PC Monitor "Cable not connected"?

Recently had a new graphics card installed, however now I get "cable not connected" flash up on my monitor when I turn my PC on. It usually solves itself after reseting the PC a few times but it is very annoying. I've turned the integrated video card off in BIOS so i'm a little stuck as to what to... show more Recently had a new graphics card installed, however now I get "cable not connected" flash up on my monitor when I turn my PC on. It usually solves itself after reseting the PC a few times but it is very annoying. I've turned the integrated video card off in BIOS so i'm a little stuck as to what to do.

Thanks
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