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2-18 Removal and Replacement HP OmniBook 4100
Reassembly Notes
Note: Installing a New Motherboard
• If a RAM board is present, transfer it 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.
• Install a new serial number label and overlay—see the steps below.
• Route the speaker wires so they do not get pinched or block screw holes.
• 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.
• Before installing the CPU module, assemble it into the bottom plate and attach the top plate. Then
install the complete assembly on the motherboard. See the following caution.
Caution
• Install or replace CPU module thermal pads that are missing or damaged. See the figures
below.
• Keep the CPU assembly flat while installing it. Press it down above the connectors at the right
end. Otherwise, you could damage the connectors.
• Install the two screws in diagonally opposite corners of the top plate.
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 IC, you must reprogram it. Hewlett-
Packard prefers that you program the IC with the latest BIOS—follow the directions carefully. You
can download it from the OmniBook website (see page vi).