Half of screen is black on startup

by vterry1 - 3/15/13 7:57 AM

Hi I have a 42 in LED flat panel, not sure of model as i'm at work but here is my problem.
After Dish installed service, 1st initial power up in the morning only half the screen is clear the other is either black or has vertical lines. after 5 to 10 min it all comes in and is clear. this happens every morning. does anyone else have this problem? any help on a solution would be helpful.