Problems with DSW Pro 660

TJM

My DSW Pro 660 subwoofer went out a few months back. Issue is it'll turn on for a few seconds then it shuts down. The blue light on the back panel is blinking so there's power to the unit. I also took the unit apart yesterday and there's several burn spots on a couple of the different boards one being the Power supply. Looks like a burnt resistor and a capacitor. I called Polk 3 times finally got through to a nice gentleman. He said that I need to replace the Power Board Part No. RE 6637-1. Polk DOES NOT carry the replacement unit anymore. He told me to check Parts Express and Midwest speakers. Neither outfit carries that part. I've read all the complaints and this seems to be a fairly common issue. I'd rather not spend $300 for a replacement board, if I can fine one. Any suggestions would be greatly appreciated. Also is there a suitable replacement board that's reasonable or can I get the existing board fixed for a reasonable cost? Any suggestions would be appreciated.