[TVRO] HD Double Images . Ghosting.

[F]

Not related to  C band. But possibly interest to all. I know someone 
getting  Double Images on HD monitor. She replaced monitor . Same 
problem. Has Dish net HD system.           Used   Component ( red, 
blue, green) to  Audio/video switch receiver.         Then 25 feet 
component to monitor.,  All writing has double images. Like program 
guide. Letterrs are doubled.
Does anyone  know    what to look at first?