Been running a R9 290X for over a year now without much issue. Recently one of my LG Flatron W2753V monitors died. Ran my good two in 2x1 until I could figure out what I wanted to do.
Pulled the trigger on three new Asus VG278HE monitors. Used the cables that I have been using this whole time, but for some reason only two of my monitors are working in a group. Using two DVI-D cables to my left and center monitors and an HDMI to the third, right monitor; just as I have been for a long time. The HDMI monitor says "no signal" and then goes into sleep mode.
Updated the CCC to the latest. I'm able to run a 2x1 group and CCC sees my third monitor, but for some reason the third HDMI monitor shows "no signal" and then goes into sleep mode.