Boy, I had never cared about this until you pointed it out. I took my head phones off, stopped my CD, started it again, my 640C V2 clicked, a little bit. I still don't care. It has tremendously good sound for the cost - not high-end per say - but lots going on in there.
I owned a Version 1 for a while too, and it ran flawlessly. Sorry about the motor whirring noise, some of the earlier models had problems with transformer hum, and now the drive too? Shame on Cambridge. If you can document the timing of your complaints, you should be able to get the problem covered under warranty. Ask them for a new Version 2 to replace yours.
I owned a Version 1 for a while too, and it ran flawlessly. Sorry about the motor whirring noise, some of the earlier models had problems with transformer hum, and now the drive too? Shame on Cambridge. If you can document the timing of your complaints, you should be able to get the problem covered under warranty. Ask them for a new Version 2 to replace yours.