Quoted from PinMonk:Sounds like maybe those connectors may have been corroded from the old board and not replaced when the new board was put in, so corrosion inside the connectors and/or up the wires they connect to are causing intermittent breaks in the connection.
I'll look for the pics when you post them.
I had someone come take a look and it turns out it was actually a bad connection on the little circuit board in the front lower left of the cabinet. All is well again. Thank you very much for your advice.