I wish you were not 100 miles away...
But then you did up the prize to a case of beer
If the outlet is good....it's probably some thing with you power feed...and or I have fixed many a printed circut board with just soldering a connection...when the main power feed to the boards get hot the solder gets loose and the vibration breaks the connection....
At this point you need to get into the electrics and poke around for a loose wire or ...smell the circut board too...if it's fried it will smell burnted...also with the unit plugged in give it the smack in the side test to see if that makes the power flicker meaning it's a loose connection...
I might have to make the drive and come claim that case of beer this weekend