That's way beyond my little experience with electronics. But I don't think there are internal components you can replace in an integrated circuit, even in a huge one like this. That's the purpose of being integrated, to be a single block.would it be possible to open up the amplifer and test/replace the culprit internal components?
Bloody hell, brand new ones you don't need to repair.few shitty pics from two brand new fw900s I stumbled upon recently