My center channel has a static noise when no signal is running through it. How can this be solved? After turning off the amp, the capacitors drain and then the speakers make a really high pitch squeak a couple times and everything is off, the center doens't make static anymore....btw is it ok to leave my amp on all the time when not using? it doesn't have standby just on/off. also my LED lights do not turn on when signal is going through, it works fine actually really good...IT SOUNDS GREAT. Well Thanks in advance.