Additional information from a question off another forum.
The entire trailer is 12 volt, running straight off the battery, solar charged.Research so far points to the type of motor in the 12 volt fan, and it's close proximity to the TV. My other source feels that the motor is emitting a low grade frequency, and because of the closess to the TV (about 2ft), it does not have time to filiter out. I Can't move the TV further away ( It's a teardrop) He suggests a simple shield. Believe it or not, he suggested a metal soup can, cleaned, and cut to surround the small electric motor, with about 1/2" clearance or more if possible. I am going to try this. It seems so odd, and simple, what if it worked.
"Toys"--2003 Dodge Dakota--TT Rimple"Gypsy"--1955 Boles Aero Travel Trailer--2002 Sweetwater 20' Pontoon--1982 22' Mcgregor sailboat..