Whenever I start up a game my main monitor goes black, but, I can still hear the game out of my sound system. Dell S2417DG 1440p 144hz (or as least it's supposed to be 144hz but it won't change from 59hz) G-Sync using a DisplayPort for input, is my new main monitor. I have 3 other monitors all at 1080p 60hz all using HDMI input. This never happened before with 4 monitors all at 1080p 60hz. I have a GTX 980 and a i7-4770k if that helps. Also F11 option for my other programs works with no hang-ups. Also does not work even if all other displays are disconnected.