I have an original front loading NES with a problem I have been unable to solve. The composite audio output buzzes unless I wiggle with the cables. If it helps at all, the MODEL NO is NES-001 and the copyright is 1985, though that doesn't seem to be relevant to when and where this unit was manufactured.
I can get the audio to stop buzzing by readjusting the composite cables every time I start a game. It doesn't seem to matter where I leave them, the next game will buzz anyway, especially on title screens with bright backgrounds.
It all seems like it should be easy to fix, but I haven't found anything obvious on the board, or with the capacitors, outside of the shielded composite out box.
Any help would be appreciated.