synchro
Senior Member
- Location
- Chicago, IL
- Occupation
- EE
Loose wire or a defective switch to where the slightest vibration closes a circuit.
Which is much more likely to happen with an electronic control board that a simple mechanical relay.
Yes. And it may be a cold solder joint or cracked trace on a circuit board on a very low level control circuit, perhaps even a digital circuit or a related interface. The fact that it now goes through some sort of sequence when plugged that it didn't before suggests that there could be a defect in an electronic control circuit.