Ticking noise in Audio Research Reference CD7


Hi,
I have a relatively new CD7 (probably with about 1,500 hours on it) and it recently started making this ticking noise each time I press "play" or move between tracks ("forward" or "backward"). While just playing the noise isn't there.

Any ideas where this noise could be coming from/caused by?

Thanks.
amuseb
elberoth2, I guess replacing the cd-pro2 is a straight forward drop in that doesn't call for any specific ARC SW modifications or such, isn't it?
Thanks elberoth2.
BTW, I spoke to ARC and they claim they "modify the cd-pro2" but I don't really believe them and assume this is said for commercial reasons only.
I have to take my words regarding ARC back.

Actually, the cd-pro2 isn't a drop in replacement as the CD7 version needs a connector on position CL16 for the clock signal, this connector isn't part of the standard cd-pro2 transport sold by daisy or any of it's resellers.
Elberoth2, have you seen cd-pro2 units that come built in with the CL16 connector on the PCB?
would you know where I could get those?
thanks.