Dell Inspiron 3800 - Manual (Page 54)

To remove the microprocessor module, perform the following steps.
NOTICE: To avoid damaging the system board, the power cable, battery, and second battery (if installed)
must be removed before you service the computer.
1. Remove the main battery.
2. Remove the keyboard assembly .
NOTICE: To ensure maximum cooling for the microprocessor, do not touch the heat transfer areas on the
thermal cooling assembly (TCA). The oils in your skin reduce the heat transfer capability of the thermal
pads.
3. Remove the two 3-mm screws on the microprocessor shield that secure the thermal cooling assembly to the
microprocessor module (see Figure 12 ).
4. Loosen the three captive screws securing the microprocessor shield to the microprocessor module.
5. Remove the microprocessor shield.
6. Rotate the arm of the thermal cooling assembly up and away from the microprocessor module.
NOTICE: When removing the microprocessor module, pull the module straight up. Do not move the tool from side to
side to extract the processor board.
7. Use a microprocessor extractor tool to remove the microprocessor module.
The tool fits on the left side of the module aligned with white marks on the front and back edge of the
processor board (see
Figure 12 ).
Replacing the Microprocessor Module
NOTICE: Proper seating of the microprocessor module requires a considerable amount of force
(approximately 35 pounds [16 kilograms]) applied above the module connector. A microprocessor
module that is not properly seated can result in an intermittent connection and subsequent failures.
1. Align the microprocessor connector on the left side of the board and press down firmly on the metal plate that
is directly over the connector.
When the microprocessor module is seated, all four corners must be at the same height. If one or more
corners of the module are higher than the others, the module is not seated correctly.
2. To ensure the microprocessor module is fully seated, apply pressure directly over the corner without the
mounting screw hole.
3. Rotate the arm of the thermal cooling assembly into place.
4. Replace the microprocessor shield.
5. Replace the two 3-mm screws that secure the thermal cooling assembly arm and shield to the microprocessor
module.
1 Captive screws (3)
2 Thermal cooling assembly arm
3 Microprocessor module
4 White marks on the
microprocessor board
5 Microprocessor shield
6 3-mm screws (2)