The microwave starts, then stops after a few seconds, and smells

if smells like something then something is burning stop using answer about can it be fixed is unknown till diagnosed

Robert, I will post links below that may address your problem.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Microwave Shuts Off After Few Seconds

http://forum.appliancepartspros.com/microwave-repair/2937-panasonic-starts-then-stops.html

Why does my microwave runs for few seconds and stops

Appliance Repair Forums

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

Since this an LG microwave, an F9 error when the inverter module fails. Unfortunately, other parts could cause the inverter to read as a failure. A bad magnetron, relay 2 or door switches or the connections between the various parts could be bad. Since the microwave is starting, the switches are the least likely culprit. However, it's hard to determine if the inverter or the magnetron is bad without replacing one part. Then the other if the first repair doesn't solve the problem.

I hope this helps.

Cindy Wells

Does the oven's key pad seem to reset like a breaker flipped inside? And after, you have to reset the clock? If so, check the temperature cutoff switches inside. Jumper across them and see if your microwave starts working correctly. I had this problem and the Bottom TCO was defective.

replace magnetron

It sounds like you press STOP two or three times to lock it. Maybe that (or another key) will unlock it.

The lock / unlock procedure will be covered in your owner's manual.

Or you can try a hard reset - unplug it from the wall for one minute, then plug it back in and try again.

If you don't have your manual, you can get one here. (Enter your model number without any spaces)

We're happy to help and we appreciate your thoughtful rating of our answer.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

It may also be the high-voltage rectifier diode.

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Feel free to post your brand and model so we might be able to give me specific info.

My GE spacesaver microwave all of a sudden stopped heating up things. The lights, fan, turntable, etc. work, but nothing is heating up. Any suggestions?

I would suspect either door switches or an intermittent control circuit board, either of which can be repaired. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure over time. I have a text file on my site called "doorsw.txt" which helps in diagnosing and repairing door switch problems. You can find the file via a Google search. It will help you check and replace the door switches if you or an able friend is so inclined. In some cases, the problem is a bad connection or a bad relay on the control board. That's something we see fairly often, and we repair them for only $32.50 nationwide.