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OPTOMA EP739 'no signal'

EP739 Projector will not recognize any input signals. Problem seems to have started when it was connected incorrectly to DVD using VGA input with component cable. I believe green and blue were confused. Projector runs through its usual input signal scroll after startup, but no longer (where it once did) recognizes any signal grom VGA or RCA video in. I once used the item as a computer monitor, to display cable TV, DVDs... but no longer. Any ideas on how to solve this one? Any help would be greatly appreciated. Thanks.

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