You need to approach this in an organized way.
First, power everything off and disconnect everything from the amp except the speaker cables. Power on the amp. If you hear the noise then it's coming from the amp.
Next plug the interconnects into the amp but don't attach the cd player. Try again. If you hear the noise then it's the cables.
Next try the cd player without power it on.
Next power on the cd player.
Using this approach you should be able to locate the source of the problem.
Let us know what you find.
P.S. Remember to turn everything off when changing cables.
First, power everything off and disconnect everything from the amp except the speaker cables. Power on the amp. If you hear the noise then it's coming from the amp.
Next plug the interconnects into the amp but don't attach the cd player. Try again. If you hear the noise then it's the cables.
Next try the cd player without power it on.
Next power on the cd player.
Using this approach you should be able to locate the source of the problem.
Let us know what you find.
P.S. Remember to turn everything off when changing cables.