Question about Sharp R-820B Convection/Microwave Oven

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Nothing happens.. I went to use it, selected the cook time (microwave mode) and hit start. The display went black. i didn't hear a sound. it had only been (infrequently) for less than a year. No warranty-purchased at wal-mart as a display model. calling sharp was useless.. sent me to sears and they don't work on them. i didn't pay over $150 for it. what would be wrong with it, could it be fixed?

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  • foggyriver55 Jan 12, 2008

    sorry, it's a Sharp R-820BC model convection/microwave.

  • foggyriver55 Jan 22, 2008

    Thank you for your fast reply. I will be in touch if i can't get it fixed locally!

  • patnyc Jul 03, 2008

    Hi, I have the same problem - I pressed start on the touch-pad and it went blank immediately. Can someone let me know where the high voltage capacitor is located and can it be tested to make sure that this IS the PART that I need to replace. Thank you, Pat



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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.

I would suspect it needs a new high-voltage capacitor and a fuse.

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa:

Actually, we also have the full service manual for this model on our site, linked above.

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

Posted on Jan 12, 2008


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