Our club plane had new two G5s installed recently. They are supposed to turn on when the master comes on. There is no "boot time" if I recall correctly. One time during a night flight, neither of the G5s came on. It took about 5 minutes of random poking and turning before they lit up. I am confused if this had something to do with the night lighting (because it is on auto brightness mode), or a hardware issue, or if I was overlooking something since the G5 is a new thing for me. I do have a video of it, although it is not particularly clear due to the darkness in the cockpit. Any comments would be appreciated.