Im not very experienced, (name says that), but..... If the display is switching off just past the logo start up screen, then i think that the driver isn't installed properly. i had this once and used the TV out as a way of seeing the account page thus allowing you to make alterations. On mine, when the display went off it read "video output out of range" and the TV out is then enabled. I had a video lead that connects at the back and connects to my TV. Try it. Hope it works.