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I used to connect to a 2nd monitor and projectors all the time, but eversince my computer has been connected to a docking station I can't connect to a 2nd display withkout it. The monitor/projector shows it's attached, but i't doesn't pickup any signal and just goes to sleep.

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What OS are you using? What's your computer model? What cable are you using to connect it? Give us something to work with. – gronostaj Aug 30 '13 at 8:42
    
Window 7 Pro on a Dell Latitude E6410 Intel(R) Core(TM) i5 CPU 32-bit Operating System. And I don't know cables, but it's the one with the blue plug. – user249913 Aug 31 '13 at 10:49

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