This can get to me with a lot of techs in any field. When you’re paying someone you expect the highest level of testing and due diligence and often get less than what you would do yourself if you just had the tools and knowledge. Can’t speak for Mike B. but I think a lot of these guys have so much backlog they’re trying to move through a repair fairly fast, which isn’t what you’re paying for. I don’t care how much you got, when you get to mine, especially if it’s heat related or takes a minute to show, I expect some patience and planning. You’re charging me the same whether you can get to it tomorrow or three weeks from now.
I know though, people can be seriously budget minded and techs can suggest pro-active things that a customer will say no to, but you should at least have the amp come back with the problem fixed.
I would definitely try and capture a problem like this on video if at all possible.