RF interference on TV

[Wolf9545]

I busted out my ColecoVision today and connected it to my LCD tv; I use a RF cable to an adapter (I think it is called a F style to a coxial) and that gets connected into a coxial cable right into my TV. I know all those cables work fine because I use the same setup for my old Sega Master System and I get a clean picture. When my ColecoVision is connected to my TV I get some interference on the screen even without any games in the system. I have opened up the system and sprayed contact cleaner on the RF switch and the power switch but that didn't seem to help. Any ideas?

 

Picture that is attached is the problem I am getting.

 

Oh, forgot to mention that I do not want to mod my console and change it to use any other type of video output (composite, etc). I like to try and keep my consoles as close to the original as possible.

Edited May 28, 2012 by Wolf9545

[nanochess]

I've an unmodded Colecovision and I've saw also bright points on RF, but only from time on time.

[Glossyluv]

I am getting this screen that comes up once and awile too.

[Wolf9545]

Sorry, maybe I choose the wrong image to post. I was more talking about the snow than the actual text. This image appears when you have no game inserted into the console or it can not read from the cartridge. The reason I choose that image is so no one can just say that the reason for the snow it a dirty cartridge. As you can see the screen is still readable but it would be nice to get a cleaner image. My Atari 2600 outputs a nice clean image using the same cables.