Service Manual


1. Transfer components from the existing system board to the replacement system board, if applicable.

2. Orient the system board assembly by aligning the notches on the bottom of the assembly with the tabs on the computer.

3. Slide the system board assembly toward the back of the computer until the assembly clicks into place.

4. Replace the two screws to secure the system board assembly to the chassis.

5. Align the screw holes on the card fan assembly with the screw holes on the system board assembly, then replace the two screws to secure the card fan
assembly.

6. Connect the fan cable to the FAN_CAGE connector on the system board (see System Board Components).

7. Replace any expansion cards that you removed (see Installing PCI and PCI Express Cards).

8. Replace any additional components that you removed from the system board.

9. Reconnect all cables to the system board.

10. Replace the computer cover (see Replacing the Computer Cover).

11. Connect your computer and devices to electrical outlets, and then turn them on.

12. Flash the system BIOS, as needed.
Power Supply


Removing the Power Supply

1. Follow the procedures in Before You Begin.

2. Remove the computer cover (see Removing the Computer Cover).

3. Follow the DC power cables that stem from the power supply and disconnect each connected power cable.

4. Remove all hard drives installed in the interior hard-drive bays (see Removing a Hard Drive).

5. Remove the optional hard-drive fan, if applicable (see Removing the Optional Hard Drive Fan).

6. Remove the two screws that attach each hard-drive bay.

7. Remove the hard-drive bays from the chassis.
NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into your computer.
NOTE: For information on flashing the system BIOS, see support.dell.com.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: Note the location and ID of each power connector before disconnecting the power supply cables.
NOTE: Note the routing of the power cable bundles as you disconnect them. You must route these cables properly when you replace them to
prevent them from being pinched or crimped.