Like everyone else has sttead, buy a new one because it's not worth repairing, especially if you're not in the mood to unmount, disassemble, reassemble and then rehang. It MIGHT be the magnetron, but there's almost half a dozen components that can cause your microwave's symptom should any one of them fail (thermal fuse, diode, capacitor, transformer, etc.).If it's under warranty, you might be able to get a GE service tech out to field test it for you. They'll most likely tell you what's gone bad (and tell you it will cost x-amount of dollars to repair) and you can service it yourself at that point because you'll know which part to replace. Or just pay them to do it for you at a rate of about $50 an hour with the part possibly free.If you do attempt to repair yourself, be mindful of the capacitor it can kill you if not discharged properly. Good luck.

Tekstas*