Hello, My Sunbeam micorwave oven will no longer turn on. I have checked the fuse with an ohmetter and the connectivity and everything seems to be ok. My question, How can I check whether the electronic board that ensures the time control and heat control is working properly? Thanks.

WHAT IS WRONG WITH YOUR RANGE / STOVE / OVEN?

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Warning! To avoid personal injury or even death, always disconnect your appliance from its power source--that is, unplug it or break the connection at the circuit breaker or fuse box--before you do any troubleshooting or repair work on your appliance. Also, because some components may have sharp edges, use caution while working on your appliance.

There's an error code on the digital display

It's stopped completely
It won't bake
It bakes poorly
It won't broil
A burner doesn't work
A burner works only intermittently
I can't adjust the burner temperature
It won't bake or broil
The clock stopped
The temperature is wrong
The oven light doesn't work
There's a self-cleaning problem
The oven door won't close
An indicator light doesn't work correctly
The oven is hot on the outside
I see sparks!
The drip pans need replacing

There is no reset button check the fuse underneath the cover Note The fuse is a ceramic fuse

The description you provide indicates the magnetron has failed, "heats food" and blown the main fuse in the microwave oven, since the unit is 10 years old it is much cheaper to replace with a new one rather than have it repaired.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ;

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Most tv repair shops carry them, or appliance repair shops, and Radio Shack.

Hello there:
If your microwave oven doesn't seem to work at all, check these: Fuses Door switch Fuses Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it. Door switch If the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work.

You can get a four pack of these fuses at Radio Shack for $2.99. The part number is 270-1040. Hope this helps you.

You have not mentioned the model and make of the oven. You can check if there is a fuse between the highvoltage winding of the transformer andthe capacitor. If it is blown off replace the fuse, or you have to replace the magnetron.

The loud pop was almost certainly the high voltage diode going bad. To find parts, I suggest you call the number on your owner's manual or check with the store where you bought it. Sunbeam may not make this part available, so be prepared. Maybe they have authorized servicers in your area. Ask them about that. Good luck.