This reminds me of what my electrical engineering friend once did when his washing mashine stopped working. He got out his multimeter, opened up the back panel, and finally traced everything to an open circuit: the lid was open.
Ah, yes. I spent five or ten minutes this year examining a washing machine problem my wife reported. The problem: her husband had turned off the hot water feed while he tightened the connection, then had failed to run it back on. I believe she forgave him his negligence ...
