Damaged ICEPower 125asx2 board

I'm currently building/assembling a pair of Icepower 125asx2's the cases are aluminium and my speaker binding posts weren't isolated, I didn't realise when testing and damaged the amp as the speakers were all shorted out together. I have now isolated the speaker binding posts but now channel one has horrible noise coming through, hissing popping buzzing, the amp is basically unusable. Any idea what damage I've done and if it's fixable? Thanks