Component

DC-DC PCA

Fan

Caution: Do not spin the fan blade with your finger. Pressure on the fan blade can damage the bearings.

Frame, Left

Frame, Left or Right

Heatsink Parts

(OmniBook 4100/4150†)

Caution: For the OmniBook 4100, the finned heatsink and heatsink cover must match the screw size (M2 or M3).

Heatsink/Top Plate (OmniBook 4150B)

IR PCA

LVDS PCA

(not present in OmniBook 4150B)

Removal Procedures

Plug-in module (page 2-3). Hard drive (page 2-5). Keyboard (page 2-9). Display (page 2-11).

Top case (page 2-16).

Keyboard (page 2-9). Display (page 2-11).

Plug-in module (page 2-3). Hard drive (page 2-5). Keyboard (page 2-9). Display (page 2-11).

Top case (page 2-16).

Plug-in module (page 2-3). Hard drive (page 2-5). Keyboard (page 2-9). Display (page 2-11).

Top case (page 2-16).

Keyboard (page 2-9). Display (page 2-11).

Keyboard (page 2-9).

Display (page 2-11).

Keyboard (page 2-9). Display (page 2-11).

Additional Steps (See figures on pages 4-2, 4-8)

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.Unplug the fan cable from the motherboard.

2.Remove the screw from the plastic cover. On an OmniBook 4150B, remove the other screw holding the fan.

3.Lift out the cover and fan - they are a single assembly on an OmniBook 4150B.

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

1.Remove the 1 or 2 screws holding the heat exchange cover/fan.

2.Lift off the cover/fan and move them aside.

3.For a 2-screw CPU top plate, remove the screw from the heatsink cover and remove the cover.

4.Remove the 2 or 5 screws from the CPU top plate and remove the top plate.

5.Remove the screw holding the frame to the motherboard and remove the frame.

1.Remove the screw holding the IR PCA to the frame and move the PCA aside.

2.Remove the two screws holding the frame and remove the frame.

∙Heat exchange cover: Remove the screw from the plastic cover and remove it from the frame.

∙Heatsink cover (present only on an OmniBook with a 2-screw CPU top plate): Remove the screw from the cover and remove it from the heatpipe.

∙Finned heatsink: Remove the top case (page 2-16). Remove the screw holding the heat exchange cover to the frame and remove the cover. Lift off the fan and move it aside. For a 2-screw CPU top plate, remove the screw and heatsink cover. Remove the 2 or 5 screws from the CPU top plate and remove the top plate. Remove the screw from the left frame and lift off the frame. Then lift out the finned heatsink.

Remove the 5 screws from the heatsink/top plate and lift it off.

Remove the screw from the IR PCA, then unplug the cable from the motherboard.

Use a probe to unplug the LVDS PCA from the VGA PCA.

Caution: The LVDS PCA must be compatible with the LCD module. See the compatibility table on page 2-13.

2-34 Removal and Replacement

HP OmniBook 4100/4150