Turn the entire system off, pull the inputs from preamp to the amp and turn it on. Hum? Prob with the amp.
Integrated? Pull all source interconnects and turn it on, Hum? Bad integrated amp. No hum, proceed with shutting it back down and plugging one source at a time and powering back up. No hum? Proceed to the next one, just make sure you're powered down when pulling reinstalling interconnects. Process of elimination looking for the problem.
Polk's tonearm may be the first option before mine.
Integrated? Pull all source interconnects and turn it on, Hum? Bad integrated amp. No hum, proceed with shutting it back down and plugging one source at a time and powering back up. No hum? Proceed to the next one, just make sure you're powered down when pulling reinstalling interconnects. Process of elimination looking for the problem.
Polk's tonearm may be the first option before mine.