(Updated on: 24 October 2013) Just recalled reading a question somewhere before — “Is turning off the Fligth Instrument Panel (FIP) possible?”
Yes, it’s possible by unplugging it from the USB socket.
I know it is not what the question really asks for. But truly, when the FIP is connected with electricity powered, there isn’t “A Switch” that one can turn off the FIP, unfortunately.
Well, for those who are using my C172 gauges, here’s an alternative: