HP Kayak XU Technical Reference Manual page 36

BIOS Update Crisis
Recovery Procedure
2 System Board
Devices on the ISA Bus
If, for example, during a BIOS update process, the procedure is interrupted
by a power failure, and the system does not start, then you can still recover
the situation of a destroyed system BIOS. However, it should be noted that
during the recovery procedure, there is no image on the screen, nor access
to the keyboard or mouse (only "vital" devices that are required to boot on
the floppy are initialized). Follow these steps to recover the BIOS:
1 Ensure that you have created a DOS-bootable diskette. This floppy dis-
kette contains all the recovery and system BIOS programming software
(phlash.exe, platform.bin and hblxxxyy.Ful). Include the flash command
in the autoexec.bat, for example: phlash /mode=3 hblxxxyy.Ful
2 Turn off the computer. Set Switch 10 to the DOWN position (=on).
3 Insert the DOS-bootable diskette.
4 Power on the computer.
5 During the recovery process, short beeps are emitted. The recover
process is finished when there is a much longer beep (after approximately
1 to 2 minutes).
6 Power off the computer by pressing the power ON/OFF button (for about
5 seconds), until the ON/OFF light switches off. Set the Switch 10 to the
UP position (=off).
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