Nothing , but when i am playing games like Fifa11 or COD4 Multiplayer also other ones , i always have this black screen flash with "Signal Not Detected" showed on the screen , then it back to work again and i can play .
i had saved before a pic of the alert message ( in the taskbar ) of this error , if it might help
what might be the mean factor that causing this problem ?? should i run tests on VGA or CPU or RAM or any something else?!
these also my Spec:
Gigabyte GeForce GTX 260 S.O.C
Intel(R) Core(TM)2 Duo CPU E7200 @ 2.53GHz, 2533 MHz
Windows 7 Ultimate x64
Do you have another socket to plug your graphics card into? If so, try doing that and see if it stops the problem.
If not, then this is what I would do. Uninstall all nvidia drivers. Run Driver Sweeper (you can google and download it) and remove all nvidia drivers with it. Then restart the computer and see if windows gets a driver. If it does, then try playing your games and see if you still have the issue. If windows doesn't find a driver, then install the one from nvidia and then try. If you have the original CD that came with your graphics card, try that driver and see how it works.
Socket to plug the graphics card into the motherboard. You'll have to open your computer to see if there is another one. If so, just take the graphics card out gently and then plug it into the other socket.