Installing The System Board - Dell Wyse 5470 Service Manual

Steps
1 Disconnect the speaker cable from the system board.
2 Open the latch and disconnect the CAC reader cable from the system board.
3 Open the latch and disconnect the power button board cable from the system board.
4 Disconnect the VGA daughterboard cable from the system board.
5 Peel the tape, open the latch, and disconnect the display cable from the system board
6 Open the latch and disconnect the I/O board cable from the system board.
7 Open the latch and disconnect the touch pad cable from the system board.
8 Open the latch and disconnect the keyboard cable from the system board.
9 Open the latch and disconnect the keyboard-backlight cable from the system board.
10 Remove the three (M2.5x5) screws that secure the right hinge to the system board, and palm-rest and keyboard assembly.
11 Lift the right hinge from the system board, and palm-rest and keyboard assembly.
12 Open the latch and disconnect the power adapter cable from the system board.
13 Remove the five screws (three M2x3 and two M2x2) that secures the system board to the palm-rest and keyboard assembly.
14 Loosen the captive screw (M2x3) that is marked as 6 on the heat sink.
15 Lift the system board with the heat sink off the palm-rest and keyboard assembly.
Next step
NOTE: To remove the heat sink from the system board, see

Installing the system board

Prerequisite
If you are replacing a component, remove the existing component before performing the installation procedure.
NOTE: To install the heat sink on to the system board, see
About this task
The following image indicates the location of the system board and provides a visual representation of the installation procedure:
48 Removing and installing components
Removing the heat sink.
Installing the heat sink.