Show HN: I hacked my microwave with keyboard switches (and Ars wrote about it)
arstechnica.com
arstechnica.com
The original keypad was broken, not sure if it's the ribbon cable (which does show signs of wear) or the actual contacts under the keys (which I wasn't able to access).
After several rounds of messing with the keypad ribbon cable, putting the front panel back together, testing, and trying again, I decided the best thing to do would be to just break out the minimum set of buttons needed for operating the microwave until the replacement arrives.
I had a couple of keyboard switches laying around so I figured I'd use that. Upon powering the microwave, the user has to enter the time and press "settings" to confirm, so at the very least I had to wire the "1" key (to enter 11:11 as the time) and "settings". I also wired "+30 seconds" to easily set the cooking time, and "cancel".
It's been a real pleasure to press those mechanical switches, but it's only a short term fix. We have a new microwave coming soon!
Overall, I'm a bit disapointed with the reliability of GE appliances. 9 years isn't bad, but it could certainly have lasted longer.