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Philips 42PF7320a/37 Plasma not working



My TV quit working last night. Here are the symptoms:

On the face of the TV I get a sequence of 7 red flashes. Back cover removed; I find a sequence of 3 green flashes indicating there is an issue w/ VSCAN.

Anyone have any testing methods to determine the cause or the culprit? I unplugged the power lead to the VSCAN board and the TV turned on without any errors. Plug the board back in and the errors resume.

Any help is greatly appreciated. Get technical, I can take it. The TV was purchased in 2006, and runs an average of 1100 hours per year.

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