HP Omnibook Xe4500 Service Manual

HP Omnibook XE4100/XE4500 Removal and Replacement 2-27
Removing the Heatsink (with Fan)
(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 cover (page 2-10).
 • Switchboard PCA (page 2-13).
 • Keyboard (page 2-13).
 • Display assembly (page 2-17).
 • Top case (page 2-20).
 3. Remove all three retaining...

2-28 Removal and Replacement HP Omnibook XE4100/XE4500
 Caution
  Do not spin the fan blades with your finger, or you could damage the fan’s bearings.
Reassembly Notes
 • If the thermal pad is damaged, use a sharp knife or scraper to carefully remove it from the heat
sink, then attach a new thermal pad.
 • Install the heatsink screws in this order:
1. Install all three screws lightly.
2. Fully tighten the screws in the order marked on the heatsink. 

HP Omnibook XE4100/XE4500 Removal and Replacement 2-29
Removing the CPU Module
(HP Authorized Service Providers Only)
Required Equipment
 • Small flat-blade 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 cover (page 2-10).
 • Switchboard PCA (page 2-13).
 • Keyboard (page 2-13).
 • Display assembly (page 2-17).
 • Top case (page 2-20).
 • Heatsink (page 2-16).
 3. Turn the...

2-30 Removal and Replacement HP Omnibook XE4100/XE4500
Reassembly Notes
  Caution
 
Each time you install a new CPU module, you must also replace the heat sink’s thermal pad to
maintain optimum heat transfer. Use a sharp knife or scraper to carefully remove the old thermal
pad from the heat sink, then attach the new thermal pad.
 • The CPU module is keyed for installation, and can be inserted only one way.
 • Carefully insert the CPU module into the motherboard, and turn the lock screw one-half turn...

HP Omnibook XE4100/XE4500 Removal and Replacement 2-31
Removing the Motherboard
(HP Authorized Service Providers Only)
Required Equipment
 • Small Phillips screwdriver.
Removal Procedure
Note: Before Replacing the Motherboard
If possible, record the computer’s electronic serial number before you replace the motherboard. You
will then store the electronic serial number in the EEPROM on the new motherboard using the Service
Utility floppy disk.
1.  Download the service package for the Omnibook XE4100...

2-32 Removal and Replacement HP Omnibook XE4100/XE4500
  Caution: Wireless Models
 
Be careful when removing and attaching antenna cables. Damage to cables or connectors can
degrade performance.
 3. Wireless models only: Remove the mini-PCI door and unplug the two antenna cables from the
mini-PCI card. Do not remove the mini-PCI card at this time.
 4. Remove the four screws that attach the motherboard to the bottom case.
 5. From the back of the notebook, remove the six standoffs (two each from the...

HP Omnibook XE4100/XE4500 Removal and Replacement 2-33
Reassembly Notes
  Important
 
After replacing the display assembly or motherboard, you must use the Service Utilities floppy disk
to reprogram the EEPROM on the motherboard for the new display.
1.  Download the Omnibook XE4000 Series service package from the Partnership web site (see
page vii), and create a Service Utilities floppy disk as described in the package’s Readme file.
2.  Plug in an AC adapter.
3.  Insert the Service Utilities floppy disk...

2-34 Removal and Replacement HP Omnibook XE4100/XE4500
 1. Remove the following components from the old motherboard and install onto the new
motherboard:
 • CPU module
 • Wireless LAN mini-PCI card (if present)
 • SDRAM modules
 2. Follow the reassembly notes in the section entitled “Removing the Motherboard” on page 2-33.
Note: After Replacing the Motherboard
If present, insert the modem port cover into the modem port opening. Afterwards, you must use the
Service Utility floppy disk to store the system...

HP Omnibook XE4100/XE4500 Removal and Replacement 2-35
Replacing Components on a Bottom Case
Reassembly Procedure
 1. Transfer the plastic wireless panel, and if present, the docking port cover from the old bottom case
to the new bottom case.
 2. Install a new Microsoft Product ID label.
 3. Transfer the old serial number label and install a new overlay, or create a new serial number label
using the steps below.
 4. Follow the “Reassembly Notes” on page 2-33.
Installing a New Serial Number Label
Download...

2-36 Removal and Replacement HP Omnibook XE4100/XE4500
Replacing the Left and Right Antennas
If you need to remove or replace an antenna, see the figure below.
 Caution
  Handle the connector ends of the antennas carefully. Failure to do so could degrade notebook
performance.
  Handle the antenna routing metal tabs in the bottom case carefully. These tabs can be easily
broken.
 1. Carefully remove both antennas from the old bottom case.
 2. Route both antenna cables through the new bottom case as shown...