Hum and Noise when Phono is selected on Sansui AU 317 amplifier
I have an older system consisting of an equalizer, Sansui AU317 amplifier and a 200watt Adcom GFA1 power amp. I recently re-assembled the unit, after a move, and when selecting Phono , or Phono Subsonic, there is hum and crackling noise. This happens even if the turntable is not plugged in to rear jack. Vinyl albums play, but there is constant noise. Any advice is greatly appreciated.