I have a customer whose C552 is blowing the circuit breaker immediately on power-up. The sub-power switch doesn't need to be turned on, just hit the main power & the breaker trips half a second later. If the front or side doors are open, the breaker doesn't trip until they're closed. I've tried replacing the IH power unit, the IH coil, and the DC power supply. One of my fellow techs thinks it may be the HV unit, but I wouldn't think that would come on immediately before even the MFP board. Any ideas?
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