H95, H97, H98 or H99 mean that there's a problem with your inverter, magnetron, or digital programming circuit.
It may be a loose connection in the wiring between the inverter, magnetron, and/or control board, or maybe one of those components has failed.
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
In Canada, you can find an authorized Panasonic servicer here
For free DIY and other help and advice, feel free to contact me via my site.
Always include your FULL model number*, FCC ID number*, and detailed symptom information.
* from the tag in the cooking cavity or elsewhere on the oven (or send a clear photo of tag)
William E. Miller
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"