Component

CPU Bottom Plate

CPU Module (MMO)

CPU Top Plate

DC-DC PCA

Fan

Removal Procedures

Keyboard (page 2-8).

Keyboard (page 2-8).

Keyboard (page 2-8).

Plug-in module (page 2-3). Hard drive (page 2-5). Keyboard (page 2-8). Display (page 2-10).

Top case (page 2-14).

Keyboard (page 2-8). Display (page 2-10).

Additional Steps (See figures on pages 4-2, 4-6)

1.Remove the screw from the heatsink cover and lift it off the heatpipe.

2.Remove the screws from the CPU top plate, then lift the right half of the complete CPU assembly so it unplugs from the motherboard.

3.Slide off the top plate, then remove the CPU module from the bottom plate.

Reassembly Notes: Assemble the CPU module, top plate, and bottom plate before installing them on the motherboard.

Caution: Keep the CPU assembly flat while installing it. Press it down above the connectors at the right end. Otherwise, you could damage the connectors.

1.Remove the screw from the heatsink cover and lift it off the heatpipe.

2.Remove the screws from the CPU top plate, then lift the right half of the complete CPU assembly so it unplugs from the motherboard.

3.Slide off the top plate, then remove the CPU module from the bottom plate.

Reassembly Notes: Assemble the CPU module, top plate, and bottom plate before installing them on the motherboard.

Caution: Replace the CPU module with one of the same module type—see the table on page 4-3.

Caution: Install or replace CPU module thermal pads that are missing or damaged—see the picture on page 2-19.

Caution: Keep the CPU assembly flat while installing it. Press it down above the connectors at the right end. Otherwise, you could damage the connectors.

1.Remove the screw from the heatsink cover and lift it off the heatpipe.

2.Remove the screws from the CPU top plate and remove the top plate.

Caution: Replace the top plate with one that is compatible with the CPU module—see the table on page 4-3.

1.Remove the screw from the IR PCA and move the PCA aside.

2.Remove the two screws from the right frame and remove the frame.

3.Unplug the DC-DC PCA.

1.Remove the screw from the plastic cover and remove the cover.

2.Unplug the fan cable from the motherboard and lift out the fan.

Reassembly Notes: Route the fan wires at the bottom of the opening next to the motherboard.

2-24 Removal and Replacement

HP OmniBook 4100