dishawcures,
Trying to add some logic to the problem at a high level.
1. Since you have a change in state, it's simply a control issue / setting and what is different from
the Colombo, which would initiate the program to go into reset. ie one works the other dosn't
/ software side of it
2. From an electrical point of view, the compressor kicks in maybe 1.5 to 2x of current draw,
so surge in the electrical field / noise / grounding / common circuits / feedback into the board
( mimic the compressor turning on such that you can deternine if it's a matter of intensity )
( swap the inputs from devices between boards )
Don't know if above makes any sense for you,
RICH