It's crazy. I do get 120 at board, I'm sorry I may of made my description confusing. I did not check for 120 at inverter as I just wanted to check for signal.
I have seen these Sasmungs accidently put in demo mode and I saw the lights and told the cutomer this should be an easy fix.
forty minutes later I was still behind the fridge tracing wires.
I know I it's odd that even if it's not in demo mode, that I can't get it in demo mode. So just the fact that the input does nothing at 3 mississippi or 8 mississippi lets me know I have a control issue. I can verify that the front buttons do all work. But the display is telling me it's in demo mode.
Okay, I feel confident I will get the main board. I can get the inverter locally so no problem there if it's bad too, but I suspect it's not. Now if the fans were coming on and then no compressor I would suspect the inverter, but I have no fans and no inverter and was thinking maybe the voltage inverter on the main board is bad so I have no DC>