I have a Sharp R-305KS stainless microwave. It is about 1 year old and until recently, I haven't had any problems with it. About two weeks ago the cancel button on the front panel started to work intermittently, and then stopped working altogether. Within a few days, the other buttons stopped working, and now none of them seem to work. I've unplugged it, and plugged it back in again, which doesn't seem to make a difference. The display still works, so it looks like it has power. The front panel doesn't work at all anymore. Any ideas?

The service manual is here: http://www.microwavecontrol.com/dcm24_r930ak_aw_sm.pdf

You may have a failed thermistor.

Contact me directly if you need more help.

- William E. Miller, AS-EET
[email protected]
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

If the microwave oven is 7 years old or less, the magnetron is shorted or the inverter board is.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron.

Since it's less than a year old, it's fully under warranty and Sharp will fix it free.

You can contact Sharp at 1-800-BE-SHARP (1-800-237-4277) or visit them online to get it fixed.

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

Hello there:
This is normally caused by a faulty touch pad that is failing These touch pads are replaceable but they can cost about 60 to 100 dollars depending on the exact make and model ok
I hope this is very helpful for you
Best regards Michael

It will have a one year warranty.

I would contact Sharp for their nearest authorized servicer.

You can contact Sharp at 1-800-BE-SHARP (1-800-237-4277) or visit them online.

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

There is carbon buildup in the waveguide and it will continue to arc until it gets cleaned. It may or may not be usable again.
Eric

It sounds like there is too much running off that one power line in the house... its starving for power which will take from where it can such as UPS fridge or freezer - other than that it could be a faulty junction box or wiring so you would probably want to see an electrician about it before there is a fire... If too much power is sucked from one wire it may get very hot!

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If that's model R-305KS, we 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.

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

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

Thank you for your service to our country.

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

Hi - You can download the manual from the link underlined in blue below:

R-305KS

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I'm confused. If it's 6 weeks old, you can get it repaired free.

If it's 1-1/2 years old, the manufacturer will cover the part cost of the magnetron (assuming that's what's wrong) and you will have to pay for labor and any other needed parts.

Also, the subject line mentions a model LMV1630ST while your message body mentions model LMV1680BB.

For Goldstar / LG / customer service, help, call 1-800-243-0000 (M-F, 7am-8pm CT, Sat 8-5 CT) and choose the appropriate prompt from the menu or visit here.

Chances are your problem is a bad magnetron, but it may be another high voltage part.

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