IBM 84885BU, Maintenance And Troubleshooting Manual, Page: 100 / 200

Removing the system board
Before you begin:
v Read Appendix B, “Safety information,” on page 143.
v
Review the information in “System reliability guidelines” on page 25.
Notes:
1. When replacing the system board, you must either update the server with the
latest firmware or restore the pre-existing firmware that the customer provides
on a diskette or CD image.
2. Removing the system board will be easier if the server is turned on its side.
To remove the system board, complete the following steps:
1. Turn off the server, if it is on.
2. Disconnect the power cord from the power source and from the server; then,
disconnect all external cables.
3. Remove the side cover (see “Removing the side cover” on page 28).
4. Remove the frame-support bracket (see “Removing and installing the support
bracket” on page 32).
5. Remove the microprocessor air baffle (see “Microprocessor air baffle” on page
67).
6. Disconnect the cables.
7. Remove both adapter-retaining brackets and the adapters (see “Installing an
adapter” on page 51).
8. Remove memory modules (see “Installing a memory module” on page 34).
9. Remove the microprocessors (see “Microprocessor and heat sink” on page
68).
10. Remove the VRM if one is installed (see “Installing an additional
microprocessor” on page 46 for the location of the VRM).
11. Remove the front fan housing.
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xSeries 226 Type 8488 and 8648: Hardware Maintenance Manual and Troubleshooting Guide