After all this, can you share if you used an Ohm meter to test that power switch? It seems to me that if you are that deep into computer repair you would have a basic tool to test the switch.

Also, your reset method is down right scary. It's not a method I've seen documented before and frankly sounds like desperation rather than what we've read in documents. Same goes for the freezer.

Tell the forum more about your electronics background and tools.
Bob