I had the exact same problems with my capture device! Make sure firstly that your U.S.B 2.0 are working properly. Next make sure that you put your standard of T.V in. I have a PAL T.V so why did I have the set it to NTSC??? Dont know but try it!!!! Next put your T.V to 50hz. You can do this via the Xbox dashboard. If that dosnt work......ask someone like Rippon
