CAUTION: See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.
The procedures in this document require that you remove the cover and work inside the system. While working inside the system, do not attempt to service the system except as explained in this document and the User's Guide available on support.dell.com. Always follow the instructions closely, and ensure that you review all safety precautions in the Product Information Guide.
Recommended Tools
You may need the following items to perform the procedures in this section:
#2 Phillips screwdriver
Wrist grounding strap
Control-Panel Assembly
Removing the Control Panel
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
Remove the three control-panel securing screws from the system front panel. See Figure C-1.
Lift the control-panel assembly out of the chassis.
Disconnect the control-panel cable from the control-panel assembly.
Figure C-1. Removing and Installing the Control-Panel Assembly
Installing the Control Panel
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Connect the control-panel cable to the control-panel assembly. See Figure C-1.
Lower the control-panel assembly into the system and align it with the front panel.
Secure the control-panel assembly to the system front panel with the three control-panel
securing screws.
Ensure that the control-panel cable is secure in its retaining clip on the chassis.
Close the system. See "Closing the System" in "Troubleshooting Your System."
Reconnect the system to its electrical outlet and turn the system on, including any attached
peripherals.
Fan Interposer Board
Removing a Fan Interposer Board
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
NOTICE: To prevent damage to the drives and backplane, you must remove the SCSI drives and diskette/optical drive carrier from the system before removing the backplane. You must note the number of each hard drive and temporarily label them before removal so that you can replace them in the same locations.
To remove the drive carrier, pull the release latch forward, then slide the carrier out of the chassis. See Figure 7-3.
Remove fans 1 and 3 or 2 and 4 (depending on which fan interposer board is being replaced).
See "Removing a System Fan" in "Installing System Components."
Remove the two screws and remove the fan interposer board. See Figure C-2.
Figure C-2. Removing and Installing a Fan Interposer Board
Installing a Fan Interposer Board
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Slip the two securing tabs on the fan interposer board into the two slots on the side of the fan
bay. See Figure C-2.
Secure the fan interposer board with the two screws.
Slide the drive carrier into its drive bay and press in the release latch. See Figure 7-3.
Install the SCSI hard drives in their original locations. See "Installing a SCSI Hard Drive" in
"Installing Drives."
Close the system. See "Closing the System" in "Troubleshooting Your System."
Reconnect the system to its electrical outlet and turn the system on, including any attached
peripherals.
SCSI Backplane
Removing the SCSI Backplane
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
NOTICE: To prevent damage to the drives and backplane, you must remove the SCSI drives and diskette/optical drive carrier from the system before removing the backplane. You must note the number of each hard drive and temporarily label them before removal so that you can replace them in the same locations.
Remove the processor filler blanks or heat sinks from processors 2 and 4. See "Removing a
Processor" in "Installing System Components."
Disconnect the SCSI, data interface, and power cables from the back of the SCSI backplane.
For improved access, remove the SCSI cable(s) from the clip that is attached to the fan-3 air guard and move the cable(s) away from the backplane; lift up the data interface cable clip from the fan-4 air guard and move the cable away from the backplane. See Figure C-3.
Figure C-3. Removing and Installing SCSI Backplane Cables
NOTICE: When disconnecting the control-panel cable, hold the white pull-tab next to the control-panel cable connector to prevent damage to the SCSI backplane or the cable itself.
Disconnect the control-panel cable from the control-panel cable connector on the front of
the SCSI backplane. See Figure C-4.
Remove the SCSI backplane:
Pull the spring-loaded blue retention pin away from the front of the backplane, then slide
the backplane upward. See Figure C-4.
When the backplane cannot slide upward any farther, pull the backplane toward the back
of the system to remove it from the retention hooks.
Lift the board out of the system, being careful to avoid damaging components on the face
of the board.
Place the SCSI backplane face down on a work surface.
Figure C-4. Removing and Installing the SCSI Backplane
Installing the SCSI Backplane
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Install the SCSI backplane:
Slowly lower the backplane into the system, being careful to avoid damaging components
on the face of the board.
Align the installation alignment slot on the bottom of the backplane with the alignment
pin on the bottom of the chassis. See Figure C-4.
Slide the retention slots on the backplane over the retention hooks on the chassis.
Slide the backplane downward until the blue retention pin snaps into place.
Connect the SCSI, data interface, and power cables to the back of the SCSI backplane.
Secure the SCSI cable(s) in the clip that is attached to the fan-3 air guard; attach the data interface cable clip to the fan-4 air guard to secure the data interface cable. See Figure C-3.
Connect the control-panel cable to the front of the SCSI backplane.
Install the processor filler blanks or heat sinks on processors 2 and 4. See "Installing a
Processor" in "Installing System Components."
Install the SCSI hard drives in their original locations. See "Installing a SCSI Hard Drive" in
"Installing Drives."
Install the optical drive/diskette drive carrier.
Slide the drive carrier into its drive bay and press in the release latch. See Figure 7-3.
Close the system. See "Closing the System" in "Troubleshooting Your System."
Reconnect the system to its electrical outlet and turn the system on, including any attached
peripherals.
System Board
Removing the System Board
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
NOTICE: To prevent damage to the drives and backplane, you must remove the SCSI drives and diskette/optical drive carrier from the system before removing the backplane. You must note the number of each hard drive and temporarily label them before removal so that you can replace them in the same locations.
Remove the heat sinks/processor filler blanks. See "Removing a Processor" in "Installing
System Components."
Disconnect the SCSI, data interface, and power cables from the front of the SCSI backplane.
For improved access, remove the SCSI cable(s) from the clip that is attached to the fan-3 air guard and move the cable(s) away from the backplane; lift up the data interface cable clip from the fan-4 air guard and move the cable away from the backplane. See Figure C-3.
Press in the two release tabs and lift up the front of the expansion-card insulator. See
Figure C-5.
Slide the expansion-card insulator toward the front of the chassis.
Lift the expansion-card insulator out of the chassis.
Figure C-5. Removing and Installing the Expansion-Card Insulator
Place the two slide switches on each side of the chassis in the unlocked position to release the
chassis crossbar, then lift up the crossbar and remove it. See Figure C-6.
Figure C-6. Removing and Installing the Chassis Crossbar
Disconnect all data interface cables, the chassis intrusion switch cable, and the RAID battery
cable (if applicable) from the system board.
Disconnect the power distribution cable harness from the system board.
The power distribution cable harness and the side of the chassis have Velcro pads to hold the cable harness in place while you remove the system board. Bend the cable harness straight up and secure it to the side of the chassis. See Figure C-7.
Figure C-7. Securing the Power Distribution Cable Harness
Remove the RAID battery compartment:
Gently pull the RAID battery compartment straight up. See Figure C-8.
Lift the battery compartment away from the side of the chassis.
Figure C-8. Removing and Installing the RAID Battery Compartment
Remove the system board:
Pull up the spring-loaded blue retention pin located in the center of the system board,
and then slide the system board toward the front of the chassis until it stops. See
Figure C-9.
Slowly and evenly lift the system board above the retention hooks, ensuring that the
system board is clear of all 17 retention hooks, then evenly lift up the left side of the
system board. See Figure C-9.
Lift the system board out of the chassis, left side first.
Figure C-9. Removing and Installing the System Board
Installing the System Board
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Transfer the RAID memory and RAID key (if present), processors, VRMs, and jumpers to the
new system board. See Figure A-3 in "Jumpers, Switches, and Connectors" for the location of
the system board connectors.
NOTE: Do not install the heat sinks/processor filler blanks at this time.
Install the new system board:
Lower the right side of the system board into the chassis.
Slowly lower the left side of the system board into the chassis.
NOTE: Ensure that the SCSI backplane power cable from the power distribution board does not impede the system board as you lower the system board into the chassis.
Slightly lift up the front of the system board and maneuver the system board to the
bottom of the chassis until it lays completely flat.
Ensure that all 17 retention hooks on the bottom of the chassis are inserted into the
retention slots on the system board. See Figure C-9.
Push the system board toward the back of the chassis until the blue retention pin snaps
into place.
Install the RAID battery compartment:
Insert the two securing tabs on the battery compartment into the two securing slots on
the side of the chassis. See Figure C-8.
Press down the battery compartment to secure it.
For ease, connect the cables in the order listed below. See Figure A-3 and Figure A-5 in
"Jumpers, Switches, and Connectors" for the locations of the connectors on the system board
and on the SCSI backplane, respectively.
Power distribution harness to the power connectors on the corner of the system board
Data interface cable from the system board BKPLN SIG connector to the SCSI backplane interface connector
NOTE: Ensure that you attach the data interface cable and its cable clip to the fan-4 air guard. See Figure C-3.
SCSI power cable to the SCSI backplane power connector
RAID battery cable to the system board RAID BAT connector, if applicable
Chassis intrusion switch cable to the system board intrusion switch connector
SCSI A data cable from the system board SCSI_A connector to the SCSI A backplane connector
NOTE: Ensure that you insert the SCSI A cable into the retaining clip on the fan-3 air guard. See Figure C-3.
SCSI B data cable from the system board SCSI_B connector to the SCSI B backplane connector, if applicable
NOTE: Ensure that you insert the SCSI B cable into the retaining clip on the fan-3 air guard. See Figure C-3.
Install the heat sinks/processor filler blanks. See "Installing a Processor" in "Installing System
Components."
Install the chassis crossbar:
Insert the guides on each end of the crossbar into the slots on each side of the chassis. See
Figure C-6.
Slide the crossbar down until the guides are at the bottom of the slots.
Secure the crossbar by sliding the two slide switches on each side of the chassis to the
locked position.
Install the expansion-card insulator:
Slip the two slots on the back of the insulator into the two back retention hooks that
protrude from the bottom of the chassis through the system board. See Figure C-5.
Align the two slots on the front of the insulator over the two front retention hooks that
protrude from the bottom of the chassis through the system board.
Press in the two release tabs on the slots and secure the insulator onto the retention
hooks.
Slide the drive carrier into its drive bay and press in the release latch. See Figure 7-3.
Install the SCSI hard drives in their original locations. See "Installing a SCSI Hard Drive" in
"Installing Drives."
Close the system. See "Closing the System" in "Troubleshooting Your System."
Reconnect the system to its electrical outlet and turn the system on, including any attached
peripherals.
Power Distribution Board
Removing the Power Distribution Board
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
Remove the seven securing screws. See Figure C-10.
Lift the power distribution board out of the chassis.
Figure C-10. Removing and Installing the Power Distribution Board
Installing the Power Distribution Board
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Position the three alignment slots on the power distribution board with the three alignment
tabs on the bottom of the chassis. See Figure C-10.
Secure the power distribution board with the seven screws.
Close the system. See "Closing the System" in "Troubleshooting Your System."
Reconnect the system to its electrical outlet and turn the system on, including any attached
peripherals.
Chassis Intrusion Switch
Removing the Chassis Intrusion Switch
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Turn off the system and attached peripherals, and disconnect the system from the electrical
outlet.
Open the system. See "Opening the System" in "Troubleshooting Your System."
Remove the heat sink or processor filler blank from processor 3. See "Removing a Processor" in
"Installing System Components."
Remove the SCSI cables from the clip that is attached to the fan-3 air guard and move the
cables to the side. See Figure C-3.
Disconnect the intrusion-switch cable from its system board connector. See Figure C-11.
Grasp the intrusion switch by its top and bottom areas and slowly and firmly pull the switch
out from the intrusion-switch clip.
Figure C-11. Removing and Installing the Chassis Intrusion Switch
Installing the Chassis Intrusion Switch
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
Connect the intrusion-switch cable to its system board connector. See Figure C-11.
Align the two grooved sides of the top of the intrusion switch with the inside of the intrusion-switch clip and then gently, but firmly, press in the switch until it is fully seated. See
Figure C-11.
Install the heat sink or processor filler blank on processor 3. See "Installing a Processor" in
"Installing System Components."
Secure the SCSI cable(s) in the clip that is attached to the fan-3 air guard. See Figure C-3.
