JBL Sub 12 continues to make clicking noise

I purchased the JBL sub12 venue series and lately it starts to go on standby then power back on constantly. You know the sound it makes when it gets a signal and powers on, well it does this non stop, it constantly clicks because it goes to standby then back on again. I have tried a new line in cord, a different amp (not the sub amp), and different input to the amp, im convinced that it must be something to do with the sub amp thats inside the box. Anyone else have this problem?