Down here, in the jungle, there is very little precision work shops, so, in order to get close to precision, I am building a metal turning lathe. I had it to where I could make smaller things out of bigger things. Now, I am redoing it to get where I have a limited amount of precision, for turning bushings, etc. and making parts. An angle grinder is my go to tool. Then, try to mill with a drill press and touch up with files. No matter what I do, I can get reasonably close to what I need.
With electronics, I always manage to locate that little hidden area that contains the smoke.
Then, I'm done. No way to know where to find the original cause of the problem.
Yesterday, I was making good progress, and ultimately broke off the 1/4-20 tap as I was threading a metal block. I am careful enough to not force things, but, this was from a chinese unobtainium tap and die set. Everything sold down here is make of unobtainium and has the CE chinese excrement symbol of approval. So now, I am about to try crushing the tap to remove it from the hole, and, MAYBE make a tap to do the final 2 holes. No way to buy just a tap down here. This is part of why I am slowing down, frustration. I do have a 1/4-28 tap, but, I would bet there is not a place within 100 miles that sells machine screws in that thread. Most stuff here is of the metric persuasion.
I have imperial tools and etc.