Marshall MG not working, i need help!!

[Amp Kat]

Can't agree more with Enzo Roast that without the knowlege it's going to be very hard. You may call Korg USA and it's possible a tech may have a fix for it and you can swap the component but here again you have to be very careful with the iron not to damage the pads and cause another problem besides the one you allready have. If I had an MG I could get you on the phone and probably walk you thru some checks to verify the op-amps or output devices. If you could find someone who has one plopped open allready on the bench testing ready that would be the way to go