14 Net finity 3500 -M20 – T ype 8657 Mod els 21 Y, 2 2Y, 31Y, 32Y ,
The flash memory of the server consists of a primary page
and a bac k up 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 bo ot th e BI OS F l ash Disk et t e to r es to re t he BIO S to th e
pr im a r y pa ge .
To recover the BIOS:
1. Turn off the server and peripheral de vices and discon-
nect all external cables and power cords; then, remove
th e cover.
2. Locate jumpe r J38 on the processor boar d (see “Sys-
tem board switches and jumpers” on page 42). The
jumper consists of three pins, two of which ar e 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 diagr am:
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
a ccept your ch oi ce.
9. Do not reboot the system at this time.
10. Remove the BIOS Flash Diskette from the diskette
drive.
11. Pow er-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-
mally.
Replacing the battery
IBM has designed this product with your safety in mind. The
lithium battery must be handled correctly to avoid possible