I recently acquired a Denon AVR-3313CI A/V receiver that is not working properly. I traced down the malfunction to there being excessive load on the 3.3v circuit pulling the voltage down to around 1.5v and causing the DC-DC converter to get overly hot. I unsoldered the two zero ohm resistors that connect the converter to the rest of the circuit and the voltage came back up to 3.3v. Is there any way to trace down the cause of the excessive load or is the unit trash? I was thinking maybe use a thermal camera to see what components get hotter than the rest.