I just picked up the same model sub and speakers and i am having this same problem. I opened up the sub and found a resistor that i THINK has been burned near what appears to be the power supply. I really have no business opening up any hardware to try to fix it but i would like to try. It says R26 on the circuit board underneath the resistor i think it burned. The paint or coating (whatever it is) on the outside of this resistor was starting to peel, and started to fall away with a light touch. Could this be causing the control mod to not receive any power? The sub does get hot when i plug it in so it would appear that it is receiving power. But the light on the control mod does not light up.