Repairing The Bios Ic (Hp Authorized Service Providers Only) - HP 6000 Service Manual

Repairing the BIOS IC
(HP Authorized Service Providers Only)
The BIOS IC of the computer is not replaceable:
If the BIOS IC is defective, you must replace the power supply PCA on Omnibook 6000 models or
the motherboard on Omnibook 6100 models.
However, if the BIOS IC might only be corrupted, you can attempt to repair it using a Crisis
Recovery floppy—see the information below.
Note: Reprogramming the BIOS IC
A new BIOS IC contains only enough basic programming to boot the Omnibook. After installing a
new power supply PCA, you must reprogram the BIOS IC, preferably with the latest BIOS. You can
download the latest BIOS from the HP Notebook Web site (see page vi)—follow the directions
provided.
If you do not have a BIOS Crisis Recovery floppy, download the package from the Partnership Web
site (see page vi) under Product Support Information in the Service and Support Library. Follow the
instructions for creating the floppy.
Caution
Make sure you are using the correct BIOS Crisis Recovery floppy for the Omnibook model you are
repairing. The program does not verify the Omnibook model, so you could install the wrong BIOS
image.
1. Insert the BIOS Crisis Recovery floppy in the floppy drive.
2. If the computer does not boot from the BIOS Crisis Recovery floppy, try plugging the boot-block
jumper into the Omnibook parallel port, then go to the next step. See the wiring diagram below.
(In many situations you can skip this step—especially if the computer previously displayed a BIOS
checksum error.)
3. Turn on the computer and allow it to boot from the floppy disk.
If the computer does not turn on at all, do the following steps to boot from the floppy disk:
Unplug the AC adapter.
Press and hold Fn+B.
Plug in the AC adapter.
Release Fn+B.
4. Wait while the BIOS is reprogrammed—the display is blank for a minute or more while this
happens.
If you plugged in a boot block jumper, unplug it before the computer automatically reboots.
5. After the BIOS is repaired and reprogrammed, check the BIOS version to see whether it is the
latest version. If necessary, reprogram the BIOS IC—see the note at the beginning of this topic.
HP Omnibook 6000/6100 Removal and Replacement 2-33