You can also hopefully find user and service manuals online.

In 2009 or so a projector at some event that needed one wouldn’t start, and I noticed it was flashing a pattern, so I found a computer and internet connection (both very slow), painfully found and downloaded the manual for that model, and identified that it was saying the fan wasn’t starting. Lo and behold, a strut was broken and obstructing the fan blades, and bending it out of the way fixed it, and the event was able to begin.

I’ve found manuals for a drawbar organ, multiple digital pianos of different ages and brands, AC split systems, and more. Manuals are good stuff. They don’t cover everything, but they’re very useful.

For these sorts of things, AI is doing approximately nothing for you: you would do better (and learn more!) finding the actual manual, or you’ll want to see someone doing the thing in a video.