You-tubed "fixes." Ordered a fuse, diode and magnetron, in case it was any of the 3. Took apart the microwave as shown on video, found the fuse replacement, and wa-la, that's all it took. $6 part and I sent back the others for full refund. Saved me having to spend almost $400 on a replacement, and then another $125 for a trim kit. Well worth buying through AppliancePartsPros.com Will definitely do business with them again.