I have some lines in my picture. They look like 60 cycle hum bars. I have tried everthing to make them go away. Thare are 8 tv in the house. From cable outside into a channel plus two way splitter. One side goes to cable modem, and the other into a DA-500.
From the DA into a 8 way splitter. Out side there is a ground block and the ground is hooked up. The one cable Jack that is not being used has a 75 ohm terminator on it and I have one hdtv cable box on the big screen. WEhat can I do next.