OK, so I got a replacement Famicom, and I tried my disk system out for the first time. The system loads games quickly (at least the ones that I have), so it is probably not the belt, but there is a hum that comes through the speakers and the entire screen flickers occasionally. I cleaned the RAM adapter, and that didn't help. Regular Famicom games play without either of these problems. These problems occur before a disk is inserted as well (during the load screen). Please help!
Thanks.