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Display

Dell™ Latitude™ C840 Service Manual

  Display Overview

  Hinge Cover

  Display Assembly

  Display Bezel

  Display Panel

  Display Latch

Display Overview

NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.

NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

1	display
2	hinge cover
3	M2.5 x 6-mm screws (3)
4	bottom case
5	display flex cable

Hinge Cover

1	hinge cover

1. Follow the instructions in "Preparing to Work Inside the Computer."
   
   
2. Use a nonmarring plastic scribe to loosen the hinge cover at the back and at each side of the computer.
   
   
3. Open the computer and use the scribe to pry between the key and the hinge cover until the hinge cover pops off.
   
   
4. Open the display and lift off the hinge cover.
   
   

Display Assembly

1	M2.5 x 6-mm screws (2)

1. Remove the hinge cover.
   
   

NOTICE: Remove the display flex cable before you remove the display assembly.

1	M2.5 x 6-mm screw
2	strain relief
3	display flex cable
4	pull loop

2. Remove the M2.5 x 6-mm flex-cable strain relief screw, and then use the pull loop to remove the display flex cable from the graphics card.
   
   

NOTICE: When reconnecting the flex cable, press down on both ends of the connector, not in the middle. Pressing the middle of the connector can damage fragile components.

3. Open the display and, from the back of the computer, remove the two M2.5 x 6-mm screws labeled "circle D" that secure the display assembly to the bottom case.
   
   
4. With the display in an upright position, lift the display assembly from the bottom case.
   
   

1	M2.5 x 4-mm screws (6)	8	M2 x 3-mm screws (6)
2	rubber screw covers (4)	9	top cover
3	display bezel	10	hinge cover
4	plastic tabs (6)	11	display flex cable
5	M2.5 x 4-mm screw	12	display panel
6	flex-cable mounting bracket	13	plastic screw covers (2)
7	display latch

Display Bezel

1. Use a scribe to pry out the four rubber screw covers located across the top of the bezel.
   
   
2. Remove the four M2.5 x 4-mm screws located across the top of the bezel.
   
   
3. Use a scribe at the indentations to pry out the two plastic screw covers located at the bottom of the bezel.
   
   
4. Remove the two M2.5 x 4-mm screws located at the bottom of the bezel.
   
   
5. Separate the bezel from the top cover.
   
   

The bezel is secured to the top cover with plastic tabs around the sides. Use a plastic scribe to help separate the bezel from the top cover.

Display Panel

Removing the Display Panel

1. Remove the hinge cover.
   
   
2. Detach the display flex cable from the strain relief and the graphics card.
   
   
3. Remove the display bezel.
   
   
4. Remove the M2.5 x 4-mm screw that secures the plastic flex-cable mounting bracket to the top cover.
   
   
5. Remove the six M2 x 3-mm screws (three on each side) from the right and left sides of the panel.
   
   
6. Lift the display panel and flex cable out of the top cover.
   
   
7. Disconnect the flex cable from the two connectors (one ZIF and one standard connector) on the display panel.
   
   

1	ZIF connector
2	standard connector

Replacing the Display Panel

NOTE: Use a magnetic screwdriver to reassemble the display panel in the display.

1. Connect the flex cable to the two connectors on the back of the display panel.
   
   
2. Place the display panel in the top cover, taking care that the flex cable is in place and is not crushed or crimped.
   
   
3. Reinstall the M2.5 x 4-mm screw that secures the flex-cable mounting bracket to the top cover.
   
   
4. Starting on the left side, use a magnetic screwdriver to reinstall the six M2 x 3-mm screws that secure the display panel in the top cover.
   
   
5. Reinstall the M2.5 x 6-mm flex-cable strain relief screw, and reconnect the flex cable to the graphics card.
   
   
6. Reinstall the display bezel.
   
   

Display Latch

1. Remove the hinge cover.
   
   
2. Detach the display flex cable from the strain relief and the graphics card.
   
   
3. Remove the display bezel.
   
   
4. Remove the display panel from the top cover.
   
   
5. Remove the display latch by disengaging the latch and captive spring.
   
   

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