Brian T Zebulon , NC December 05, 2023 Appliance: General Electric Microwave PSB1201NSS01 Ge Microwave Psb1201nss01: On but wouldn't heat. How to replace Diode Assembly. Like others, I don't have to diagnose the issue so I replaced the capacitor, diode, and the magnetron. Definitely need magnetic screw driver for screws around magnetron..all in all, pretty easy repair. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes