Try running a h.d.m.i. cable straight from cable box to t.v. If that doesn't help try running componit cables from box to t.v. If that does not correct then its got to be the cable box, Also Check out the Dish Network 211 hi-def system There hi-def package is great 5 channels of VOOM for $5.00 more per month. I have had the dish hi-def system for 3 years and the picture and sound are stunning Also you can throw up an outside antenna and pick up your local channels and the local channels will appear in the program guide other wise I believe dish charges $5.00 extra for the network channels but I receive 9 local channels with a cheap antenna please post back if this helps steweeeeeeeeee