Audiolab 8200CD white noise/distortion

Hello there,

I have a problem with my new Audiolab 8200cd/Roksan Kandy K2. If I unplug the connected USB cable from either the computer or cd player, I get white noise and a very distorted signal through the amplifier. If I change inputs on the amp or reset the cd player, the signal returns to normal. It only happens with the Roksan Kandy K2. I have tried to recreate the problem with an old Arcam amp and it doesn't happen.

I'm not sure what is happening, whether it's normal or if there is a fault on one of the components. I was just wondering if anyone else had come across this issue? Any input would be greatly appreciated.