Keyboard Assembly

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

NOTICE: Make sure that the work surface is clean to prevent scratching the computer cover.

Removing the Keyboard Assembly

1. Remove the main battery and secondary battery (if present).

2. Close the display assembly, and turn the computer upside down on a flat work surface.

Figure 9. Removing the Keyboard Assembly Screws

3. Remove the seven 10-mm screws, labeled with a "circle K," that secure the keyboard to the computer (see Figure 9).

4. Turn the computer right-side up and open the display.

NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time-consuming to replace. Be careful when removing and handling the keyboard.

5. Release the keyboard from the palmrest assembly by inserting a small flat-blade screwdriver under the edge of the blank key (see Figure 10), and lift the right edge of the keyboard.

Figure 10. Keyboard Assembly Removal

6. Lift the keyboard out of the palmrest.

7. Rotate the keyboard over the left edge of the computer (see Figure 11).

8. Rest the key face of the keyboard on the left side of the computer.

Figure H. Keyboard and Track Stick Cables and Connectors

9. Disconnect the keyboard cable from the connector on the system board. The keyboard cable is the wide, flexible cable.

10. Carefully disconnect the track stick cable from the ZIF connector on the palmrest's flexible printed circuit board.

11. Remove the keyboard assembly. Replacing the Keyboard Assembly

1. Place the keyboard on the left side of the computer with the keys face down (see Figure 11).

2. Connect the track stick cable to the ZIF connector.

Ensure that the contact side of this cable is face down when you insert the cable into the track stick ZIF interface connector.

3. Connect the keyboard cable to the connector on the system board.

Ensure that the contact side of this cable is face down when you insert the cable into the keyboard ZIF interface connector.

NOTICE: Position the track stick and keyboard cables so they are not twisted when you reconnect them to the system board.

4. Carefully turn the keyboard over and fit the keyboard into place.

Ensure that the track stick and keyboard cables are not twisted as you lower the keyboard into the palmrest.

5. To push the keyboard down, press on the blank key located below the right <Shift> key.

6. Check that the keyboard is correctly installed. The keys should be flush with the left and right surfaces of the palmrest.

7. Carefully turn the computer over and reinstall the seven 10-mm screws.

Start by installing the outermost screws on the left and right sides of the computer and then work inward to the center.

Microprocessor Module captive screws (3)

microprocessor shield

shield brace

(may not apply to your system)

captive screws (3)

microprocessor shield

shield brace

(may not apply to your system)

thermal cooling assembly arm

M2.5x4 M2.0x3

white marks on the microprocessor board (2)

microprocessor module

4 mm 3mm

Figure 12. Microprocessor Module Removal white marks on the microprocessor board (2)

microprocessor module thermal cooling assembly arm

M2.5x4 M2.0x3

4 mm 3mm

Figure 12. Microprocessor Module Removal

Removing the Microprocessor Module

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

1. Remove the main battery and secondary battery (if present).

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. 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 securing 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.

NOTE: The microprocessor shield brace may not be present on your system, if the brace is not present continue with step 6.

5. Remove the 4-mm screw that secures the microprocessor shield brace (see Figure 12).

6. Remove the microprocessor shield.

7. 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.

8. 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.

NOTICE: 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 fully seated, all four corners are aligned to 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 over the corner without the mounting screw hole.

NOTE: If your system uses a microprocessor shield with the brace as shown in Figure 12, the 4-mm screw used in step 6 secures this corner.

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.

6. Replace the 4-mm screw securing the shield brace (if present).

7. Tighten the three captive screws on the corners of the shield to secure the microprocessor module and shield (see Figure 12).

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