I'd like to say thanks for this thread and the link to the service manual.
It helped me diagnose and fix my AE700E myself
Although the Panasonic service charged me about 130 Euro with shipping for the P-Module
Guess I still saved some cash and time this way ...
To me the issue appeared to be tempreture related. At first I could get the PJ to stay on as soon as it heated up. So before ordering the replacement part I tried to re-solder all non-SMD connections, didn't help though.
The PJ was at something around 4700 h runtime when this happend.
Good luck to everyone else coming across this issue.