i'm at church currently, and our pa system is wiggin out completely. the volume keeps going up and down, even when we're not at the sound board. we have plugged into a different outlet and it still does it. We have QSC RMX2450 amp and a QSC RMX1450 power , one of each. i checked the banana plugs on the back of the power amps and one was half way out and i plugged it in and it didnt change anything. HELP PLEASE!!!