HP Book 900 manual Removing the Motherboard or Bottom Case, Exchange Information

Note

For an OmniBook 900 with a 12-inch display and serial number before TW92500000, if the top case has been damaged by excessive pressure above the hard disk slot, check whether you must replace additional parts:

∙If the bottom case has a large blue pad that covers the bottom of the hard disk slot, and if the hard disk slot has a metal bracket across the top of the slot, replace just the top case.

∙If the bottom case has such a pad in the hard disk slot, but there is no metal bracket across the top of the slot, you should also install a HDD bracket above the hard disk slot.

∙If the bottom case does not have such a pad in the hard disk slot, it is an old bottom case, and you should also replace the bottom case and install a HDD bracket above the hard disk slot. (Service note 900-14.)

Removing the Motherboard or Bottom Case

(HP Authorized Service Providers Only)

Exchange Information

When returning a bad motherboard to HP, describe the symptoms on a piece of paper and attach it to the part—do not use tape.

Required Equipment

∙Small Phillips screwdriver.

∙4-mm thin-wall hex driver (or 5/32 inch). If necessary, grind the sides of a standard driver.

Removal Procedure

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

2.Remove these additional assemblies:

∙Hard disk drive (page 2-6).

∙Keyboard (page 2-12).

∙Display assembly (page 2-16).

∙CPU module (page 2-14).

∙Top case (page 2-18).

3.Remove the screw holding the right hinge support near the back-right corner, then lift out the support.

4.Remove the screw holding the front-left corner of the motherboard.

5.Unplug the speaker wire from the front of the motherboard.

6.Unplug the fan wire from the left side of the motherboard.

7.Remove the two screws from the PCMCIA socket.

8.Unplug the PCMCIA socket flex cable from the motherboard and lift out the socket.

9.Remove the four hex standoffs in the CPU area.

2-20 Removal and Replacement HP OmniBook 900