compaq presario 2100 series mobile pc User Manual

 
 
 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. 
Service Manual Removal and Replacement 2-27  

 
Removing the CPU Module 
(Authorized Service Providers Only) 
Required Equipment 
• Small flat-blade screwdriver. 
Removal Procedure 
1. 
2. 
Unplug the AC adapter, if present, and remove the battery. 
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). 
2-28 Removal and Replacement Service Manual  

 
3. Turn the lock screw one-half turn counterclockwise to release the CPU module (you should hear a 
light snap). Carefully lift the CPU module off of its socket on the motherboard. 
  
 
IMPORTANT: See th
Caution on the nex
page before 
reinstalling the CPU 
module! 
e 
t 
Figure 2-17. Removing the CPU Module 
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...

 
Removing the Motherboard 
(Authorized Service Providers Only) 
Required Equipment 
• #1 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 notebook service package from the Partnership Web site (see page vi), and 
create a Service...

 
Caution: Wireless Models 
Be careful when removing and attaching antenna cables. Damage to cables or connectors can 
degrade performance. 
 
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. 
3. 
4. 
5. 
6. 
7. 
8. 
Remove the four screws that attach the motherboard to the bottom case. 
From the back of the notebook, remove the six standoffs (two each from the external monitor port, 
serial port, and...

 
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 notebook Series service package from the Partnership Web site (see page vi), 
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 in the floppy drive. If the unit has no internal floppy...

 
1. 
2. 
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 
Follow the reassembly notes in the section entitled “Removing the Motherboard” on page 2-32. 
 
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 data and display information in the EEPROM on...

 
Replacing Components on a Bottom Case 
Reassembly Procedure 
1. 
2. 
3. 
4. 
1. 
2. 
3. 
4. 
5. 
Transfer the plastic wireless panel, and if present, the docking port cover from the old bottom case 
to the new bottom case. 
Install a new Microsoft Product ID label. 
Transfer the old serial number label and install a new overlay, or create a new serial number label 
using the steps below. 
Follow the “Reassembly Notes” on page 2-32. 
Installing a New Serial Number Label 
Download the latest version of...

 
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. 
2. 
Carefully remove both antennas from the old bottom case. 
Route both antenna cables through the new bottom case as shown below. Make sure you leave 
enough room at the...

 
Repairing the BIOS IC 
(Authorized Service Providers Only) 
The notebook’s BIOS IC cannot be replaced separately. If it is defective, you must replace the 
motherboard. In some cases, however, you might be able to reprogram a malfunctioning BIOS IC using 
either e-DiagTools for Windows, a BIOS floppy disk, or a Crisis Recovery floppy disk. 
If the notebook will boot sufficiently, use e-DiagTools for Windows or a BIOS floppy disk to 
reprogram the BIOS IC. If you cannot boot the notebook adequately, use...