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All was fine with my external monitor and my MBP...NO LONGER.
I can see the green light on the X-monitor...there is some message that flashes to quickly...something like the connection is active...but the screen is BLACK.
Help...
MacBook Pro, OS X Yosemite (10.10.4)
Flashing message on external monitor is "Input: DVI"
10.10.4 and my 17 inch Macbook Pro AND external monitor
