Yes, you are wrong for thinking Mesa should be held responsible for fixing an issue for the 2nd (or maybe 3rd or 4th) owner of a used amp 8 years down the line when you haven't paid a cent to Mesa for this amplifier. I bet if you were the original owner, they probably would try to help you out but then again if you were the original owner you probably wouldn't have waited 8 years for help unless you just didn't care to use the loop. You got a good deal on the amp because it had/has an issue, now you want Mesa to step in and make that deal even better by fixing the problem for you free of charge nearly 10 years later. This isn't how the real world works. Take the amp to a tech and get it fixed, or if it's not your worth your time resell it or return it.