flashing, like microwaving a metal object
ge browning microwave, model JES1384SF001
flashing inside microwave, just like having a metallic object in oven. thanks ray
My microwave also started doing this, and simply cleaning the waveguide cover took care of the problem. In my microwave, the waveguide cover is on the inside of the microwave, high on the side wall. It's about the size of a playing card, made of plastic or fiberboard. I removed mine for cleaning, but that wasn't necessary. Simply keeping the inside of your microwave clean may solve this problem.
Try to find where the arcing is coming from by viewing th e inside of the oven "cavity" while the problem is happening. You can safely run a microwave oven with a container of water inside (something like a margerine container for example). The arcing usually indicates that a component is breaking down and carbonizing, therefore becoming conductive and sparking while the oven is on.
It is common for the "waveguide cover" to do this. The problem is caused initially by food debris, etc. becoming stuck in the crevices of the cavity and then becoming conductive. When you locate what is arcing, you will know what component needs to be replaced. Jim
I just want you to understand the risk involved with tinkering with a microwave, from the microwave troubleshooting:
"Careless troubleshooting of a microwave oven can result in death or worse. Experienced technicians have met their maker as a result of a momentary lapse of judgement while testing an oven with the cover removed. Microwave ovens are without a doubt, the most deadly type of consumer electronic equipment in wide spread use.
Please be very careful if you remove any covers.
I'm suggesting that the user keep his/her hands in their pockets during the analysis phase. Make sure that the power is disconnected and the high voltage cap is discharged before doing any disassembly or replacement! Under those conditions, a microwave oven is completely safe to work on. I mean, after almost 40 years in the business, I'm still here!! JIm
I removed the waveguide cover from my Sharp Microwave as suggested and found carbonized material on the surface that faces away from the oven cavity. It was somewhat baked on so I cleaned it, first with a wet cloth, and then scoured it with an abrasive sponge.
When I reinstalled the cover and tried using the oven the problem was completely resolved. Thanks for this information.
I had this issued with flashing light along without heating up anything inside of the microwave. The reaction would occur in less than 30 seconds and I prayed to Jesus and found this response.
Thank you for taking time to write this answer. I wiped the card inside with metal scouring applying dish soap. Some of the card flaked off being pretty fragile and placed it back in the microwave. I once again prayed turning on the microwave to find that the cup of water did heat up in 30 seconds without any flashing light or power interruption inside the unit. Now it is back to normal.
I hope people are still responding to this thread…
I just bought a brand new Panasonic microwave and went to heat up some left over veggies and ham for my son for dinner and the food sparked and one piece even caught a small flame. I unplugged everything and tried to trouble shoot with my husband. I didn’t miss any part of the set up process or forgot to remove any of the packaging. There wasn’t anything weird or metal based in with the food (no foil was used in making the ham earlier etc). Would it still be the waveguide causing this problem if the microwave has never been used? I am hesitant to remove it in case it messes up my chances of returning the microwave if I tinkered with it (I just bought it today).