Hi, I have a strange problem. I've used this sub with my Onkyo 606 for a few months now and it used to auto on and off all the time (the light would go from green to red after around 5 mins of inactivity and it would wait until it had a signal again before turning on). However, recently it's permanently on and won't auto-off even if I take out the sub cable and leave it without an input. I was thinking maybe my power supply was surging or something so I bought a surge protector but it's still always on.

Any ideas? I like the feature because I don't want to waste electricity.