I think it is a major problem, you need to check the manual or call the support center of Panasonic for more help.
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I suspect you were probably hoping for an easy answer for your non-working microwave oven. If that is the case, I suggest you try jiggling the door, in the hopes that maybe there are some interlock switches that aren't closing properly. If jiggling the door doesn't work, and it probably won't, it will most likely be necessary to take the metal cover off and look for deeper answers. To do this requires that one overcome laziness, overcome fear, and overcome stupidity. If you doubt your ambition, or your courage, or your capacity for rational thought, then I think tinkering with broken microwave ovens really isn't for you. BTW the I-have-a-broken-microwave-oven question has been asked here before, at least twice in recent memory:https://www.instructables.com/answers/how-can-i-fix-my-microwave-it-stopped-warming-food/https://www.instructables.com/answers/I-have-two-expensive-microwaves-that-have-seased-w/ Usually most of the replies are blah-blah-blah-danger, blah-blah-blah-qualified-personnel, blah-blah-blah-don't-do-it, interspersed with smaller amounts of actually useful advice, like making certain the oven is unplugged, and the big HV capacitor is safely discharged.
Gee Jack, I don't think that most people have to overcome "stupidity". How about inexperience?
Let me try to clarify that. I use the word "stupidity", but a better word would be "recklessness", or a lack of caution. I mean the real danger lies in doing something stupid, for example touching the high voltage circuits while they're energized. That would be stupid. So the smart thing to do would be unplug the microwave oven from the wall, and make sure the big HV capacitor is discharged. Ah!!! But there's always going to be this temptation to plug the oven back in again and power it up. After all, one of the goals here is to get the microwave oven working again. Another important goal is being safe, and staying alive and uninjured. The trouble is that sometimes these two goals can seemingly come into conflict with one another, especially if there is haste, if there is the desire to get the microwave working again quickly. Anyway, it's important to ignore the nagging voices telling one to do imprudent, unsafe things, just to save time, or for whatever reason. This is what I mean by "overcoming stupidity".
Sounds ill. You're not doing anything non-food with it are you? L
It sounds like a control issue. But it needs servicing from a certified repair person. I doubt very much that there is anything that you can do to fix it. I could be wrong but I don't think so.