No Signal with HDMI to TV

I just bought & hooked up my Mac Mini to my Samsung TV via HDMI Cable and it just says 'no signal'
I've googled the problem but can't get anywhere, tried it with multiple cables which all work with my apple tv but i can't get anywhere with the Mini
Any help would be greatly appreciated
thanks

Hi there,
I'm having the exact same issue at the moment which Apple and another vendor have been unable to fix. However, they've only tried replacing the logic board, which leads me to think this is a software issue introduced by the 10.10.1 update (which, ironically, was introduced to prevent signal loss when waking from sleep). I'm not sure if an update has been released to fix this but I'd recommend calling Apple and getting them to sort it, especially as you've only just purchased the machine.
If your display has a VGA connection, I'd ask them to provide you with the Thunderbolt/MiniDisplay to VGA adaptor.
Hope you get it sorted.
Best,
R

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