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HP OmniBook 900 Removal and Replacement 2-29
Component Removal Procedures Additional Steps (See figure on page 4-2)
Heatsink
Keyboard (page 2-12). Remove the eight screws (OmniBook 900†) or six
screws and two springs (OmniBook 900B) from the
heatsink and lift off the heatsink.
Reassembly Notes: Install new thermal pads on the
new heatsink.
IC, BIOS
See page 2-23.
Insulator, bottom case
Hard drive (page 2-6).
Keyboard (page 2-12).
Display (page 2-16).
CPU (page 2-14).
Top case (page 2-18).
Motherboard (page 2-20).
Lift the sheet out of the bottom case.
Reassembly Notes: The small pads on the sheet face
upwards.
Lens, infrared
Hard drive (page 2-6).
Keyboard (page 2-12).
Display (page 2-16).
Top case (page 2-18).
Slide the infrared lens out of the bottom case.
Pads, thermal
Keyboard (page 2-12). 1. Remove the eight screws (OmniBook 900†) or six
screws and two springs (OmniBook 900B) from the
heatsink and lift off the heatsink.
2. Install or replace damaged or missing thermal pads
on the bottom of the heatsink.
3. Clean off the mating surfaces of the CPU module
and the large IC next to it.
Reassembly Notes: Install the smaller pad in the
recessed area of the same shape.
Install the larger pad in the middle of the protruding
area.
PCA, motherboard
See page 2-20.
Socket, PCMCIA
Keyboard (page 2-12). 1. Remove the eight screws (OmniBook 900†) or six
screws and two springs (OmniBook 900B) from the
heatsink and lift off the heatsink.
2. Remove the two screws from the right side of the
PCMCIA socket.
3. Unplug the PCMCIA socket flex cable from the
motherboard and slide out the socket.
Speaker
(12-inch display)
Hard drive (page 2-6).
Keyboard (page 2-12).
Display (page 2-16).
Top case (page 2-18).
1. Unplug the speaker from the motherboard.
2. Peel off the covering from the speaker chamber.
3. Pull the speaker out of the bottom case.
Reassembly Notes: Make sure the foam pads are
attached to the edges and back of the speaker.
After inserting the speaker, carefully seal the speaker
chamber with the new covering material.
Speaker
(13-inch display)
Hard drive (page 2-6).
Keyboard (page 2-12).
Display (page 2-16).
CPU (page 2-14).
Top case (page 2-18).
Motherboard (page 2-20).
Pull the speaker out of the bottom case.
Support, hinge (left)
Hard drive (page 2-6).
Keyboard (page 2-12).
Display (page 2-16).
Top case (page 2-18).
Unsnap the left hinge support from the top case.