panasonic dmr-ez37v?

The DVD drawer won't open. Despite utilizing the troubleshooting guidelines at rear of owners manual, and trying the "reset" button, holding the stop and CH up buttons at the same time for about 5 seconds, the door won't open. Tuning the unit off and on, unplugging and restarting, and using all the aforementioned options fail to open the door. Anyone have better options?