klipschuser

I have this sub ... http://mediacdn.shopatron.com/media/mfg/3579/media_document/live_1/SynergySubs1012Rev2012.pdf?1329261485 I bought it in 2004. It has worked flawlessly for me until just a few days ago ... when now it doesn't appear to power on. I took out the board to see if there was any noticeable damage and I dont' see any ... does anyone have suggestions on how to get this sub working again? Thanks