inteference in headrest tv

i installed two headret tv in my car and there are lines appearing on the screen when the engine is all the way on when i turn off the engine the lines go away a lil bit but they are still there, the picture also gets brighter when the engine is all the way on. i installed a noise filter and it helped a lil but they are still there, i also checked my grounds, changed my power source but nothing completely took it away. i also have a 10.4 inch flip down which the noise filter got rid of the lines completely,  but it wont work for the headrest tv.  wat do i do?  

I suggest running your wires for the headrest screens a different way.  Maybe they are close to a ECU computer or something.  I'd also give a video amplifier a try since you mentioned that you also have a overhead dropdown screen.  Maybe the boosted video signal will solve your problems.  Good Luck.

i do have a video amplifier but that didn't help with the lines. when u say run my wires for the headrest a different way wat other way can i run it

well right now my wires are not ran through the center console, i have them going down the seat and down the door panel, under  the back seat and connected in the trunk along with the video amplifier