Dell Inspiron 3800 User Manual download pdf (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.

Captive screws (3)

Thermal cooling assembly arm

Microprocessor module

White marks on the

microprocessor board

Microprocessor shield

3-mm screws (2)

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Dell Inspiron 3800 User Manual Page 54