QSC GX5 2Channel Amplifier "buzzer goes" Questions

...it. Generally you can touch with an insulated tool parts of the amp to produce a buzz. So if it buzzers in the good channel it should buzz in the bad. When it doesn't you have found the bad

...do tests, such as touching the two channels with an insulated screwdriver, while powered up. If it buzzers on the good channel, it should buzz on the other channel at that point. Keep away from the ...