I have a XPS M1210 with Windows XP. My video card is a NVIDIA GeForce Go 7400. I recently bought a LCD Samsung 42" LN40A530P1f and a VGA chord so I could use the TV as a 2nd monitor. I have done this before with my old PC monitor and everything went fine. When I get everything set up and switch my TV's source to PC there is nothing there, just black screen. My power button is blinking and it looks like it finds the source, but it stays black. I have tried to make it single view, duel view, and clone, but nothing changed the black screen. Anybody have any ideas what I can do to fix this? Thanks.