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
Thank you, Mike.
I have the recommended BIOS installed and the latest driver too, it's number is 4474. I've installed 4463th with the same effect.
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.
As for a hight speed HDMI, I have certain doubts. The computer had been seeing the second monitor for a short time until I resetted graphics settings to default with Ctrl+Atl+F8. Since then I've been having the problem.