Black screen... No device found...

Hi my packard bell iExtreme that i bought a couple of days ago has this problem especially when i play CoD Black ops. The computer goes in to some kinda sleep mode (i dont really know how to describe it) The screen and audio dissapears and the only way (exept ripping the cable from it) to shut it down, is manually on the start up button.
Is it hardware or a software problem?
Is there a reason it only happpens when i play CoD?

Drop into a command prompt and run "powercfg /requests" and paste the results back here please.

It says: C:\System32>powercfg/requests
DISPLAY:
None.

SYSTEM:
None.

AWAYMODE:
None.

Basically it says nothing is preventing sleep. So you can either turn off sleep in Control Panel\Power Options ... Advanced settings. Or you can try a little program like Don't Sleep. I did the first option so mine never sleeps but to save energy, especially for laptop users, you might be better off leaving it on and then just running that program when you run the old game; just remember to shut it off once you end the game or use it's timer function.

This is not a sleep issue. This is a "your computer is crashing" issue.

Can you please link me to the specs of this computer?

Packar bell iExtreme M860
Intel core i7 2600 3.40ghz
ram 8gb
64 bit
nvidiaGT 530

it happened again like a minute ago, i started a game and the fans started going really loud, my screen told me no input and the lights on the chassi were light as they are when the computer is on.

When is the last time you updated the drivers for this PC? When in doubt, get the newest Windows 64-bit drivers from their site. Reboot after they're installed, and see what happens.

Your PC is definitely crashing when the GPU is being activated for a game.

ive downloaded them like a few days ago, and it has crashed after ive downloaded...

Still crashing......