Power Checkout - IBM 8676 - Eserver xSeries 335 Hardware Maintenance Manual And Troubleshooting Manual

The flash memory of the server consists of a primary page and a backup page. The
J38 jumper controls which page is used to start the server. If the BIOS code in the
primary page is damaged, you can use the backup page to start the server; then,
start the BIOS flash diskette to restore the BIOS code to the primary page.
Complete the following steps to recover the BIOS code:
10. Turn off the server.
11. Move the jumper on J38 to pins 1 and 2 to return to normal startup mode.
12. Replace the cover and restart the server. The system should start up normally.

Power checkout

Power problems can be difficult to solve. For example, a short circuit can exist
anywhere on any of the power distribution buses. Usually a short circuit will cause
the power subsystem to shut down because of an overcurrent condition.
A general procedure for troubleshooting power problems is as follows:
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xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide
1. Turn off the server and peripheral devices and disconnect all power cords and
external cables; then, remove the cover.
2. Locate jumper J38 (flash-ROM page swap) on the system board.
Flash ROM
jumper (J38)
3. Move the jumper to pins 2 and 3 to enable BIOS recovery mode.
4. Reconnect all external cables and power cords and turn on the peripheral
devices.
5. Insert the BIOS flash diskette into the diskette drive and restart the server. The
system begins the power-on self-test (POST).
6. The Flash Update Utility program displays the Flash Update Menu. Select 1 -
Update POST/BIOS.
7. When prompted as to whether you want to save the current code to a diskette,
press N.
8. When prompted to choose a language, select a language (from 0 to 7) and
press Enter to accept your choice.
9. Attention: Do not restart the server at this time.
Remove the flash diskette from the diskette drive.