Power off the Enterprise system.
See the power off instructions in Chapter 11, Powering Off and On .
Remove the key from the key switch.
Remove the top front panel by grasping the bezel on both sides and pulling the bezel away from the ball studs (Figure 12-1).
Remove the left side panel.
See Chapter 12, Preparing for Service, for instructions.
Disconnect the power and data cable assemblies from the back of the media tray.
Remove the two screws that attach the media tray to the flange on the side of the fan tray shelf (Figure E-7).
Disconnect the power cable from the fan in the media tray.
Disconnect the keyswitch cable.
Loosen and remove the tie wrap from fan cable.
Remove the two screws (Figure E-8) that hold the media tray.
Remove the media tray and set it aside.
Disconnect the cable from the back of the key switch assembly.
Remove the screw on the left side that attaches the key switch assembly to the cabinet pillar (Figure E-9).
Remove the two screws on the right side that attach the key switch assembly to the cabinet pillar.
You can access the two screws through the space previously occupied by the media tray (Figure E-10).
Carefully remove the key switch assembly from the cabinet.
Pull out the right side first and gently rock the assembly until the left flange clears the cabinet (Figure E-11).