Rega Saturn no longer reads CD's

In January, I purchased a used Saturn here on Audiogon, which was built in 2007. It would misread CD's now and again, but worked without incident most of the time. I thought it was a problem with the few CD's I tried to play, but they worked in my Naim player. As of last week, it would no longer read any CD's. After the initializing process, the display reads: "no disc". Per the Sound Organisation, I removed the power cord in an effort to "reboot" the system. It didn't work. If anyone can shed some light on this problem and, specifically, how I can resolve the problem, I would appreciate it quite a bit. Thanks.