Dell L400 service manual Remove the keyboard bezel

2.Remove the keyboard bezel.

3.Remove the display assembly.

4.Remove the display assembly bezel.

5.Remove the four M2 x 3.5-mm screws on the left and right sides of the display assembly that secure the LCD panel to the top cover (see Figure 11).

6.Remove the M2 x 3.5-mm screw that secures the inverter to the top cover.

7.Lift and roll the inverter over (toward you), so the bezel side is down and the connector side is up (see Figure 11).

8.Disconnect the narrow flex cable from the ZIF connector on the left side of the inverter.

9.Disconnect the two-wire back-light plug from the connector on the right side of the inverter (see Figure 11).

10.Remove the inverter.

11.Lift the LCD panel from the bottom edge, giving enough room to fit your hand between the LCD panel and the top cover.

12.Carefully peel the LCD flex cable away from the top cover.

13.Lift the LCD panel out of the top cover.

14.Lift up on the tape that is covering the wide flex-cable connector on the back of the LCD panel.

NOTE: Keep the tape for when you replace the LCD panel.

15.Disconnect the wide flex cable from the connector on the back of the LCD panel.

To replace the LCD panel, perform the following steps:

1.Connect the LCD flex cable to the connector on the back of the LCD panel.

2.Reinstall the tape that covers the LCD flex-cable connector on the back of the LCD panel.

3.If you are installing a new LCD flex cable, peel off the backing tapes that are on the LCD flex-cable EMI sponges.

4.Reinstall the LCD panel in the top cover.

a.Holding the LCD flex cable against the back of the LCD panel, insert the right edge of the LCD panel into the right end of the top cover.

The right edge of the LCD panel should press against the EMI sponge on the right side of the top cover. The LCD panel should not rest on top of the EMI sponge.

14 Dell Latitude L400 Service Manual