If the green light doesn’t stop flashing, it means the software is not booting. Other reasons is initiation switch is not on normal.
If software issues not much you can do.
It’s possible its the power supply, but that normally just shuts down the system.
You could see about sending to Panasonic, I believe they are repairing systems for another few years but it could be gone a few weeks. I would be looking out for something else at this stage