IBM xSeries 240 81Y Hardware Maintenance Manual page 25

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.pc.ibm.com/support/, select IBM
Server Support, and make the selections for your
server.
The flash memory of your server contains a protected area
that cannot be overwritten. The recovery boot block is a
section of code in this protected area that enables the
server to start up and to read a flash diskette. The flash
utility recovers the system BIOS from the BIOS recovery
files on the diskette.
To recover the BIOS:
Before you begin:
Read "Safety information" on page 224.
1. Turn off the server and peripheral devices and
disconnect all external cables and power cords (see
"Preparing to install options" on page 96); then
remove the cover (see "Removing the left-side cover
(tower model)" on page 99 or "Removing the cover
(rack model)" on page 100).
2. Locate switch block 2 (SW2) on the system board
(see "System board component locations" on
page 161).
3. Set switch 1 on switch block 2 to ON to enable BIOS
recovery mode.
4. Insert the BIOS flash diskette into the diskette drive.
5. Restart the server.
The Recovery Boot screen will appear. A progress
report, Loading data from diskette xx%, is
displayed. When programming is underway, a further
progress report, Programming block n of 7 yy%, is
displayed. When recovery is complete, Recovery
complete, remove the diskette and return boot
block switch to the off position before
rebooting.
6. Remove the flash diskette from the diskette drive.
7. Turn the server off.
8. Set switch 1 on switch block 2 (SW2) to Off to return
to normal startup mode.
9. Restart the server. The system should start up
normally.
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xSeries 240