First of all I don't know if my problem it's screen related or rather graphic card related, so, here it is: Time to time (more or less every two weeks, or every month, it varies), my screen goes black, but PC keeps running as always; first screen on-off blue light and "Analog mode" on-screen message, then orange light and black screen (as if it was disconnected from computer, but I've revised the connections and they're alright). And after some time (10 or so reboots, only clicking computer on-off button), the screen works again, as always; then a month or so passes with the screen alright, and then I've the same problem again. I don't think it's my graphics card (but I'm not sure), since just yesterday I was playing Tomb Raider: Underworld, and Assassin's Creed at highest settings, 1680x1050, DX10, and it worked fine. My specs are as follow: OS: Windows Vista Home Premium 6.0 HP Pavilion Processor: Intel Core 2 Quad CPU Q8200 @ 2.33GHz (4CPUs), ~2.3GHz Memory: 4094 MB DX Version: DX11 (I didn't know I had DX11 until now that I've looked up system specs ) NVIDIA GeForce 9600 GS Total Aprox. Memory: 2540 MB (actually I guess it should be 512 MB or so). Well, any idea on what's going on with my screen ? Thanks for the help in advance !