I am having issues with this refrigerator. It quit cooling. At first it would quit and I would unplug it for a bit, plug back in and it would restart. That worked for a few weeks. Then totally quit. I ordered a new main board, installed it wit the same problem no start. I replaced the old board and did some testing. I tested the output from the board to the inverter board without the ground hooked up and got 5 volts. With the ground hooked up it was 1.5v. tested the compressor, 7 ohms across all points which is good. Which lead me to believe the inverter board was bad. Replaced the inverter board, still nothing. So I disconnected the ground from the main board, and she fired right up and is now getting cold. What do you think is going on here?