HP Omnibook 4000c Ct Service Manual

___________21 Hard Disk Drive
(End User Replaceable)
The Hard Disk Drive Module is user replaceable.
To remove the Hard Disk Drive Module, remove the screw under the latch on the
hard drive.  Push the Hard Drive Module Forward - do not pull on the latch - it is not
strong enough, use the back edge of the module in front of the depression in the
bottom case instead.
Reverse the procedure for installation.Figure 3 - Hard Disk Drive 

___________22 Small parts
(End User Replaceable)
The I/R lens, expansion door, I/O door,  Rubber feet, memory doors, and  PCMCIA
door are all replaceable.
The I/R lens snaps in and out from the inside of the I/O door.
To remove the I/O door, open it fully. Flex the door so that the center hinge
separates from the backcase. Continue to flex until side pins clear holes in back
case.  To reassemble, simply reverse the procedure.
The expansion door is removed by opening it fully and flexing it in the middle...

___________23 Icon Assembly and Display Module
(HP Authorized Support Providers Only)
To remove the display module on the OmniBook 4000C and CT  turn the unit over
and withdraw the two Phillips screws from the bottom back corners of the unit (see
diagram below).  This is not required if only the ICON assembly is to be removed.Display/ChassisScrewsFigure 4 - Display Screws 

___________24 Turn the unit right side up and remove the Icon assembly by placing the thumbs on
each edge of the assembly and pushing lightly (see diagram below).  The front
edge of the Icon Assembly will lift up slightly.Figure 5 - Icon Assembly 

___________25 Lift the display straight up about 1 inch.  The Icon Assembly will lift up with the
display.  Move the Icon assembly out of the way.  The cable from the Icon
Assembly to the PC board does not need to be removed if only the display is being
removed.  Otherwise, slide the connector sleeve foward to remove the Icon
Assembly cable.
Next, remove the two cables attaching the display module to the PC board.  Lastly,
remove the two screws attaching the grounding straps to the PC board.  The
display...

___________26 Palm Rest Assembly and Track Ball Assembly
(HP Authorized Support Providers Only)
Before removing the Palm Rest Assembly or Track Ball Assembly, the battery and
the floppy disk drive assembly (a second battery may be installed in to the floppy
drive bay)  must be removed.  See instructions for removal of these two modules.
In the floppy disk drive and battery bays are four Phillips screws, two in each bay.
Remove these four screws while the unit is upside down (see illustration below).Palm...

___________27 Turn the unit right side up, open the lid and lift up on the palmrest.  Disconnect the
cable attaching the palmrest to the track ball assembly.
To remove the track ball assembly, disconnect the Track Ball Assembly cable and
remove the one screw that holds the Track Ball Assembly in place.  The Track Ball
Assembly then lifts out.Palm Rest
AssemblyTrack Ball
AssemblyScrew ISOBM2.6x5LSub-BatteryAssemblyFigure 8 - Palm Rest and Track Ball Assemblies
Reverse the procedure to install a new Palm...

___________28 Keyboard Assembly
(HP Authorized Support Providers Only)
Required Equipment:
· Phillips Screwdriver
Components to Remove Prior to Keyboard:
1. HDD, FDD, and Battery
2. Palm Rest Assembly (may remain connected)
3. Sound Board (PCB Assy PK-688/PK-AUD) (partial removal)
Removal Procedure:
1. Follow the instructions for removing Battery, Floppy Disk and Hard Drive.
2. Follow the Palm Rest Assembly Removal Procedure.  Note the Track Ball does
not need to be removed and the Palm Rest may be...

___________29Figure 9 - Keyboard and Sound Board 

___________30 Power Board (PCA Assy PK-DC)
(HP Authorized Support Providers Only)
Required Equipment:
· Phillips Screwdriver
Components to remove prior Power Board (PCA Assy PK-DC):
1. HDD, FDD, and Battery
2. Palm Rest Assembly (may remain connected)
3. Keyboard (may remain connected)
Removal Procedure:
1. Remove Battery, Floppy Disk Drive, and Hard Disk Drive.
2. Follow the Palm Rest Assembly Removal Procedure to remove this component.
Note, the Palm Rest only needs to be lifted out; it may remain...