Normal
Something gave up the ghost and it could be the output transformer as the humming and no sound can indicate that.You may have read on here that the rm20 and 22's transformers all around are susceptible to failure. They are just not high quality.I sold an rm20 combo on eBay that I had been playing at bedroom levels for about two years without any problems only to have it fail right away when the buyer played on it for 30 minutes. So, it may not be something you did, it just happened.Rob at jaded faith may be able to help you diagnose the problem if you want to contact him via his website and he is occasionally on here. His work is excellent and his prices fair considering how much of a niche market the mts stuff is.
Something gave up the ghost and it could be the output transformer as the humming and no sound can indicate that.
You may have read on here that the rm20 and 22's transformers all around are susceptible to failure. They are just not high quality.
I sold an rm20 combo on eBay that I had been playing at bedroom levels for about two years without any problems only to have it fail right away when the buyer played on it for 30 minutes. So, it may not be something you did, it just happened.
Rob at jaded faith may be able to help you diagnose the problem if you want to contact him via his website and he is occasionally on here. His work is excellent and his prices fair considering how much of a niche market the mts stuff is.