i have a audiobahn amp and it has a power and protection light on the back. the protection light is lit up and power is not. so my subs are not working. the manual says if the protection light is on then the problem is either input over load or a short circuit. how do i tell if either of these are the problem? i checked with a light and two wires to see if all the wires have power and all do, so now i am stuck. please help