Thermal Shield and Internal Modem Removal

The thermal shield (see Figure 18) serves as a heat shield for the system board, as well as an electromagnetic interference (EMI) fence for the processor board.

Figure 19. Thermal Shield/Internal Modem Components

1

Right hinge cover

2

4-mm screws (4)

3

Thermal shield

4

Palmrest assembly

5

K-head 4-mm screw (1)

This procedure assumes that you have removed the keyboard. To remove the thermal shield, perform the following steps:

1. Remove the right hinge cover.

15-Inch XGA and 15-Inch SXGA+ LCD Panels a. Open the computer to 170 degrees, supporting the display assembly.

b. From the outside edge of the unit, carefully insert a flat-blade screwdriver or scribe into the space on the inside of the hinge cover.

c. Bring the tool against the front wall of the hinge cover and pull toward the keyboard to loosen the plastic snaps at the back of the hinge cover.

d. Move the tool to the inside top of the hinge cover and lift the hinge cover off. If the hinge covers are tight, use a plastic wedge or scribe to loosen and pop them off.

15.4-Inch SXGA LCD Panel

Remove the screw cover and the screw. Lift the hinge cover off.

2. If your computer has an internal modem, disconnect the twisted wire pair from connector JP2 on the RJ-11 card.

3. Remove the twisted wire pair from under the tabs in the thermal shield.

4. Bend the cables back over the palmrest assembly to move them out of the way of the thermal shield.

5. Remove the three flat-head 4-mm screws and the one K-head 4-mm screw securing the thermal shield.

Note that the K-head screw is leftmost and is thicker than the other three.

6. Remove the thermal shield from the palmrest assembly.

Note that the bottom of the shield has an EMI fence that surrounds the processor board.

To remove the internal modem card, perform the following steps:

1. Gently pull the modem card off of connector JP19 on the system board. Do not rock the card to remove it, because this may damage the connectors.

2. Remove the carrier tray by sliding it toward the back of the computer.

3. Remove the modem card from the carrier tray.

Heat Exchanger/Fan Removal

Figure 20. Heat Exchanger/Fan Components

1 Cable

2 Fan

3 Heat exchanger

To remove the heat exchanger/fan (see Figure 19), perform the following steps:

1. Remove the two 5-mm screws securing the heat exchanger.

2. Disconnect the fan cable from connector JP17 on the system board.

3. Remove the heat exchanger/fan.

4. Inspect the two thermal pads on the bottom of the heat exchanger and replace them if necessary.

To remove the heat exchanger/fan without removing the palmrest assembly, perform the following steps.

1. Remove the two 5-mm screws securing the heat exchanger.

2. Disconnect the fan cable from connector JP17 on the system board.

3. Lift the heat exchanger and rotate it upward.

4. Slide the heat exchanger/fan toward the front of the computer until the fan is completely clear of the overhanging palmrest plastic.

5. Lift the heat exchanger/fan out at an angle.

6. Inspect the two thermal pads on the bottom of the heat exchanger and replace them if necessary.

When reinstalling the heat exchanger/fan, be sure to reconnect the fan cable to connector JP17 on the system board; if you have an internal modem, there is an identical connector (JP2) next to JP17 The modem connector is color-coded red.

The Ultimate Computer Repair Guide

The Ultimate Computer Repair Guide

Read how to maintain and repair any desktop and laptop computer. This Ebook has articles with photos and videos that show detailed step by step pc repair and maintenance procedures. There are many links to online videos that explain how you can build, maintain, speed up, clean, and repair your computer yourself. Put the money that you were going to pay the PC Tech in your own pocket.

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