Ok apologies for the delayed reponse,
Here are some instructions which may work
Try pressing the top right hand corner of the screen for 5 plus seconds, that should kick in the eject process for the dvd and tilt the screen in the process.
Also this may be useful
Hidden menu:
1. Turn key to on position
2. Press "Agree"
3. Press the "Audio" button
4. Press the volume knob (right side - Audio off)
5. The screen should be blank apart from "Audio off" at the top
6. Tap the left side of the screen, then tap the right. Repeat 6 times
The hidden menu should now show up