My lg tv says no signal when I connect to my macbook pro on the rgb/vga

my lg tv says no signal when I connect to my macbook pro on the rgb/vga port. I have tried my windows pc as well, different cables, changed screen resolution but no joy. Help please.

Possibly because you haven't told the TV which input port to find your MBP on?

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    ============================
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    =====================
    If using a  Linksys router, contact LinkSys Customer Support and/or post in their forums.
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    ***@***********.com
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