PSW-125, capacitor gassing off?

So my PSW-125 gave up the ghost, the seemingly standard problem of constant noise regardless of switch position, humming, beating, basically everything except what you actually want to hear. I popped the amp out of the back and it sounds and smells like a capacitor gassing out. I can't get the last screw out of the board mounts to get behind it and try to figure out which one is blowing, is there one that is commonly known to fail? I'm not overly keen on replacing the entire module, frankly for the money that costs I'll just go get a new (non Polk) subwoofer.