As long as you have basic tools and some mechanical ability, the internet makes fixing just about anything, from cars to appliances, possible.
Google the make and model, and your issue. Most of the time, you will find what you need to know, in a few minutes.
In the case of electronics, when you can't get a PC board, or an exchange repair for a fair price, the parts needed to do you own repair are often for sale in a nice bundle. Or, if you are a little more savvy, you can find them yourself for even less money.
It's pretty easy to solder in something like a power supply transistor, and fix a board for almost nothing.
I once saved a $650 ECM furnace motor by replacing a thermistor on a PC board inside it. It didn't take any special technical knowledge to see the thermistor had turned to charcoal. And, a simple internet search confirmed that it was a common defect. I was cold for a few days waiting for the part to come, but my heart was warmed by the thought that for $3, It was going to be back in business.