No video signal via display port

My last play session was at least 2-3 weeks ago, everything was working fine up until then. I tried again today and while the game loaded up (I can hear the mouseover highlight sounds) there’s no visual display. Did you guys change something with video outputs? I don’t want to switch connections as I get SLI and G-sync through Display Port.

WoW, D3, and War3 all work fine; it’s just Starcraft that’s the issue.