HP Omnibook 4100 4150 Service Manual

HP OmniBook 4100/4150 Removal and Replacement 2-9
Removing the Keyboard
(HP Authorized Service Providers Only)
Required Equipment
 · Small Phillips screwdriver.
 · Probe or tweezers.
Removal Procedure
 1. Unplug the ac adapter, if present, and remove the battery.
 2. On the bottom of the unit, remove the seven “K” screws from the bottom case.
 3. Insert your small finger into the PCMCIA opening and push up the top of the keyboard—or you
can lift it from above using a thin flat-blade screwdriver. After...

2-10 Removal and Replacement HP OmniBook 4100/4150
  Note
 
For an OmniBook 4100 with a serial number between TW 82000000 and TW 83599999, if the date
code on the bottom of the keyboard is “828”, replace the keyboard. (Service note 4100-02.)
 
F1460 and F1462 keyboards are not compatible with 4150B models. F1649 keyboards are
compatible with all models. See the table on page 5-6 for part numbers.
Reassembly Notes
 · To connect the larger keyboard flex cable, lay the keyboard flat on the top case slightly...

HP OmniBook 4100/4150 Removal and Replacement 2-11
Removing the Display Assembly
(HP Authorized Service Providers Only)
Required Equipment
 · Small Phillips screwdriver.
Removal Procedure
 1. Unplug the ac adapter, if present, and remove the battery.
 2. On the back of the unit, lift up on the VGA connector cover above the VGA port and unsnap it
from the case.
 3. Remove the screw above the VGA port.
 4. Remove the four “D” screws from the bottom case.
 5. Open the display about 90 degrees, then lift off...

2-12 Removal and Replacement HP OmniBook 4100/4150
Reassembly Notes
 · Before installing the display assembly, make sure a grounding spring is present in each hole at the
back corners of the left and right frames.
  Caution
 
Install new screws for all screws you remove that hold the display hinges. Otherwise, the hinges
could loosen over time.
 
Hint
 ·  W hile attaching the LCD flex cable to the base, rest one corner of the display on the bottom
case.
 · On the bottom case, the holes for the display...

HP OmniBook 4100/4150 Removal and Replacement 2-13
Removing the LCD Module
(HP Authorized Service Providers Only)
  Note
 
The exact details for removing the LCD module depend on the type of module. Some details may
differ from those described in this section.
 
See the table below for information about matching components for different types of LCD
modules.
 Table 2-7. Display Component Compatibility
LCD Type*13Samsung14 LG14 IBM74*14 IBM74E*
OmniBook Model410041004150†41004150†4150†
Bezel,...

2-14 Removal and Replacement HP OmniBook 4100/4150
Required Equipment
 · Small Phillips screwdriver.
 · Pointed knife or probe.
Removal Procedure
 1. Unplug the ac adapter, if present, and remove the battery.
 2. Remove the display assembly and strip cover from the unit (page 2-11).
 3. On the display bezel, remove the upper and lower screw covers (using a pointed knife or probe),
then remove the six screws.
 4. At the bottom of the display, lift up the inner edge of the bezel near both hinges until it...

HP OmniBook 4100/4150 Removal and Replacement 2-15
 
 Figure 2-7. Removing the LCD Module
Screw, M2.5×4mm (6)
Screw cover, upper domed (2)
Screw cover, lower flat (4)Display bezel
LCD module
Strip cover, hinges,
and hinge covers
Cable holderLED strip
cable LCD shield
LCD brackets,
left and right Screw (size depends
on LCD module)
LCD flex cable
Screw, M2.5×4mm (2)
Display case
Note:
14-inch LG display shown.
For a different display, the
LCD flex cable and other
details differ.
Cable holder cover
End cap...

2-16 Removal and Replacement HP OmniBook 4100/4150
Reassembly Notes
  Caution
 ·  Be sure to replace the LCD module or other display components with compatible parts.
Components may be damaged if compatible parts are not used. See the table on page 2-13.
 ·  At the lower-right corner of the LCD, reinstall protective tape if it was present on the original
LCD.
 ·  For an OmniBook 4150B, if you install a different type of LCD module, you must set the
switches on the VGA PCA according to the type of LCD...

HP OmniBook 4100/4150 Removal and Replacement 2-17
Removal Procedure
 1. Unplug the ac adapter, if present, and remove the battery.
 2. Remove these additional assemblies:
 · Floppy module or other module (page 2-3).
 · Hard disk drive (page 2-5).
 · Keyboard (page 2-9).
 · Display assembly and strip cover (page 2-11).
 3. Remove the grounding springs from the back corners of the left and right frames.
 4. On each of the front corners of the case, do the following:
 · Slide the module latch slider...

2-18 Removal and Replacement HP OmniBook 4100/4150
Reassembly Notes
 · Position the speaker on the pins on the bottom case before you install the speaker cover.
 · If the slider came off the module latch, attach it to the latch before you install the speaker cover.
 
Hint
 
On the bottom case, the holes for the top case screws are unmarked. The hole recesses have flat
bottoms for the 16-mm T-head screws and tapered bottoms for the longer 19-mm flathead
screws.