I have an Aeroforce Interceptor Gauge (Gen1 IIRC) and its having issues powering up

The issue i'm having is that the gauge has a mind of its own basically, sometimes it turns on by itself and it also turns of by itself, sometimes if you tap the gauge it turns on, the wiring is good now, thanks to Jordon! now just have to figure out the rest...

Jordon (Mad Monkey) helped out quite a bit, checked the gauge and everything in the gauge looked okay, everything was intact

I would really like to have the gauge working
any suggestions of what i should do? what i should look for? any help is appreciated

TIA
-Mike