HP Omnibook 900 Service Manual

HP OmniBook 900 Removal and Replacement 2-11
 7. For a 12-inch display, remove the LCD module.
  a. Remove the four screws holding the LCD module.
  b. Lift up the right edge of the LCD module about 90°.
  c. Using a small flat-blade screwdriver, insert the tip under the narrow end of the flex cable
connector—not the wide end—and twist the screwdriver to release the connector from the
LCD module.
 8. For a 13-inch display, remove the LCD module.
  a. Close, but don’t latch the display; then lift off the...

2-12 Removal and Replacement HP OmniBook 900
Reassembly Notes
 · For the 12-inch display, make sure the LCD module and flex cable have small foam pads present
to ensure good connections:
  Two pads on the back of the LCD module on the internal connections near the top-left and
bottom-left corners. If a pad is missing, replace the LCD module.
  One pad on the LCD flex cable behind the connector that plugs into the LCD module. If the
pad is missing, replace the flex cable.
 · For the 13-inch display, make...

HP OmniBook 900 Removal and Replacement 2-13
 
 
 Figure 2-7. Removing the Keyboard
Reassembly Notes
 · To connect the flex cables, lay the keyboard upside-down on the front section of the top case.
 · Fold the keyboard back into place. Slip its front tabs into the slots, then snap the back edge into
place.
 · Push the keyboard toward the back as you tighten the two screws. This helps engage the tab at the
back-center of the keyboard.
Keyboard
Keyboard-screw
cover
Screw, M2.5×4mm
Keyboard flex cable...

2-14 Removal and Replacement HP OmniBook 900
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...

HP OmniBook 900 Removal and Replacement 2-15
  Caution: OmniBook 900B
 
Follow these precautions to prevent damage to the CPU connector:
 ·  Use only a 4.0-4.5 mm flat-blade screwdriver to release the CPU.
 ·  Use only enough force to lock the CPU module. The CPU connector may be damaged if too
much force is used.
 
To reinstall the CPU assembly, see the precautions under “Reassembly Notes.”
 5. For the OmniBook 900B, insert the flat-blade screwdriver into the release slot of the CPU
socket, and then...

2-16 Removal and Replacement HP OmniBook 900
  Caution: OmniBook 900B
 
Follow these precautions while installing the CPU module to prevent damage to the CPU
connector:
 ·  Place the CPU module on the connector carefully. Align the arrow on the upper right corner of
the CPU module with the matching arrow on the connector.
 ·  Use only a 4.0-4.5 mm flat-blade screwdriver to lock the CPU module.
 ·  Use only enough force to lock the CPU module. The CPU connector may be damaged if too
much force is used....

HP OmniBook 900 Removal and Replacement 2-17
 
 
 Figure 2-9. Removing the Display Assembly
Reassembly Notes
 · For a 12-inch display, the flex cable wraps around the post only about 1/2 turn.
 · For a 12- or 13-inch display, insert the display power wires into the notch in the top case before
installing the hinge cover.
Hinge covers (2)
Display power cable
Screw, M2.5×4mm
Display flex cable
Screw, M2.5×8mm 

2-18 Removal and Replacement HP OmniBook 900
Removing the Top Case
(HP Authorized Service Providers Only)
Required Equipment
 · Small Phillips screwdriver.
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).
 3. Remove the eight screws (OmniBook 900†) or six screws and two springs (OmniBook 900B)
from the heatsink and lift off the heatsink....

HP OmniBook 900 Removal and Replacement 2-19
 
 
 Figure 2-10. Removing the Top Case
Reassembly Notes
  Note: Installing a New Top Case
 ·  Transfer the following items from the old top case to the new one:
 
Touch pad and support.
 
Left hinge support.
 ·  Press down on the touch pad support plate while sliding it into place. Make sure the support is
held down at its left and right edges. Check the action of the click buttons before installing the
top case.
 · Engage the tab at the front of the top...

2-20 Removal and Replacement HP OmniBook 900
  Note
 
For an OmniBook 900 with a 12-inch display and serial number before TW 92500000, 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...