the processor, before you install modules in the other connectors.
  
  

NOTE: Memory purchased from Dell is covered under your computer warranty.

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.

Addressing Memory With 4-GB Configurations

Your computer supports a maximum of 4 GB of memory when you use four 1-GB DIMMs. Current operating systems, such as Microsoft® Windows® XP, can only use a maximum of 4 GB of address space; however, the amount of memory available to the operating system is less than 4 GB. Certain components within the computer require address space in the 4-GB range. Any address space reserved for these components cannot be used by computer memory.

Installing Memory

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1. Follow the procedures in "Before You Begin."
   
   
2. Lay the computer on its side so that the system board is on the bottom of the inside of the computer.
   
   
3. Press out the securing clip at each end of the memory module connector.
   
   

4. Align the notch on the bottom of the module with the crossbar in the connector.
   
   

NOTICE: To avoid damage to the memory module, press the module straight down into the connector while you apply equal force to each end of the module.

5. Insert the module into the connector until the module snaps into position.
   
   

If you insert the module correctly, the securing clips snap into the cutouts at each end of the module.

6. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Connect your computer and devices to electrical outlets, and turn them on.
   
   
8. Right-click the My Computer icon and click Properties.
   
   
9. Click the General tab.
   
   
10. To verify that the memory is installed correctly, check the amount of memory (RAM) listed.
    
    

Removing Memory

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1. Follow the procedures in "Before You Begin."
   
   
2. Press out the securing clip at each end of the memory module connector.
   
   
3. Grasp the module and pull up.
   
   

If the module is difficult to remove, gently ease the module back and forth to remove it from the connector.

Cards

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

Your Dell™ computer provides the following slots for PCI and PCI Express cards:

• Four PCI card slots
  
  
• One PCI Express x16 card slot
  
  
• One PCI Express x1 card slot
  
  

PCI Cards

If you are installing or replacing a card, follow the procedures in the next section. If you are removing but not replacing a card, see "Removing a PCI Card."

If you are replacing a card, remove the current driver for the card from the operating system.

If you are installing or replacing a PCI Express card, see "Installing a PCI Express Card."

Installing a PCI Card

1. Follow the procedures in "Before You Begin."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   

3. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 5.
   
   
4. 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.

5. Prepare the card for installation.
   
   

See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer.

CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any cards.

6. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.
   
   

If the card is full-length, insert the end of the card into the card guide bracket as you lower the card toward its connector on the system board. Insert the card firmly into the card connector on the system board.

7. Before you lower the retention arm, ensure that:
   
   
   • The tops of all cards and filler brackets are flush with the alignment bar.
     
     
   • The notch in the top of the card or filler bracket fits around the alignment guide.
     
     
8. Press the retention arm into place, securing the card(s) in the computer.
   
   

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.

9. Connect any cables that should be attached to the card.
   
   

See the documentation for the card for information about the card's cable connections.

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

10. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
    
    
11. If you installed an add-in network adapter and want to disable the integrated network adapter:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Network Interface Card to Off.
       
       
    2. Connect the network cable to the add-in network adapter's connectors. Do not connect the network cable to the integrated connector on the back panel.
       
       
12. Install any drivers required for the card as described in the card documentation.
    
    

Removing a PCI Card

1. Follow the procedures in "Before You Begin."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   
3. If necessary, disconnect any cables connected to the card.
   
   
4. Grasp the card by its top corners, and ease it out of its connector.
   
   
5. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
   
   

If you need a filler bracket, contact Dell.

NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep dust and dirt out of your computer.

6. Lower the retention arm and press it into place, securing the card(s) in the computer.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Close the computer cover, reconnect the computer and devices to electrical outlets, and turn them on.
   
   
8. Remove the card's driver from the operating system.
   
   
9. If you removed an add-in network connector and want to enable the integrated network adapter:
   
   
   1. Enter system setup, select Integrated Devices, and then change the setting for Network Interface Card to On.
      
      
   2. Connect the network cable to the integrated connector on the computer back panel.
      
      

PCI Express Cards

Your computer supports one PCI Express x16 card and one PCI Express x1 card.

If you are installing or replacing a PCI Express card, follow the procedures in the next section. If you are removing but not replacing a card, see "Removing a PCI Express Card."

If you are replacing a card, remove the current driver for the card from the operating system.

If you are installing or replacing a PCI card, see "Installing a PCI Express Card."

Installing a PCI Express Card

1. Follow the procedures in "Before You Begin."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   

3. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 5.
   
   
4. 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. If your card includes a retention mechanism, remove the top of the retention mechanism by pressing the tab and pulling up on the top. Gently pull the securing tab, grasp the card by its top corners, and ease it out of its connector.

5. Prepare the card for installation.
   
   

See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer.

CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any cards.

6. If you are installing the card into the x16 card connector, position the card so the securing slot is aligned with the securing tab, and gently pull the securing tab.
   
   
7. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.
   
   

If the card is full-length, insert the end of the card into the card guide bracket as you lower the card toward its connector on the system board. Insert the card firmly into the card connector on the system board.

8. If you replaced a card that was already installed in the computer and you removed the top of the retention mechanism, you may reinstall the top.
   
   
9. Before you lower the retention arm, ensure that:
   
   
   • The tops of all cards and filler brackets are flush with the alignment bar.
     
     
   • The notch in the top of the card or filler bracket fits around the alignment guide.
     
     
10. Press the retention arm into place, securing the card(s) in the computer.
    
    

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.

11. Connect any cables that should be attached to the card.
    
    

See the documentation for the card for information about the card's cable connections.

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

12. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
    
    
13. If you installed an add-in network adapter and want to disable the integrated network adapter:
    
    
    1. Enter system setup, select Network Controller, and then change the setting to Off.
       
       
    2. Connect the network cable to the add-in network adapter's connectors. Do not connect the network cable to the integrated connector on the back panel.
       
       
14. Install any drivers required for the card as described in the card documentation.
    
    

Removing a PCI Express Card

1. Follow the procedures in "Before You Begin."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   
3. If necessary, disconnect any cables connected to the card.
   
   
4. If your card includes a retention mechanism, remove the top of the retention mechanism by pressing the tab and pulling up on the top.
   
   
5. Gently pull back the securing tab, grasp the card by its top corners, and then ease it out of its connector.
   
   
6. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
   
   

If you need a filler bracket, contact Dell.

NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep dust and dirt out of your computer.

7. Lower the retention arm and press it into place, securing the card(s) in the computer.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

8. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
   
   
9. Remove the card's driver from the operating system.
   
   
10. If you removed an add-in network connector:
    
    
    1. Enter system setup, select Network Controller, and then change the setting to On.
       
       
    2. Connect the network cable to the integrated connector on the computer back panel.
       
       
11. Install any drivers required for the card as described in the card documentation.
    
    

Drives

Your computer supports a combination of these devices:

• Up to three hard drives
  
  
• One floppy drive
  
  
• Up to two CD or DVD drives
  
  

General Installation Guidelines

Connect serial ATA hard drives and serial CD/DVD drives to the system board connectors labeled SATA-0, SATA-1, SATA-2, or SATA-3. Connect IDE CD/DVD drives to the connector labeled PRI IDE.

When you connect two IDE devices to a single IDE interface cable and configure them for the cable select setting, the device attached to the last connector on the interface cable is primary or the boot device (drive 0), and the device attached to the middle connector on the interface cable is the secondary device (drive 1). See the drive documentation in your upgrade kit for information on configuring devices for the cable select setting.

Connecting Drive Cables

When you install a drive, you connect two cables—a DC power cable and a data cable—to the back of the drive and to the system board. Some drives may also have an audio connector; one end of the audio cable will attach to the drive connector and the other will attach to the system board.

Drive Interface Connectors

Serial ATA Connector

Most interface connectors are keyed for correct insertion; that is, a notch or a missing pin on one connector matches a tab or a filled-in hole on the other connector.

When connecting an IDE cable, ensure you align the colored stripe with the pin 1 connector. When disconnecting an IDE cable, grasp the colored pull tab and pull until the connector detaches.

When connecting and disconnecting a serial ATA cable, hold the cable by the connector at each end.

NOTE: The system board serial ATA connector may have an attached cover or shroud.

Power Cable Connector

Hard Drive

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

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.

1. If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this procedure.
   
   
2. Follow the procedures in "Before You Begin."
   
   

Removing a Hard Drive

1. Press in on the top shroud tabs and tilt the shroud back.
   
   
2. Lift the shroud away from the hard drive.
   
   

3. Disconnect the power and hard-drive cables from the drive and from the system board.
   
   

4. Press in on the tabs on each side of the drive and slide the drive up and out.
   
   

Installing a Hard Drive

1. Unpack the replacement hard drive, and prepare it for installation.
   
   
2. Check the documentation for the drive to verify that it is configured for your computer.
   
   
3. If your replacement hard drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

4. Install the hard drive into the computer by gently sliding the drive into place until the tabs securely click into position.
   
   

NOTE: If you are installing a hard drive in the lower bay, place the drive in the bay so that the power connector is on the left-hand side (opposite of the top hard drive)

.

5. Connect a power cable to the drive.
   
   
6. Connect the hard-drive cable to the drive and to the system board.
   
   
7. Check all connectors to be certain that they are properly cabled and firmly seated.
   
   

NOTICE: When replacing the hard-drive shroud, ensure that all the cables are properly routed.

8. Insert the bottom tabs of the shroud in to the holes on the drive cage and rotate the shroud up.
   
   
9. Press in on the top tabs and lock them in to place.
   
   
10. Gently press on the shroud to ensure it is secure.
    
    

11. Close the computer cover.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

12. Connect your computer and devices to electrical outlets, and turn them on.
    
    

See the documentation that came with the drive for instructions on installing any software required for drive operation.

13. If the drive you just installed is the primary drive, insert a bootable floppy disk into drive A.
    
    
14. Turn on the computer.
    
    
15. Enter system setup, and update the appropriate Drive option.
    
    
16. Exit system setup, and restart the computer.
    
    
17. Partition and logically format your drive before you proceed to the next step.
    
    

See the documentation for your operating system for instructions.

18. Test the hard drive by running the Dell Diagnostics.
    
    
19. If the drive you just installed is the primary drive, install your operating system on the hard drive.
    
    

Adding a Second Hard Drive

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.

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.

1. Check the documentation for the drive to verify that it is configured for your computer.
   
   
2. Follow the procedures in "Before You Begin."
   
   
3. Remove the two plastic rails from the inside of the hard-drive bay by gently pulling the rails up and out of the bay.
   
   
4. Attach the rails to the hard drive using the two screws attached to the rails.
   
   

Ensure that the rail tabs are positioned at the back of the hard drive.

NOTICE: Do not install any drive into the lower hard-drive bay until you have removed the green drive rails from the inside of the hard-drive bay.

5. Remove the first hard drive from the upper bay and install it in the lower bay:
   
   
   1. Disconnect the power and the hard-drive cables from the back of the first hard drive.
      
      
   2. Press in the two rail tabs and pull the first hard drive out of the upper bay.
      
      
   3. Gently slide the first hard drive into the lower bay until you hear a click.
      
      
   4. Reconnect the power and hard-drive cables to the back of the first hard drive.
      
      
6. Gently slide the new hard drive into the upper bay until you hear a click.
   
   

7. Connect a power cable to the drive.
   
   
8. Connect the hard-drive cable to the drive and to the system board.
   
   
9. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network device and then plug it into the computer.

10. Connect your computer and devices to their electrical outlets, and turn them on.
    
    

See the documentation that came with the drive for instructions on installing any software required for drive operation.

Floppy Drive

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.

Follow the procedure in "Before You Begin."

NOTE: If you are adding a floppy drive, see "Installing a Floppy Drive."

Removing a Floppy Drive

1. Disconnect the power and data cables from the back of the floppy drive.
   
   
2. Disconnect the other end of the data cable from the system board.
   
   

3. Press inward on the two tabs on the sides of the drive, slide the drive upward, and remove it from the floppy-drive bay.
   
   

Installing a Floppy Drive

1. If you are replacing a drive and the new drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

2. Gently slide the drive into place until the tabs securely click into position.
   
   

3. Attach the power and data cables to the floppy drive.
   
   
4. Connect the other end of the data cable to the connector labeled FLOPPY on the system board.
   
   
5. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
   
   
6. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Connect your computer and devices to electrical outlets, and turn them on.
   
   

See the documentation that came with the drive for instructions on installing any software required for drive operation.

8. Enter system setup and update the appropriate Diskette Drive option.
   
   
9. Verify that your computer works correctly by running the Dell Diagnostics.
   
   

CD/DVD Drive

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.

Removing a CD/DVD Drive

1. Follow the procedures in "Before You Begin."
   
   
2. Disconnect the power and data cables from the back of the drive.
   
   

3. Press inward on the two tabs on the sides of the drive, and then slide the drive upward and remove it from the drive bay.
   
   

Installing a CD/DVD Drive

1. If you are installing a new drive, unpack the drive and prepare it for installation.
   
   

Check the documentation that accompanied the drive to verify that the drive is configured for your computer. If you are installing an IDE drive, configure the drive for the cable select setting.

2. Connect the new drive to the set of rails that are attached to the inside of the cover. If a set of rails is not attached inside the computer cover, contact Dell.
   
   
3. If you are installing a replacement drive and the new drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

4. Gently slide the drive into place until the tabs securely click into position.
   
   
5. Connect the power and data cables to the drive.
   
   

If you are adding a drive that has an audio cable, connect the audio cable to the audio connector on the system board.

6. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
   
   
7. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

8. Connect your computer and devices to electrical outlets, and turn them on.
   
   

See the documentation that came with the drive for instructions on installing any software required for drive operation.

9. Enter system setup and select the appropriate Drive option.
   
   
10. Verify that your computer works correctly by running the Dell Diagnostics.
    
    

Processor Airflow Shroud

Removing the Processor Airflow Shroud

CAUTION: Before you perform this procedure, follow the safety instructions in the Product Information Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

NOTICE: To avoid damaging the fan power cables, do not slide the shroud too quickly.

1. Follow the procedures in "Before You Begin."
   
   
2. Press the shroud release tabs towards one another.
   
   
3. Lift the shroud up to disengage the anchors.
   
   
4. Once the shroud has been disengaged from the anchors, unplug the fan cables from their connectors on the system board.
   
   

Installing the Processor Airflow Shroud

1. Attach both fan power cables to the connectors on the system board.
   
   
2. Align the anchor tabs with the securing slots.
   
   
3. Gently press the shroud until the anchor tabs snap securely into place.
   
   
4. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

Connect your computer and devices to electrical outlets, and turn them on.

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.

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. Disconnect the cooling fan power cable from the REAR FAN1 connector (see "System Board Components") on the system board.
   
   
3. Disconnect the power cable from the 12V PWR connector (see "System Board Components") on the system board.
   
   
4. Lift up the airflow shroud.
   
   

CAUTION: The heat sink can get very hot during normal operation. Be sure that the heat sink has had sufficient time to cool before you touch it.

5. Remove the heat sink:
   
   
   1. On the retention base locate the tab opposite the power supply. Press on the retention base tab until the heat sink pops up slightly.
      
      
   2. Press out on the second retention tab while lifting the heat sink up and out of the retention base.
      
      

NOTICE: Lay the heat sink down on its side.

NOTICE: If you are installing a processor upgrade kit from Dell, discard the original heat sink. If you are not installing a processor upgrade kit from Dell, reuse the original heat sink and blower when you install your new processor.

6. Push down and out on the socket release lever.
   
   
7. Open the processor cover.
   
   

8. To remove the processor from the socket, lift the processor vertically in one motion.
   
   

Leave the release lever extended in the release position so that the socket is ready for the new processor.

Installing the Processor

NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer.

1. Unpack the new processor.
   
   

NOTICE: You must position the processor correctly in the socket to avoid permanent damage to the processor and the computer when you turn on the computer.

2. If the release lever on the socket is not fully extended, move it to that position.
   
   
3. Align the pin-1 corners of the processor and socket.
   
   

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. Pivot the socket release lever back toward the socket and snap it into place to secure the processor.
   
   

NOTICE: If you are not installing a processor upgrade kit from Dell, reuse the original heat sink assembly when you replace the processor.

If you installed a processor replacement kit from Dell, return the original heat sink assembly and processor to Dell in the same package in which your replacement kit was sent.

7. Install the heat sink:
   
   
   1. Slide one end of the heat sink under the retention tab.
      
      
   2. Pull out the other retention tab and lower the heat sink until it fits securely in the base.
      
      

NOTICE: Ensure the heat sink is correctly seated and secure.

8. Reinstall the retention module clips.
   
   
9. Lower the airflow shroud over the heat sink.
   
   
10. Reconnect the cooling fan power cable to the REAR FAN1 connector (see "System Board Components") on the system board.
    
    
11. Reconnect the power cable to the 12V PWR connector (see "System Board Components") on the system board.
    
    
12. Close the computer cover.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

System Board

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the System Information Guide.

NOTICE: The system board and metal tray are connected and are removed as one piece.

Removing the System Board

1. Follow the procedures in "Before You Begin."
   
   
2. Open the computer cover.
   
   
3. Remove any components that restrict access to the system board.
   
   
4. Disconnect all cables from the system board.
   
   
5. Before you remove the existing system board assembly, visually compare the replacement system board to the existing system board to make sure that you have the correct part.
   
   
6. Remove the system board screw.
   
   

.

7. Pull up on the two tabs, slide the system board assembly toward the front of the computer, and then lift the assembly up and away.
   
   
8. Place the system board assembly that you just removed next to the replacement system board.
   
   

Replacing the System Board

1. Transfer components from the existing system board to the replacement system board:
   
   
   1. Remove the memory modules and install them on the replacement board.
      
      

CAUTION: The processor package and heat-sink assembly can get hot. To avoid burns, ensure that the package and assembly have had sufficient time to cool before you touch them.

2. Remove the heat-sink assembly and processor from the existing system board and transfer them to the replacement system board.
   
   
2. Configure the settings of the replacement system board.
   
   
3. Set the jumpers on the replacement system board so they are identical to the ones on the existing board.
   
   

NOTE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing system board.

4. Orient the replacement board by aligning the notches on the bottom of the board with the tabs on the computer.
   
   
5. Slide the system board assembly toward the back of the computer until the assembly clicks into position.
   
   
6. Replace any components and cables that you removed from the system board.
   
   
7. Reconnect all cables to their connectors at the back of the computer.
   
   
8. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

9. Connect your computer and devices to electrical outlets, and turn them on.
   
   

Power Supply

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

Removing the Power Supply

NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before removing a component from the system board, verify that the auxiliary power LED on the system board has turned off. To locate this light, see "System Board Components."

1. Follow the procedures in "Before You Begin."
   
   
2. Remove the cards and the card fan.
   
   
3. Disconnect the power supply cables and the card fan cable.
   
   

NOTICE: To avoid damaging the cables when you reinstall the power supply, replace the cables as shown below.

Front Panel

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

Removing the Front Panel

1. Follow the procedures in "Before You Begin."
   
   
2. Disconnect and remove all disk drives (for more information, see "Drives").
   
   
3. Release the front panel by pressing each of the seven front-panel release tabs.
   
   

4. Close the computer cover halfway and pull the front panel away from the computer.
   
   

Front LED Board

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

Removing the Front LED Board

1. Follow the procedures in "Before You Begin."
   
   
2. Remove the front panel.
   
   
3. Disconnect the LED cable from the system board.
   
   
4. Remove the screw.
   
   
5. Gently move the board upward, tilt the top of the board away from the case to release it from the three front LED board guides, and then draw the board away from the case.
   
   

To replace the front LED board, perform the removal procedure in reverse.

Drive Door

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

Removing the Drive Door

1. Open the drive door.
   
   

2. Unsnap the top bracket hinge and pull the top of the drive door outward, away from the computer.
   
   

3. Lift the bottom bracket hinge away from the computer.
   
   

Replacing the Drive Door

To prevent damage to your computer, the drive door is designed to "break away" from the computer if it is opened too far. If the drive door detaches from the computer without disassembling, perform the removal procedure in reverse.

If the drive door is open and it is opened too far, instead of breaking away from the computer in one piece, the drive door may disassemble into several smaller pieces. If the drive door disassembles:

1. If necessary, reattach the door hinges to the door bracket. Ensure that the hinge tabs are away from the door bracket.
   
   

2. Attach the door bracket/door hinge assembly to the door, starting with the lower part of each door hinge.
   
   

3. Attach the drive door to the computer, starting with the bottom bracket hinge.
   
   

Battery

Replacing the Battery

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

A coin-cell battery maintains computer configuration, date, and time information. The battery can last several years.

If you have to repeatedly reset time and date information after turning on the computer, replace the battery.

CAUTION: A new battery can explode if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions.

To replace the battery:

1. Record all the screens in system setup so that you can restore the correct settings in step 7.
   
   
1. Follow the procedures in "Before You Begin."
   
   
2. Locate the battery socket.
   
   

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. Ensure that the object is inserted between the battery and the socket before you attempt to pry out the battery. Otherwise, you may damage the system board by prying off the socket or by breaking circuit traces on the system board.

3. Remove the battery by pressing on the tab to pop the battery upward, and then carefully prying it out of its socket with your fingers or with a blunt, nonconducting object such as a plastic screwdriver.
   
   

4. Insert the new battery into the socket with the side labeled "+" facing up, and snap the battery into place.
   
   
5. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network device and then plug it into the computer.

6. Connect your computer and devices to electrical outlets, and turn them on.
   
   
7. Enter system setup and restore the settings you recorded in step 1.
   
   
8. Properly dispose of the old battery. See the Product Information Guide for battery disposal information.
   
   

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