Crackling sound in output

I just purchased a used MCD 7008 cd player. I get a crackling sound from one of the analog outputs. I tried changing interconnects with no success, I switched the interconnects on the outputs from left to right and the crackling sound follows the switch from one side to the other. When I swithched cd players the sound went away eliminating the amplifier as a cause. Does not happen on all cds, maybe 50% of cds cause the sound to present itself. Contacted the seller and there was no issue in the past. Item was shipped cross country. Any help would be greatly appreciated.