Have experienced this problem before, so knew how to diagnose and repair. Ordered the kit, pulled the unit out, replaced it, and replaced the unit in the cabinet. Boom. Would not turn on. Diagnosed that problem to the power cord which had bent 90 degrees against the back wall and was frayed inside. I cut it, removed the frayed section, installed new fittings, taped them, then put the unit back in place. Voila! Fully repaired.