Besides the
electronic control itself there look to be 2 possibilities. 1. The filter board that houses the fuse and 2. the thermal cutout on the magnetron tube. Both look to stop all power from getting to the control when they fail.
LINK > Bosch HMC80251UC Filter Module (✔️in stock - ❌ no photo)
LINK > Magnetron Thermostat (✔️in stock - ❌ no photo)
LINK > Magnetron Thermostat (❌NO stock - ✔️part photo)
Dan O.
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