Our remote controlled garage door. Went out this morning and it opened/closed fine but on our return it wouldn't open. A quick look at the control panel showed it was totally dead so I checked the plug fuse and when that proved to be OK decided to open up the control panel. I could immediately see the courtesy light bulb had blown and after a little searching located the little circuit fuse board fuse which had blown along with it. Luckily I had a spare so replaced that, put in a new LED bulb, closed it all back up and bingo it's now working just fine.
