Fun stuff. Good tools, even old tool are keepers and can save big bucks all the time. Learning how to fix stuff, using the right techniques, find ways to troubleshoot etc is great.
I am now fixing my own electronics, learned how to identify, test and replace bad components etc. The key on things like this is to learn, read/research and go for it. I even fixed a non-operational control panel of an equatorial mounted computerize telescope not long ago. Not to mention a HF (high frequency) solid state amplifier. I have no formal training here.
That is way ahead of what I do. You are getting smarter while our public schools are turning out dumber students.
The internet helps a lot with u_fix_it. YouTube can also be helpful
I have not moved on this yet. I have a computer power supply I am going to try and fix. It has some blown melted capacitors. So I figure rob same rating capacitors from some junk power supplies and replace them.