Your Panasonic microwave has suddenly died, and you are debating whether you want to purchase a new one or have the old one repaired. Before you do either, you should try replacing the fuse to see if that is the culprit. Panasonic microwaves are infamous for blown fuses. Fuses are a relatively inexpensive investment and pretty simple to replace, even for the electronics novice.
Unplug your microwave. Insert the size 15 Security Torx bit into your multi-bit screwdriver and remove the screws from the back panel. Take off the back panel.
Locate the fuse. It should be near where the electrical cord comes into the microwave. The fuse is a small white bar with metal caps on either end. Carefully remove the fuse. Avoid touching the transformer or other parts inside the microwave.
Purchase a new fuse. Most Panasonic microwave ovens use an 18 amp ceramic fuse. Consult your owner's manual to find out what kind of fuse is used, or take the old fuse into the store to find the exact match.
Replace the fuse. Put the cover back on and see if your microwave works. If it does, replace the screws. If it does not, try a different fuse. If the microwave still does not turn on, you may have to have it replaced of professionally repaired.