HT201177: Get help with video issues on external displays connected to your Mac
Learn about Get help with video issues on external displays connected to your Mac
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Helpful answers
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Dec 26, 2012 9:38 AM in response to Mra.solisby Klaus1,Plug it in to a power supply.
What Mac is it?
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Dec 26, 2012 9:50 AM in response to Mra.solisby WZZZ,That snide answer you have received apart, more details needed. What have you tried? What happens when you try to start up? Do you get the chime? Have you tried a different power outlet? Is the power cord secure in the back?