I recently moved into a new place and reconnected all components. (xpa-2, xpa-3, umc-1) Every so often when I power the system on the center channel, on the xpa-3 makes a loud static noise and the amp flips to protection mode. (flashing amber) I began to troubleshoot the issue by removing one connection at a time. But the issue is so sporadic it could take some time to figure out if it is indeed one connection or the device.
Any ideas of a more efficient way to figure this out? All cables and power basically remained the same after the move too.