I have a Samsung DLP rear projecion TV. He is 7 years old. History of symptoms: Occasional high pitched whine on and off for years. Used to shut off and flash "Lamp" now will stay on but there is a very loud screaming/whirring sound that continues for a few moments after the set is turned off. I am trying to differentiate between cleaning/oiling/replacing the fan and replacing the lamp or the color wheel. Any troubleshooting ideas would be greatly appreciated.
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