Question about Sharp R-820B Convection/Microwave Oven
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: http://tinyurl.com/yzjozk
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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