Dell Inspiron 7500 Removing And Replacing Parts Manual

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To disconnect a cable from a ZIF connector, perform the following steps:
1. Insert a small flat-blade screwdriver or dental pick under the movable part of the 
connector.
For most ZIFs, carefully pry up one end of the movable part of the connector and 
then the other end. Some ZIFs may need to be lifted in the center.
2. Pull up gently on the movable part of the connector until the cable is released.
3. Grasp the cable and pull it out of the connector.
To reconnect an interface cable to a ZIF connector, perform the following steps:
1. Use the flat-blade screwdriver or dental pick to open the movable part of the ZIF 
connector.
2. Orient the end of the cable with the ZIF connector, and insert the end of the 
cable into the connector.
3. While holding the cable in place, close the ZIF connector.
To ensure a firm connection, make sure the ZIF connector is completely closed.
Thermal Shield and Internal Modem 
Removal
The thermal shield (see Figure 18) ser ves as a heat shield for the system board, as 
well as an electromagnetic interference (EMI) fence for the processor board. 
						

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Figure 19.  Thermal Shield/Internal Modem Components 
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. 1Right hinge cover
24-mm screws (4)
3Thermal shield
4Palmrest assembly
5K-head 4-mm screw (1) 
						

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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 proces-
sor 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. 
						

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Heat Exchanger/Fan Removal
Figure 20.  Heat Exchanger/Fan Components
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.1Cable
2Fan
3Heat exchanger
45-mm screws (2) 
						

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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 con-
nector 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.
Processor Board Removal
Figure 21.  Processor Board Components
1Processor board
25-mm screws (3) 
						

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This procedure assumes that you have removed the heat exchanger/fan. To remove 
the processor board (see Figure 20), perform the following steps:
1. Remove the three 5-mm screws securing the processor board to the system 
board.
2. Gently pull the processor board off of connector JP15 on the system board. Do 
not rock the board to remove it, because this may damage the connectors.
When reinstalling the processor board, align the board with the notch on the system 
board connector. Press down on the left side of the board over the system board con-
nector. This is the best spot to apply pressure to seat the processor correctly on 
connector JP15.
LCD Removal
Figure 22.  LCD Components 
1LCD wire harness
2Connector JP3 
						

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To remove the liquid cr ystal display (LCD) panel (see Figure 21), perform the following 
steps:
1. Remove the left hinge cover.
2. Disconnect the LCD wire harness from connector JP3 on the system board.
Remove the two Phillips screws on the LCD wire harness on the JP3 connector. 
Use a dental pick or flat-blade screwdriver to pry up each end of the connector to 
release it.
3. Close the display.
4. Remove the four 6-mm screws that secure the two hinges to the hinge saddle 
extensions.
5. Unlatch the display and lift the assembly off the computer base.3Hinge saddles (2)
4Hinges (2)
56-mm screws
6Left hinge saddle 
						

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Palmrest Component Assembly
Figure 23.  Exploded View of Palmrest Assembly
1Display latch
2Touch pad
3Touch pad bracket
4Right speaker
5Hard-disk drive heat shield
6Touch pad button board 
						

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7Left speaker cover
8Speakers (2)
9Speaker wiring harness
10Display latch
11Palmrest
12IR board 
						

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Palmrest Assembly Removal
Figure 24.  Palmrest Assembly Components
1LED cable
26-mm screws (4)
3LED connector
4DC-DC board
5Batter y bay