Replacing the system board (Types 7390, 7391, and 7392)
1. Remove the cover. See “Removing the cover” on page 114.
2. Lift the fan duct off the heat sink fan.
3. Remove any adapter cards installed in the PCI connectors. See “Replacing a
PCI adapter” on page 121.
4. Remove the drive bay assembly. See “Removing and replacing the drive bay
assembly” on page 118.
5. Take note of the location of all cable connections on the system board and
disconnect all cables. See “Identifying parts on the system board” on page 116.
6. Remove the hard disk drive. See “Replacing the hard disk drive” on page 140.
7. Remove the screws that secure the system board to the chassis.
8. Lift the system board out of the chassis.
9. Remove the retention module from the rear of the failing system board.
10. Remove the memory modules from the failing system board and install them
in the same location on the new system board.
11. Disconnect the heat sink and fan assembly cable from the system board. See
“Identifying parts on the system board” on page 116.
12. Rotate handle 1 to release the heat sink clamp and then disengage the
clamp from the plastic retention bracket.
13. Lift the heat sink and fan assembly off the failing system board.
Chapter 9. Replacing FRUs (Types 7390, 7391, 7392, 7396, 7397, and 7398) 129