Achievement Unlocked: Advanced Oven Repair
Our roof leaked and some water got into our oven which resulted in incessant midnight beeping. After drying out it; a day later it would not turn on. The burners were the only thing that worked.
Like any self-respecting geek I took it apart to try to diagnose the problem. After much inspection with a magnifier I found precisely where the water had leaked on to the control board and used a wire brush to clean up the solder pads which had obviously corroded and formed circuits between pads. It worked!
The oven now works just as well as it did before roof leak broke it.
Here’s an album of images showing the damage to the board: http://imgur.com/a/nljLg