Hi,

**Microwaves are very dangerous, they can still shock you even
unplugged!!**
**Discharge the capacitor first before attempting any checks or tests**

everything else works like the light fan, keypad. All
that is failing is the heating the food part.

Q - My microwave is running and sounds like it is working but will not
heat up anything.

A - Many thing can do this but, common things are....loose high voltage
wire.....poor solder joint on board.....magnetron.....power relay.....

Q - The microwave makes a loud "hum or buzz" noise but will not heat up
the food?

A - 9 times out of 10 this is usually this is a bad magnetron, the
other time is sometimes a bad high voltage diode.

Same testing ideas....
http://www.applianceaid.com/micro7.html

jeff.
Appliance Repair Aid
http://www.applianceaid.com/