Pioneer TV - screen flip doesn't work properly

hey guys i have a pioneer TV in my honda accord...but recently the flip started to stuff up. when the engine is turned off the screen should slide into its place however, with mine it only closes half way and stays there.

Does any1 knoe wat seems to be the problem any help will do

At the moment the screen is open and has been opened all this time. its only a matter of time when some1 sees it and breaks into my car which i dun want to happen lol.

cheers guys