HP OmniBook 900 Service Manual page 40

• When lowering the motherboard into the bottom case, make sure the audio jack grounding tabs do
not catch on the bottom case.
• Make sure the speaker and fan wires are not trapped under the motherboard.
Note
If you installed a new motherboard with a new BIOS IC, the IC contains only enough basic
programming to boot the OmniBook. After installing the motherboard, you must reprogram the IC.
Hewlett-Packard prefers that you program the IC with the latest BIOS. You can download it from
the OmniBook website (see page vi)—follow the directions provided.
Storing the Serial Number Electronically
1. Exit Windows and boot to a DOS prompt.
2. Run ESN.EXE from one of these sources:
 On a factory software installation, change to the \Omnibook\Drivers\Hputils directory and
type at the prompt.
esn
 Otherwise, copy \Omnibook\Drivers\Hputils\Esn.exe from the OmniBook 900 Recovery CD,
then run it on the OmniBook.
3. Store the serial number:
 If you are prompted for the serial number, type the serial number shown on the bottom of the
case.
 If a serial number has already been stored, you must call an HP support center to change it.
Installing a New Serial Number Label
If you do not have a master file that creates serial number labels, get a copy from the Reseller website
(see page vi) under Product Support Information in the Service and Support Library.
1. Using any PC connected to a laser printer, open the master serial label file, enter the serial number
and product number from the old serial label, and print the new label on plain white paper. The
new label does not have barcodes.
2. Carefully cut out the new serial label just inside the border and place it into the inner recess in the
bottom case. The bottom of the label goes toward the front of the case.
3. While holding the paper label in place, attach a serial label overlay into the outer recess. It covers
and protects the serial label.
2-20 Removal and Replacement HP OmniBook 900