computer screen goes off after playing some games

[superman2014]

Hello everybody! My laptop's screen goes black while playing games or running 2 intel xtreme tuning stress tests aftet another for 5 mins. So I didn't have this problem for a year or so. I played games FIFA13, MW3, Assassins Creed 2 and 3 with no problem. Then I upgraded comp's RAM from 4GB to 6GB (I added 2GB more). And after that I noticed this problem. And ipdated my BIOS it was fine for a week and now Im experiencing the same problem. Help!

 

[smorizio]

check to see that all the laptop fans are moving air. try lifting the laptop off the table..leave an air space to see if the laptop over heating.

 

[superman2014]

[/quote]

check to see that all the laptop fans are moving air. try lifting the laptop off the table..leave an air space to see if the laptop over heating.

I tried that. I can hear fan's spinning sound. And I enabled "Fan always on" from BIOS