HP Book 900 manual Removing the CPU Module

Removing the CPU Module

(HP Authorized Service Providers Only)

Required Equipment

∙Small Phillips screwdriver.

∙Small plastic blade for prying, such as an angled plastic tweezers (OmniBook 900† only).

∙Small flat-blade screwdriver: 4.0-4.5 mm blade (OmniBook 900B only).

Removal Procedure

Warning

Do not touch the heatsink until it has cooled. It could be hot if the computer was running recently.

1.Unplug the ac adapter, if present, and remove the battery.

2.Remove the keyboard (page 2-12)—but you don’t have to release the flex cables.

3.Remove the eight screws (OmniBook 900†) or six screws and springs (OmniBook 900B) from the heatsink and lift off the heatsink.

Caution

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

Caution: OmniBook 900†

Follow these precautions to prevent damage to the CPU connector:

∙Use only a non-metallic tool for releasing the CPU module. A metal tool may damage the motherboard.

Pry up at these two places.

∙Do not raise the front end or the CPU module higher than the back end during removal. To reinstall the CPU assembly, see the precautions under “Reassembly Notes.”

4.For an OmniBook 900† , to release the CPU module, at the side of the CPU module near the back-right corner, pry up the corner of the CPU module about 1-2 mm. Then pry up the back-left corner. Lift off the CPU module.

2-14 Removal and Replacement HP OmniBook 900