I believe there is a BIOS or driver issue. We don’t have any Dual display issue reported yet.
I double checked Asus website and the latest BIOS of the board H97M-plus is 2603.
I suggest you the following: Update the BIOS then, Chipset version 10.0.27 and Management Engine v. 184.108.40.2066.
Finally update the graphics driver version 4463
In regards to your video issue; I suggest you to test your system with a high speed HDMI cable. Also turn your TV on before turning on the pc.
In regards to the driver 4474, it is intended for 5th and 6th gen processors only.