Outer Limits 4x4 Board

i have wired up a new dvd and screen, iv done all the wiring......
2 yellows to batt
2 red to ignition
2 black to earth.
remote and rca's to amp.
now the player plays the dvd and it comes up on the screen for 2 seconds and then goes dark but is still there just.
does anyone know if its a wrong setting or faulty screen?
iknow its not a color,contrast, tint or av setting.

could it be a flat battery? went to start my car and its only 9volts, radio still working dvd still plays and still same prob

THANKS all fixed