JES1456DSBB Stopped working but turn on when I open the door.

Check three door sensors, especially for two closed state switches.

We recommend you have the microwave evaluated by an authorized service center.

Authorized service centers can be located in the below link.

www.panasonic.com/repair

This sounds like either a bad door switch or possibly a latch head problem from taking the door apart......

It may be a bad door switch or mount.
(Anybody in the home opening the door while it's cooking?)
See our help file on door switches here.

It is one of two things, a defective door switch, or the keypad control board has failed.

Check the door switches and mounts. See this help file.

This problem is caused by a microswitch that is sticking in the closed position. Inspect and replace the defective microswitch in the latch assembly.

IT IS POSIBLE TO HAVE A BURNED FUSE ON THEI Main boARD OF THE OVEN

My Panasonic 1300 W Microwave will not turn off. When I open the door after cooking it restarts and when I open the door before cooking it starts. I can stop it by pressing stop/reset before opensing the door after cooking has stopped but if I press this befroe opening the door to put a meal in to start cooking it will turn on by itself. What's causing this and is it worth fixing?

Sounds just like a bad door switch or door switch mount. Probably the upper one. Safety info, disassembly tips, and door switch test and replacement info are all available at our Web site. See http://tinyurl.com/yzjozk