The Mac Mini should be left plugged in separately from the cabinet and left on whenever possible. Manual reboot using the power button is NOT recommended. The Mac Mini is scheduled to reboot at midnight every night.
If the Mac Mini needs to be shut down prior to a scheduled reboot, you can either:

HDMI Audio Extractor
If there is a problem, the backup media player should be used while the Mac Mini is left on (see Using the Back-Up USB ) . If the problem persists after the next scheduled reboot, connect a keyboard, mouse, and monitor to the Mac Mini and clear any errors if possible and do a restart using the Finder. If the problem continues, contact [email protected] and make sure that the Mac Mini is connected to the internet.

Cabinet Power Switch

Switch for Top LCD
The components in the cabinet (besides the Mac Mini) can be switched on and off whenever needed using the lit power switch in the rack-mounted power strip at the rear of the cabinet. The top LCD is always on when plugged in and receiving power from the the rack-mounted power strip.
The Top LCD doesn’t have an easily accessible power switch. The Top LCD can be turned on and off with the rest of the components using the main power strip switch at the rear of the cabinet. To turn the top LCD off independently of the rest of the cabinet there is a switch installed on the plug at that the LCD panel is connected to. It is marked with orange tape.
The 5” monitors, the 9” monitors, and the television should all be left “on”. The monitors have LEDs that indicate whether or not the power is on and may be turned on by pressing the power button. The television’s “Volume” button turns the TV on with a short turn. A “click” indicates that it’s on and the screen should illuminate or at least crackle a little when lighting up. If the brightnest and/or contrast knobs have been messed with, the screens might not appear to be working. Wiggle those knobs to see if there is a change in the image.
All of the rest of the components plugged into the cabinet should start up immediately when the power switch on the rack-mounted power strip is flipped.