I have a Marshall JCM2000 DSL401 and I turned it on today and there was no sound. I look around back of the amp and the tubes did not light up when I turned it on. I replaced the preamp tubes and the power tubes but still the same story. The fuses look fine, i think. If anyone could advise me if they have a similar situation or any suggestions before I take it to a repair shop ,It would be greatly appreciated...Thanks ahead.
If you don't know how check fuse to be certain it is fine, replace it with correct replacement.
Would a fuse cause none of the tubes to light up? Because it powers on, but the tubes are not lit up...?
If the HT fuse blew it would. Replace that and see if that doesn't solve your problem.