life4sk8

Hi everyone,
I'm trying to solve a problem I have with my MMI and I think it coming from my amp... I've got nothing coming from my screen only the boot screen. My amp is always a bit hot so it might be draining the battery and I have a really small clicking song coming from the speaker. Vag-com cannot reach all the component related to the MMI because I have an error in the optical bus in the sound system. I change the connection with the optic fiber
to see if the problem is changing but it always address with the sound system that what I figure it the amp. Do you guy know a test or a way to make sure that is my amp that is the problem before I remove it and open it to see if I can do something with... By the way my car it a a6 c6 4f avant with the bose system dsp 6000 most. Everything start with the winter and the rear windows washing fluid pipe broken. Thanks