HDMI input Dell U2713H

Hi all,

On my HDMI out from Adobe Premiere Pro (NVIDEA GeForce GTX750I) and Resolve 12 from the Mini Output card from Decklink, I get the message on my Dell U2713H no signal.

Cable is okay and the signal is also fine because on my other small monitor it is working fine. Tried to change the out through the whole range from 24P/60I etc. Nothing works. Is the only answer that my Dell is broken ore do I miss something?

I am running Yosemite 10.10.5 on a MacPro 2009 12core 3,06 GHz

Thanks,

Stephan