How to mend Optoma H79

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Multimedia Projector?

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I show a dark spot when I have a blue screen?

help in finding used projector lamps for cheap?

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Projector bulbs?

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projector has green spots?

i replaced the bulb followed step by step and still nothing happens any?

reset lamp hours?

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is about a overhead projector?

is it worth fixing or buying a new tele?

Explain fixing damaged or broken tapes?

Panasonic password reset?

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how can I fix my projector?

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