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Display Assembly

Dell™ Latitude™ D420 Service Manual

  Removing the Display Assembly

  Removing the Display Bezel

  Removing the Display Panel

  Removing the Display-Panel Brackets

  Removing the Display Cable

  Removing the Display Latch

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer.

NOTICE: You must remove the display assembly before you remove the palm rest.

1. Follow the instructions in Before You Begin.
   
   
2. Remove the hinge cover (see Hinge Cover).
   
   
3. Remove the keyboard (see Keyboard).
   
   
4. Remove the internal card with Bluetooth® wireless technology (see Internal Card With Bluetooth® Wireless Technology).
   
   

Removing the Display Assembly

1. Remove the two M2.5 x 5-mm left and right hinge screws from the back of the computer.
   
   
2. Turn the computer upside down and remove the two M2.5 x 5-mm screws labeled "D" from the computer base.
   
   

1	M2.5 x 5-mm screws (4)

3. Remove the antenna cables from the WLAN and Mobile Broadband Mini-Cards, if applicable.
   
   
4. Turn the computer over topside up and open the display approximately 180 degrees so that it lies flat against your work surface.
   
   

NOTE: Ensure that any plastic sleeves that protect unconnected Mini-Card connectors do not slide off.

5. Carefully dislodge the Mini-Card antenna cables from their routing guides and pull the cables with their connectors through the system board so that they are clear of the computer base.
   
   
6. Pull on the display cable pull-tab toward the back of the computer to disconnect the display cable from the display connector on the system board.
   
   
7. Lift the display assembly away from the computer.
   
   

1

Mini-Card antenna cables

2

display cable

3

display assembly

NOTE: When you replace the display assembly, route the Mini-Card antenna cables through the system board and turn the computer upside down to connect the antenna cables to the Mini-Cards.

Removing the Display Bezel

1. Remove the six screw covers/bumpers and the six M2.5 x 4.2-mm shoulder screws from the display bezel.
   
   
2. Use your fingers to carefully separate the display bezel from the top cover.
   
   

1	screw covers/bumpers (6)	2	M2.5 x 4.2-mm shoulder screws (6)	3	display bezel
4	top cover

Removing the Display Panel

1. Remove the two M2 x 3-mm screws from the display panel.
   
   
2. Lift the display panel off the top cover.
   
   

1

M2 x 3-mm screws (2)

2

display panel

3

top cover

Removing the Display-Panel Brackets

1. Remove the four M2 x 3-mm screws (two on each bracket) from the display-panel brackets.
   
   

1

display-panel brackets (2)

2

M2 x 3-mm screws (4)

3

display panel

Removing the Display Cable

1	back of display-panel cable assembly	2	pull-tab on inverter connector	3	bottom flex-cable connector
4	top flex-cable connector

Removing the Display Latch

1	M2 x 3-mm screws (2)	2	screw holders (2)	3	display latch
4	metal plate	5	display base

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