Why does my screen goes blank after a period of inactivity?

[litwicki23]

Why does my screen sometimes goes blank after a period of inactivity ( like 8 hours )? And sometimes not!. My monitor screen just turns off ( yellow light ). Then i just turn my mouse and screen goes back to normal. ITS TOTALLY RANDOM!



I disabled the screen saver and I disabled the option of the OS turning off the screen. Yet, the screen will still turn itself off after a period of inactivity. I'm currently using a Asus Monitor 19'

Using this spec:

my pc is:
7 3770k 3.5 ghz
Asus Gtx 680
Asus Sabertooth Z77
2x4gb ram DDR3 Corsair Vengeance White 1600 LP Arctic
Be Quiet Dark Power Pro 1000W


drivers
301 WHQL.