Probably a dirty laser might want to get a cleaning disc and try it.This is also caused by a weak laser which will cost more then the things worth.Discs can also be a problem on this machine as well,I have had good luck with the cheap memorex discs but bad luck with some of the others,I hope this helps you.I have had mine for about 3 yrs now and its giving me a lot of problems now,I don't think these are very good units and have read that the lasers don't last too long.I priced the drive thru Pioneer and they want a fortune for it.
Ed
September 2008