Question No signal!

Paneaplepen

Honorable
Mar 26, 2017
11
1
10,515
Hello, i have very strange problem recently. When i start watching a video (Youtube, Twitch etc) my monitor turns black and it says no signal. When i turn it off and then on again this problem does not happen again untill i restart the pc. I have connected second monitor as well and it doesn`t happen to it. I have checked the cable connection(BP) and it looks ok.
Any suggestions? Thank you
 
my pc spec is I7700k, GTX 1080, 16bg RAM,
Main monitor is
Acer XZ350CUbmijphz 35 Inch FHD Curved 2000R Gaming Monitor
I use my TV as second monitor:
Philips 55PUS6754/12 55-Inch 4K UHD Smart TV