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I have a mac mini (mi-2011) connected to a screen using an HDMI cable.

I have nothing on the screen except several second from time to time.

I tried to autodetect the monitor in the system preferences without success. Do you have an idea how I could push further diagnostic?

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Sounds like faulty hdmi cable!. does it work if you plug it in to your TV? –  Buscar웃 Sep 11 '13 at 12:34

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