bobjones2260 wrote:
A majority of the time it is the common sense stuff, if your good knowing that it may hit the trashcan, take the back off, look at input and output jacks, look for fuses. I had a Roland JC-120 that had "No User Serviceable Parts" everywhere and when I opened it up there was a fuse soldered to the board, so I get it you need to know a soldering iron but outside of that it was just a fuse.
Craziest part is check youtube, sometime devices have common faults and people make videos. I know nothing about home heating but when my heater turned on then off real quick a youtube video for my specific model told me how to remove a sensor and how to clean it and it worked.
What he said... if it ain't on youtube, it's trashcan time!