Look at your control board. If there are any burned spots, that can indicate the trouble point. Boards are made at the absolute minimum cost, so you're probably going to see discoloration, but that's not burning. Look for carbon and scorching. Check the fuse, if one's onboard. It's probably a ceramic tube type, or it may be a pico or other type. You can search for those and get an idea of what to look for. If the fuse is bad (get a cheap Harbor Freight DVM) replace it with identical type and ratings. Don't be tempted to change it. Still blows? Something else is bad. Look at connectors coming to the board. Look for discoloration. Connectors are another minimum cost part and they are often times shite. Look at the soldering on the board for the connectors. If you see cracks around the pins, that may be a problem. Soldering on chineseium (and Korean in the past) boards can be poor. Examine other items with large pins, they can crack as well. If it was a storm, it may have destroyed silicon and nothing you do will help without replacing that part. There's a lot of issues, but visual clues (and sometimes smells) are your friends.