Old School Sony Es R6 Car Stereo

Sold for Parts or Repair .Absolutly no returns . The radio powers up and kicks up FM stations but no sound or cassette play . May be an easy fix or good parts ...has the RARE  old style hard to find 7pin over under plug worth price alone  ..1 wire may be missing from plug.
Old School Sony ES R6 Car Stereo Cassette Mobile Audio Radio Shaft Knob Deck.
Shipping CONUS only ...