When we watch local TV using the batwing antenna and our laptop is running the laptop causes interference on the TV screen. It's worse if watching a weak signal, but never has been so bad as to be more than just an annoyance.
As for the front and rear TVs - start by verifying the setting of the Selector Switch for each set. If watching cable, make certain Cable is selected for each TV.
Then, using each TV's remote, you must do a channel scan from the on screen menu.
Hope this helps some.
Oh, yeah. If using the batwing, don't forget to turn on the "TV Ant. Power" on the selector box.
'14 Winnebago Vista 35F, '14 GMC Terrain
BlueOx Towing Pkg, SMI Stay-n-Play
49 States & 7 Provinces visited in MH | WIT W112365