Sony Walkman WM-D6C Personal Cassette Player "sound comes tape player" Questions

sound on one side of the headphones when jack is put into the outlet for the headphones. i know it's not the headphones because i've tried other ones too...i know it must be a bad connection but don't

...tape player does not play fast forward or rewind it just makes a weird sound like it wants to go??? the belt has failed, replacments will be very hard to come by I agree the belt is broke and most ...