I have a window AC unit, 115 VAC, 10 amps. Power went out earlier in the week due to the big storm on the east coast and once it came back on every LED on the control panel was lit (not typical) and would run for a few seconds once I turned it on before shutting off and wouldn't turn back on. My house is older and the only grounding provided by the outlet is contact with the mounting screw on the face plate. It has a GFI power cord that will reset and stay on test fine so there's nothing wrong with the outlet itself or the breaker, other devices plugged into the same socket work. The unit is only 2 months old and was working fine beforehand so I'm thinking any surge when the power came back on either blew a fuse or capacitor. I was able to remove the cover as much as GE wants the end user to be able to, but it only provided access to the PCB for the control panel and everything there seemed to be in working order. It seems that whatever potentially failed dangerous components on the compressor driver PCB are tucked further back in the unit that would require serious tear down.
It's a week until a repairman can come to inspect it for a $100 service call and whatever mark-up is on the replacement part. I was wondering if there's a likely culprit that failed that would only be a few bucks off of Digikey.