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Chapter 6. Solving problems 97
Recovering the BIOS code
If the BIOS code has become damaged, such as from a power failure during a flash
update, you can recover the BIOS code using the flash ROM page-swap jumper (J38)
and a BIOS flash diskette.
Note: You can obtain a BIOS flash diskette from one of the following sources:
• Use the ServerGuide program to make a BIOS flash diskette.
• Download a BIOS flash diskette from the World Wide Web. Go to
http://www.ibm.com/pc/support/, select IBM Server Support, and
make the selections for your server.
• Contact your IBM service representative.
The flash memory of your 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.
To recover the BIOS code, do the following:
1. Turn off the server and peripheral devices and disconnect all external cables and
power cords; then, remove the cover.
2. Locate jumper J38 on the system board.
3. Move J38 to the "lo" setting (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.
6. Restart the server. The system begins the power-on self-test (POST).
7. Select 1 - Update POST/BIOS from the menu that contains various flash (update)
options.
8. When prompted as to whether you want to save the current code to a diskette,
press N.
9. When prompted to choose a language, select a language (from 0 to 7) and press
Enter to accept your choice.
10. Do not restart your system at this time.
11. Remove the BIOS flash diskette from the diskette drive.
Flash ROM
page-swap
jumper (J38)
Switch block