Power Distribution Board making noises

[Al Skierkiewicz]

Originally Posted by ravena

Our power distribution board started making noises. It makes both a mid level hum and a separate crackling or arcing noise. All lights are correct and everything else seems to work.

Anyone else experienced anything like this?

hum and crackling noises sound like a problem to me. Start by removing all cricuit breakers and then turn the power back on. If the hum and crackling have gone away, try installing breakers one at a time. Breakers do go bad and are known to have manufacturing defects. The crackling noise could be a bad contact in a breaker. If the hum remains with all breakers out, doulbe check your outboard voltage wiring to the camera, CRIO, and sidecars. You might have crossed connections, which is producing a short on the output of one of these independent power supplied internal to the power distro board.