I have a Dell Precision M70 laptop with Windows XP. It has an nVidia Quadro FX Go1400 video card, which means it has a plug in the back and came with a cable that allows video out in the form of analog video (RCA), component video (YPbPr), and S-video. Analog video out is shared with Pb out. I have been using the normal analog video (yellow cable) connection with my HDTV and have obviously been disappointed with the image quality. Today I bought a component cable (YCbCr) and hooked up the laptop and TV. What I get on the TV is a purple picture. It seems as though the Cr connection is not being recognized. When I unplug the Cr cable nothing changes, but when I unplug either of the other two cables the picture changes/goes away. I tested the new component cable with my progressive scan DVD player, and it worked just fine. I thought there was a possibility that something labeled YPbPr would not be compatible with a YCbCr cable, but in the case of my DVD player they were compatible. I'm stumped, any of you have an idea? Thanks!