... I can't throw this one away, its an $800 microwave.
yes, you can ..
here's an excerpt from a similar Panasonic Inverter M/W repair info
With the cover off the microwave oven and CRO connected,
the control and status signals were measured with the oven operating.
The Control signal turns out to be a TTL-level 220Hz square wave
where the duty cycle determines the “Power” from the Magnetron.
The Status signal from the PSU is a 110Hz square wave with a fixed 50% duty cycle.
This signal seems to be present when there is a current drain,
probably to signal that the Magnetron is warm and operating.
The Control and Status signals are synchronised to each other,
but bear no relationship to AC mains frequency or phase.
Here’s a picture of the CRO trace showing the control signal (top)
and the status signal (bottom).
2-channel oscilloscope waveforms: