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screen keeps flashing when try to attach Acer AL1916 external monitor.

i have a new macbook pro and when i try to attach a Acer AL1916 External monitor the main monitor start flashing for about 10 min. and stops with out recognizing new monitor. i am connecting external monitor with a HDMI to VGA adapter. i am also running Yosemite version 10.10.5. what can i do to get external monitor to work properly?

MacBook Pro with Retina display, OS X Yosemite (10.10.5)

Posted on Aug 31, 2015 11:11 AM

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Posted on Sep 3, 2015 6:01 AM

Found the problem. the HDMI to VGA cable has a connection on it for USB power. i just happen to have the same connector on my headset. once i plugged in the power cable into this port and into a USB port the monitor came right up. so, if cable has a power connection, use it.

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screen keeps flashing when try to attach Acer AL1916 external monitor.

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