Hello, I hope you can help me with a problem. Recently we notice that the subwoofer in our system is no longer working. It is a Sunfire EQ Solitaire 10. Previously was working fine. Now, does not play at all. Checked the outlet, has power. Fuse is good. When you flip it on or off at the switch, a very quite "thump" occurs so it seems to get a bit of power, but seems to stay in stand by. When I try to reset per the instructions, the lights on the back EQ do not light up, nor do they light at any other time. I even attempted to perform the auto EQ setup, however, again the LEDs do not light up and the sub does not generate any test tones. I suspect there's something wrong with the electronics in it. Can anyone provide any assistance? Thanks!