Monitor goes into standby when launching 'some' games

[phr4n]

I just purchased a few games on the brilliant offers on steam, the first one I downloaded was stalker - when I try to launch this game the monitor goes into standby and system does not respond, the same for a previously purchased and installed saints row2. I am using Win7-32 ultimate and my psu is a galaxy enermax 1kw, also im on 9.11 drivers for the 5850, any help is appreciated

 

[PMKeates]

Does the system actually power down? Is there audio?

 

[chaparral]

You may find the answer here http://forums.overclockers.co.uk/showthread.php?t=18093998

Or here http://forums.overclockers.co.uk/showthread.php?t=18094012