How to mend Hitachi Cp-vs50603

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

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projector has green spots?

help in finding used projector lamps for cheap?

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error in auto iris appear on my epson EX30 projector screen?

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is about a overhead projector?

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Multimedia Projector?

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how can I fix my projector?

What would cause bulbs not to work?

reset lamp hours?

lost power?

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Explain fixing damaged or broken tapes?

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

is it worth fixing or buying a new tele?