recently I've bought a new 23" HP Compaq LA2306x monitor for my Lenovo Y50-70 laptop. Connected it via HDMI (from laptop) to DVI (monitor) cable and at first it seemed to worked flawlessly from the very beginning. And still works, until I run a game. I've tried playing Dishonored, which works flawlessly at highest resolution and medium/high graphic quality settings on my laptop, but after about 15 minutes the screen went completely black for about a second or two, and then turned back to normal. As if the power cable was plugged out for a second. After that it happens more and more often until the game is practically unplayable. In Portal 2 it doesn't seem to happen so often, but still does. When I browse the web, watch movies etc. everything works perfectly.
My laptop is getting warm after playing, but since I have a cooling pad under him, and it never caused any screen freezes or framerate drops, while using my laptop's screen it was never a problem to me. I play at the exact same graphic settings as before. Is it because of the overheating? The graphic card is too weak? Problem with a cable?
nVidia GeForce GTX 860M
Intel Core i7-4710HQ @ 2.50 GHz
Monitor's refresh rate: 60 Hz