Screen sometimes doent come out

Sorry was a bad link should be:

http://www.audiovox.com/

Click on Jensen, select multimedia, then select "older models" and half way down you will find the link to the manual.

After a bit of research, it sounds like there are two possibilities for your problem - low voltage to the unit as a whole - think if the sometimes when it is slow to open is when you have the volume turned up - maybe the amplifier is drawing too much current for the circuit.

If you are comfortable using a multimeter, identify the power terminals on the supply plug using the installation manual at the link above, then check the no-load voltage - if it is low (less than 12.8 volts) then suspect either the car battery or the connection/cabling/fuse housing to the player.

Second possibility is that the screen ejection motor has failed, which is rare - check to hear if there are any gear grinding noises, however quiet when you try and extend or retract the screen, or any sound of vibration which may indicate a motor problem. These motors are probably not too expensive, but fitting them would probably be a job for a professional.

Hope this helps more :)