Using a digital projector

I am connecting my macbook pro to an epson digital overhead projector and I have had it working for a few months. Today I connected it and it would not work, i tried rebooting changing projectors changing display settings but nothing worked. What could have happened?????

no i didnt just upgrade and it worked fine before but then i shut off the projector and turned it on later and it wouldnt work. I also tried detect displays but that didnt help either

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    New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read more
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    2000:1
    Projection techniques:
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    PO:
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    Shot size:
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    Audio Formats:
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    PID:
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    Video Formats:
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    Quantity:
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    Image:
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