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14 Netfinity 3500-M20 – Type 8657 Models 21Y, 22Y, 31Y, 32Y,
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 in the primary page is
corrupted, you can use the backup page to start the server;
then boot the BIOS Flash Diskette to restore the BIOS to the
To recover the BIOS:
1. Turn off the server and peripheral devices and discon-
nect all external cables and power cords; then, remove
2. Locate jumper J38 on the processor board (see “Sys-
tem board switches and jumpers” on page 42). The
jumper consists of three pins, two of which are covered
by a jumper.
3. Move the J38 jumper from its current location to con-
nect the center pin and the pin on the opposite end of
the connector block, as shown in the following diagram:
4. Insert the BIOS flash diskette into the diskette drive.
5. Restart the server.
6. The system begins the power-on self-test (POST).
Select 1 – Update POST/BIOS from the menu that con-
tains various flash (update) options.
7. When you are asked whether you want to save the cur-
rent code to a diskette, type N.
8. You will be asked to choose which language you wish
to use. Select your language (0-7) and press Enter to
accept your choice.
9. Do not reboot the system at this time.
10. Remove the BIOS Flash Diskette from the diskette
11. Power-off the server.
12. Move jumper J38 back to its original setting to return to
normal startup mode.
13. Restart the server. The system should start up nor-
Replacing the battery
IBM has designed this product with your safety in mind. The
lithium battery must be handled correctly to avoid possible