It could be this factory fault; After playing a CD with more than apprx 50-55 minutes on it, when loading a new CD the laser block does not move to track zero before the servo times out, then the CD is ejected. One more attempt will allow for the rest of the travel and it will play.
It seems to occur only in machines within the serial number range 3375001 to 3409009.
There's an electronic fix for this problem in that you put a 33Kohm resistor in parallel with capacitor 7C801.
Martin