Black Screen while playing games...

Hello.. i really need some help!

When i start some games (some times they run sometimes there is blackscreen from begging or when scene change in game... monitor goes off). I can hear sound ... i also can fix with turning monitor off and back to ON...then works normaly for few mins and again scene change monitor goes OFF

its super annyoing so help me pelase!

It was working prfect for 1year ... two weeks ago i put new windows 7, and from then this error eats my soul

*I uninstal Nvidea driver.. and reinstall it (new one ofc.)
*I clear dust 2 weeks ago.
*CPU: max 65C GPU: max 65C on 100% load for 10min (when i do heaven benchmark, there is no blackscreen)
*HD tune pro test for error: NON
*Also install monitor driver, but still not better


My specs:
I5-3570k
GTX 670 2gb
MONITOR LG ips277L
8gb ram

Please help

Try a different monitor. turning a monitor on and off has no effect on anything other than the monitor. so the fact doing so temporarily fixes the issue, therss a vert high chance that its caused the issue.

hmm could be hdmi? its any diffrence betwen hdmi and VGA?

no DVI

well hdmi and dvi are digital signals where as vga is analogue.

basically you tend to get a sharper better picture with dvi/hdmi than you do with vga on a tft monitor as theyre digital themselves.

I also believe vga has a max resolution of something like 2600x1600, as back in the CRT days some monitors with very high resolutions required 2 signal inputs via vga

now i couldnt get monitor from sleep mode... so ON/OFF again... thats prove that something is wong with monitor right? not graphic card