Blown Amp?

I got a Pioneer GM-7100M amp a few weeks ago. Today, I was listening at a moderate-to-low volume, and my sub just stopped. I checked my amp, and the light ontop of it still lit up. So I used a voltmeter to check it. The power/ground are still getting full power, but when I checked the mono channel, I got a -0.001 reading. I tried moving the gain around, messing with my HU, checked the amp's two 20A fuses, and the fuse on the power cable. All of which were still good. Any ideas on how I could fix this? Or is it just a defective amp?

Checked wires - all still good. Checked wires in box - still good. Checked sub - still good. No burnt smell from amp.

Check your rca cables. Also try another speaker on the amp.

RCA cables? Would it stop sending any power to the speaker terminal if an RCA cable came unplugged?

If your rca cables came unplugged from the back of your hu ,you would not get a signal to your amp. Or if they somehow got cut, or if you had them under stress, this could cause the amp to not produce sound. This is an inexpencive thing to try. Also try connecting a different speaker to the amp. Try hooking your amp to a friends system to see if you get the same results. If not then the problem could be your hu.Just a thought.

Meh, I tried checking the RCA's. They also seem to be working properly. I don't think it matters if I try hooking another speaker to it since there's no voltage coming out of it... Tomorrow, however, I will try hooking my amp up to a friend's system. And I don't think it's the HU. Everything else on my HU is working perfectly.