If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter, controller, magnetron, or a bad connection from one or the other.
Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.
You can find an authorized Panasonic servicer here:
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- William E. Miller, AS-EET
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http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"
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