Dell PowerEdge R415 Owner's Manual page 136

6 Gently work the connector out of the socket.
7 For LCD control panel, disconnect the display module cable from the
control panel board. See Figure 3-29.
8 Remove the two screws that secure the control panel board to the system
chassis and remove the board.
This completes the removal for LED control panel.
9 To remove the display module, use a knife or a small flat-blade screwdriver,
and insert the blade beneath the front panel of the display and slide the
blade across the bottom to lift the panel outward. See Figure 3-29.
10 Bend the panel upward to allow access to the mounting screws.
11 Remove the two screws that secure the display module to the system
chassis.
12 Remove the display module from the chassis cutout.
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Installing System Components