Reassembly Notes

Note: Installing a New Motherboard

∙Caution: Replace the motherboard with one that is compatible with the OmniBook model and CPU module—see the table on page 2-19.

∙If any RAM boards are present, transfer them from the old motherboard to the new one:

∙Reprogram the BIOS IC—see the note below.

∙Store the serial number electronically in the new motherboard—see the steps below.

Note: Installing a New Bottom Case

∙Transfer these parts from the old bottom case to the new one:

I/O door, docking doors, and module latches (see the figures below).

Speakers.

∙Install a new regulatory/business card label.

∙Transfer the old serial number label and install a new overlay—or create a new serial number label using the steps below.

∙Route the speaker wires so they do not get pinched or block screw holes.

∙When you install the audio jack PCA, the metal shield goes under the motherboard. If the shield comes off the PCA, you can install the shield after you install the PCA.

∙For an OmniBook 4100 or 4150†, route the fan wires at the bottom of the opening next to the motherboard.

∙When attaching the IR PCA to the right frame, make sure the PCA is parallel with the back of the case.

∙For an OmniBook 4150† with serial number TW924xxxxx, install a rubber VGA spacer on the top of the PCA at the front-left corner. (Service note 4150-11.)

Caution

See “Removing the CPU Module” on page 2-19 for detailed precautions and instructions about installing the CPU module.

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.

HP OmniBook 4100/4150

Removal and Replacement 2-27