HP Omnibook 300 425 430 530 Service Manual

55 
3. Remove the I/O Door and the four standoffs located on the I/O backplane (see figure below).
4. Two flat tip screwdrivers, or similar prying devices, are needed to remove the Top Case and
Display Assemblies.  Four plastic tabs hold the Top Case and Bottom Case together.  Two
tabs are located in each PCMCIA slot (see below illustration).  Note, the screws seen in the
PCMCIA slot do not need to be removed.Figure 10 - Backplane StandoffsFigure 11 - Bottom Case Tabs 

56Place a prying device at a tab location between the metal and plastic of the Bottom Case
(see figure below, left).  Place another prying device in the PCMCIA eject button (see figure
below, right).  To release the tab, simultaneously twist prying device A while lifting on prying
device B.  Use caution with this maneuver, as the plastic tabs can break off the Bottom
Case.  If this occurs, the Bottom Case must be replaced.
5. Perform step four for each of the four tabs.
6. Once the Bottom Case tabs are...

57 
8. With the separation increased slightly, the display cable can be disconnected using a probe.
Use caution to keep the OmniBook on a level surface.  With the Top Case partially
separated, small internal parts may dislodge when the OmniBook is tilted at a sharp
angle.  Place the probe at the base of the display cable connector between the two rows of
pins.  Use a rocking motion to lift the cable from the connector.  See the below illustration for
proper placement of the probe.
9. With the display...

5810. To separate the Keyboard from the Display, five grounding eyelets must be removed from
the display posts (see below illustration).  Use caution when removing the grounding
eyelets, as they can be broken off easily.  If this happens, the assembly must be
replaced.  To prevent the eyelets from breaking, bend the grounding eyelet tabs at the
farthest point from the eyelet.Figure 15 - Keyboard Flex CablesFigure 16 - Display Grounding EyeletsProper Tab Bend 

59 
11. To remove the Display from the Top Case, the display cable and two grounding cables must
be guided through the holes in the Top Case.
Replacement Procedure
1. Guide the display posts, display cable and two grounding cables on the Display through the
holes in the Top Case.
2. Replace the grounding eyelets over the display posts (see Figure 16). Use caution when
replacing the grounding eyelets, as they can be broken off easily.  If this happens, the
assembly must be replaced.
3. Press the Display...

605. To reconnect the display cable, position a probe in the cable as shown in the below
illustration.
 
6. Use the probe to connect the display cable into the connector as shown below. Use caution
to keep the OmniBook on a level surface.  With the Top Case partially separated,
small internal parts may dislodge when the OmniBook is tilted at a sharp angle.
 
 
 
 
 
7. With the display cable reconnected, the I/O grounding eyelets must be slid into place.  Use
caution when positioning the I/O grounding...

618. Open the display and firmly press the Top Case and Bottom Case together around the entire
parameter of the OmniBook.  This will lock the tabs of the two cases.
9. Replace the seven screws and four standoffs and the remainder of the components.Figure 19 - I/O Port Eyelets (all present)Figure 20 - I/O Port Eyelets (two matched sets)Figure 21 - I/O Port Eyelets (only one matched set)Figure 22 - I/O Port Eyelets (no eyelet in position one)Acceptable to reassemble
All eyelets are present.Acceptable to...

62Keyboard
(HP Authorized Service Providers Only)
Required Equipment
· Appropriate ESD station
· Torx #6 screwdriver
· Two small flat tip screwdrivers (or similar prying devices)
· Probe
Removal Procedure
1. Follow the Display Removal Procedure to separate the Display and Top Case from the
Bottom Case.
2. Once the Display is removed, the Keyboard must now be separated from the Top Case.
Hold the Top Case and Keyboard Assembly exactly as shown in the below illustration.
3. Apply even upward pressure with...

63Logic PCA Board
(HP Authorized Service Providers Only)
Required Equipment
· Appropriate ESD station
· Torx #6 screwdriver
· Two small flat tip screwdrivers (or similar prying devices)
· Probe
Removal Procedure
1. Follow the Display Removal Procedure to separate the Display and Top Case Assembly from
the Bottom Case.
2. Remove the Eject Arms (both right and left) and Mouse Button Latch and Spring (see below
illustration).  Note, the Mouse Latch Spring is very small and can be misplaced easily.
 
 Figure...

643. The Eject Buttons and Springs do not need to be removed to gain access to the Logic Board.
However, because they can be dislodged easily, setting them aside is recommended.
4. Remove the Paw Carrier Flex Cable from the zero-force insertion slot.
5. Remove the five (5) screws from the Logic Board (see previous illustration).
6. The Logic Board can now be lifted from the Bottom Case.
Replacement Procedure
1. To replace the Logic Board, reverse the steps in the Removal Procedure.  Ensure the Paw...