This is something I'd love to do except it sounds like you said, it requires some basic knowledge of EE etc. Maybe the basics isn't too hard but with the vast diversity of different types of electronics - it troubles me just thinking about troubleshooting what of the 100s of internal parts could be the issue.
I've done my own repairs for phone screens/boot loop issues etc. but they were considered super easy because they were popular phones (galaxy/iphone) and as such, guides were plentiful on youtube. I can't imagine similar resources would be available for, say, a random branded tv or a blender.
Screen fixes are super easy for phones as it's usually a take apart and replace the cables and put back in deal. Anything remotely difficult was fixing a bootloop issue on a galaxy s4 which required a multimeter to confirm the issue and a soldering iron but again, a guide on the exact issue told me exactly what to do.
I've done my own repairs for phone screens/boot loop issues etc. but they were considered super easy because they were popular phones (galaxy/iphone) and as such, guides were plentiful on youtube. I can't imagine similar resources would be available for, say, a random branded tv or a blender.
Screen fixes are super easy for phones as it's usually a take apart and replace the cables and put back in deal. Anything remotely difficult was fixing a bootloop issue on a galaxy s4 which required a multimeter to confirm the issue and a soldering iron but again, a guide on the exact issue told me exactly what to do.