A:Answer I was able to turn off everything except the illuminated letters "APC" on the top of the unit.
The manual's list of functions includes:
Function: Turn on/off the led lights
Timing: 6 seconds
Description: Press and hold the LED button to turn on/off the LED lights status (buzzer will beep when 6 seconds pass). The status will cycle through: Front and rear LED on - Front LED on, rear LED off - Front LED off, rear LED on - Front LED and rear LED off.
The manual didn't say anything about turning off the illuminated letters "APC" on the top of the unit. (I presume, but haven't tested, that when the unit is turned off, the letters won't be illuminated.)