RCA 28-D-8525 (chassis KCS108C)
 

I've got an issue with this set which I recently restored. The picture has become snowy. Since the problem occurred so suddenly, I thought the RF modulator that I had attached to the set had failed, but I replaced it and the problem persists. I have checked all of the connections from the RF modulator into the tuner in the set and it all looks good.

Any help would be much appreciated! Thanks!