Display not illuminated-total shut down of all functions-not plug fuse. Thanks

It sounds like there may be an issue with the high limit valve or the temperature sensor in your broaster. The CHECK message and the "high limit valve close" message may indicate that the broaster is shutting down due to an overheat condition. You may want to check the high limit valve and temperature sensor to make sure they are functioning properl

Hi,

Is the unit plugged in and is the light on inside when you open the door? If so you could have a blown fuse. The cabinet must be removed before you can replace the 20 amp fuse. Good Luck

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

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

Might be some issue with sensor,so it shuts down automatically.Since its happening for first time.If you come across this problem again..please post your issue...we will help you to fix that

try removing the touch pad/switch membrane and cleaning connections on ribbon cables. if problem still exists replace switch membrane.
Phil

I do not know what procedure you used to replace the door, but if the buttons and display were working fine before you replaced the door then it seems that there is a plug not plugged into the control display panel. Other than that the low voltage power supply may not be providing the needed voltage for the display and only for the logic circuits which are a different voltage. With the microwave unplugged, take the cover off and look at all the connectors and make sure that they are plugged into something and none that are not plugged in. They should all go somewhere. To answer your original question, there is only one main fuse to the microwave. The circuitry in the control panel operates on low voltages +/- 5 volts or +/-12v so that part is not fused. What I recommend also is to go back mentally through the procedure you used to replace the door and that may give you a clue as to what you unplugged, although you should not have to unplug anything.

The shutdown you're experiencing is separate from the control unit / display issue.

The shutdown is probably due to a a loose fuse holder, loose wiring, or a problem on the inverter board or the magnetron.

If the control unit doesn't receive the proper signals form the inverter, it will shut down the cooking process, but you say it acts like it's being unplugged - that makes me suspect a loose fuse or wiring.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person attempt to take readings on these inverters.

We actually have the service manual for this model and have uploaded it to our site here to help you.

You will need the free Acrobat Reader to view or print it in case you don't have it already.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

The best place to order Sharp parts is Tritronics. You can also call them at 866-779-5835.

If you get the shutdown problem repaired, we'd be happy to repair your display problem for you.

We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
[email protected]
http://www.microwavedisplay.com

My microwave is under warranty. I have this problem before and it was "fixed" one month ago by replacing a thermostat. This repaire is under warranty for 90 days.
I will have a service man to look into this problem.
Thanks MK

If there is no display and nothing works it may be as simple as a blown fuse. Try that first but unplug the unit before you do anything.

check the diode and the cap they like to go bad.good luck