CDJ900 ejects/loads continously on it's own!?!?

Okay so I finally used the CDJs with CDs for a session, and afterwards one of my CDJ900s will constantly eject/load on it's own when there's no CD present inside of it. Once you stick a CD in, it's fine, however if you don't have a CD in . Is there an easy fix to this? I've only had the CDJs since July. It's great that there's a warranty on them still, but to wait about a month after sending them in to get them back is not practical if you've got a gig every weekend!