Display keeps blacking out

[tank234]

So I have just recently been having this issue with my screen and have no idea what could be causing this. My monitor keeps losing connection randomly from time to time. I have checked all the cables and everything is in properly. I tried to reset my display driver by pressing windows key, ctrl,shift, and b. But still same issue is happening. It blacks out for about 3 seconds and then is back to normal. I have two monitors it only happens on my main display (benq 27 inch) while the other one is working just fine. Any help is appreciated.

 

My system specs 

i7-8700

16gb ddr4  2666mhz

dell motherboard 

1050ti 

corsair 450w bronze power supply 

and a 60hz 27 inch 1080p benq display