Replacing the system board
This procedure describes how to remove and replace the system board.The
procedure varies depending upon the machine type.
Important
The heat sink and microprocessor might be very hot. Make sure these
components are cool enough to safely handle before continuing this
procedure.
Note: When replacing the system board you must also order a new retention
module for the new system board. Make sure you have a retention module
for the new system board before continuing with this procedure.
1. Remove the cover. See “Removing the cover” on page 117.
2. Place the computer on its right side to help make the system board more
accessible.
3. Remove any adapter cards installed in the PCI connectors.
4. Disconnect the signal and power cables from the hard disk drive.
5. Press the release tab 1 down, slide the hard drive cage 2 back, and pivot
the hard disk drive outward as shown.
6. Carefully take note of the location of all cable connections on the system
board and disconnect all cables. See the system board illustration for your
machine type at “System board connectors” on page 116.
7. Remove the screws that secure the system board to the chassis.
8. Lift the system board out of the chassis.
9. Remove the memory modules from the failing system board and install them
in the same location on the new system board.
10. Disconnect the heat sink and fan assembly cable from the system board. See
the system board illustration for your machine type at “System board
connectors” on page 116.
120 HardwareMaintenance Manual