Emerson microwave MW8992SB Just nothing. No clock no light. worked last night.Has electricity to it.

check fuse if open replace short switch and proper amperage fuse

Check the three microswitches in the latch assembly.

It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.

YOUR SAFETY IS PARAMOUNT

This is a job for a professional but if you are safety clued up, here's instruction.
Make sure the !!!!any capacitors are discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.

sounds like a key panel or control board

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

there is a thermal (white ceramic) fuse located right under the cover on the top of your microwave replace it.
an electronics part store should stock it.

http://microwaveglasstrays.com/shop/-c-21_77.html I found mine here...hope this helps

To enter the time you must push the clock button once before you enter the time and again after you enter the numbers. Try that and you should be all set.

Please mark this as a fixya! thanks.