Aspire XC-780 screen keeps going black

Moraygirl
Moraygirl Member Posts: 2 New User

New Aspire XC-780. Have tried to set it up today. My monitor to pc cable on  previous pc was a VGA connection. New Acer has no VGA connection so I have used new HDMI cable. The screen goes black around every 20/25 seconds - really annoying. I have switched all off and checked cables etc but still the same. Am I missing something? Should I go buy a DVI cable instead? 

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