Microwave Problems. Panasonic NN-S541 .... comes on, runs for about 3-4 seconds and then shuts

Question

Panasonic NN-S541 .... comes on, runs for about 3-4 seconds and then shuts off. Doesn't matter what cycle I choose, I get same results. I do hear some "strange" noises (clicking??) coming from the right-side middle to rear of the oven the short time it's running. Also, I get a VERY faint odor akin to electrical smell. It is so very faint as to make me wonder if I'm imagining ... it's that miniscule. I only paid $100 for it new, so I'm not wanting to take it to a repair shop ... thought there might be something I can handle. If not, I'll buy a new one. Thanks!