You have a problem with a Cd which is stuck in the transport carriage. If there is no way that you can retrieve do not try to wriggle this out as you might do more damage. You will need to take the player out of the dash and open the top lid.look inside for a CD that would have warped or broken and not being able to come out. Carefully see if the disc can be taken out without damaging the carriage, do not use force, if the loading motor could be accesssed then it becomes easier but do it only if your are confident., Once you get the cd out , reconnect and check if the set will perform. otherwise there could be further failure of the drive circuit, open connection to motor or failure of the pcb. Hope my advice is useful Good day