Ok I a couple of weeks ago I got a sweet new rig. Aguilar DB 659, QSC RMX 850. My question is about the 850. When I play at home eveything works great nothing strange everything behaves normally. When I take it over to my drummers house for practices a strange thing happens. After a while the second sig. led stays on and wont go off. Even when I tun the bass volume down and mute all the stings. I have it set up for bridge mono so both leds light up when I play but the channel 2 stays on and won't go off untill I turn the amp off. It doesn't do this at my house. What could be causing this?