IBM 689912U Hardware Maintenance Manual - Page 93

Replacing a System Board Notes 1. The BIOS and Vital Product Data (VPD) for the computer you are servicing must be installed on the new system board (FRU) after it is installed in the computer. To do this, you must run the Flash Update program using the Flash Update diskette. See "BIOS Levels" on page 200 "Vital Product Data" on page 192, and "Flash (BIOS/VPD) Update Procedure" on page 201. 2. Always ensure the latest level of BIOS is installed on the computer. A down level BIOS may cause false errors and unnecessary replacement of the system board. 3. The processor is a separate FRU from the system board and is not included with the system board FRU. If you are instructed to replace the system board, do the following. 4. Remove the processor from the old system board and install it on the new system board. For Type 6588, 6888, see "Microprocessor Removal (Type 6588, 6888)" on page 284. 5. Remove any of the following installed options on the old system board, and install them on the new system board. External cache memory and cache tag RAM Memory modules Extended video memory 6. Ensure that the new system board jumper settings match the old system board jumper settings. 7. If the new system board does not correct the problem, reinstall the options on the old system board, reinstall the old system board, then replace the processor. System Board Replacement (Type 6588, 6888) To remove the system board, remove: System board mounting screws Four screws holding the microprocessor retention bracket Two front screws Lift the system board out of the system unit. Leave the system board plate (that was located under the system board) in the system unit. To install a system board: Position the new system board over the system board plate and install: - Retention bracket and four screws Service Information 83