I didn't find any control boards on Ali, but saved a search on eBay, something may come up. Thanks so much for sharing your experience with STM32's; that saved me a bunch of time trying to learn how to program or even access it! Worst case is that I will strip it for parts....

I'm having a random issue with this otherwise nice double oven/air fryer. It sometimes does not respond to the controls. Sometimes only the upper control buttons work, sometimes they all work and sometimes none of them work. The power supply is good as the control board has a steady 5V and 3.3V. The pushbutton switches are all good as tested with multimeter. When the buttons are working, there is about 2.5V to the high side of the pushbutton. I'm assuming pressing a button grounds the input pin to the microprocessor. When the buttons are not working, there is about 0.3 volts on the high side....

Just to close out this thread, I removed the remnants of the old capacitor and the traces on the ground side were gone. So I mounted the replacement cap directly on top of the other one (PC4427) and it is working fine. Thanks for all the help! Will be donating to this awesome site.

Thanks, will do. I'll remove the mobo to make sure no damage on the other side and hopefully get a good connection point on the top side....

Thanks, useful information!...