I had the same problem. I downloaded the Service Manual from Manuals Paradise. The Manual says that the self diagnostic will report 12 - 22 and then 99 for a dead panel. I figured since I was only getting the 12 -22, it was stuck in a loop from a failure somewhere else. I had a Sony Repair Rep look at it, and as soon as he turned it on and saw the screen blink, he told me the panel was bad.

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