I am in search of some help troubleshooting my microwave. It is a GE Spacesaver.
Problem: microwave does not heat up food.
Investigation: All buttons and lights work fine. Turning on microwave using the express cook buttons, the default is "Hi Power". I notice the microwave acts like it is in defrost mode, where the radiation goes on and off through out the express cycle. I am not sure if this is a Magnetron issue or control panel issue.
Request: I need some troubleshooting ideas/suggestions
I appreciate the help.:)

Note: Also looking to find a good source to get repair manual or system diagram of my microwave.