I have an AV-48p575 projection tv. When plugged into ac power the sound thumps once a little then the relay on the power supply board clicks rapidly about ten times and the set shuts down. I do not have any signs of high voltage trying to come up when relay clicks. No shorts on horizontal output transistor or anywhere else that I can find. I am willing to replace board assembly complete but do not havea a schematic so can't determine if problem is power board of deflection board. If you have any tests that I could perform to narrow results or any kind of info I would appreciate it. Thank you Bruce N.

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