Recovering The Bios - Zenith z-server lt User Manual

Recovering the BIOS

The flash memory boot jumper, E091, enables the BIOS flash
memory special recovery mode. The system BIOS can be
corrupted when the update procedure is aborted due to a power
outage. The flash memory contains a protected area that cannot
be corrupted. Code in this area is used to boot the computer from
drive A when the BIOS has been corrupted. After booting, the
flash update utility is used to automatically recover the system
BIOS from the BIOS recovery files on the diskette.
Note: If you have mapped the BIOS of an add-in board to any
part of the E0000H address range, you must either map it to
another area or physically remove the board from the system
before a recovery procedure can be completed. You do not have to
remove add-in boards for normal BIOS updates.
1. Power off the system and remove the covers as described in
the Upgrades and Options chapter.
2. Ensure that the flash memory jumper, E0721, is on pins 1
and 2 (default).
3. Move the flash memory boot jumper, E0191, to pins 2 and 3.
4. Insert the flash memory update disk in drive A and power
on the system. The recovery process is automatic.
Note: Since there is no monitor display and the keyboard is
disabled during the recovery process, the recovery status is
identified by beep codes:
Two beeps indicate the recovery was successful.
Four beeps indicate the system could not boot the disk.
Continuous beeps indicate the wrong BIOS recovery files
are in used and/or the flash memory jumper, E0721, is
not set properly.
5. When the recovery process is complete, power off the system
and move the flash memory boot jumper, E0191, back to
pins 1 and 2.
6. Replace the covers, power on the system, and run the ECU to
configure the systemas described earlier in this chapter.
Configuring Your System
3-18