I have an Alienware M17xR3 laptop and the AMD Radeon HD 6900M Series graphics card has sudennly stoped working. At the time I was watching a YouTube Video when the screen flashed and went blank. I turned my laptop on and off again, and I got a white screen. I've tried to install the latest AMD driver, but when i do the required reboot, after it passes the logon screen i get a black screen with a flashing dash in the top left corner. I've tried installing older versions and I either get a blank screen or a white screen. I don't know if this is a hardware or a software issue. I've also had the laptop since late 2011.