While you wait for answers, we may have found some information which could help you.
Click here for Power Powered TurnPioneer DVR-210 showing no disc when inserting a dvd?
How can I fix my Pioneer XV-DV303 DVD/CD Receiver? ?
no disc ?
How do I finalize?
Why is my dvd unit making a buzzing sound?
Pioneer DVD/CD Receiver model XV-DV323?