My screen turns off while playing games

[Orester]

My laptop screen turns off while I play games.I have cleaned the dust from it,also I have a cooler pad.While gaming my videocard temp it's 68-70c.This happening for 2 months now.
Please help me what I can do?

 

[bennie101]

If your playing while using it on battery then check out your power options that may help but even tho you have clean the pc out from dust and what not you may be taxing the system laptop too much which may cause this.