dvd turns off/wont start if opened more than a few inches?

the rse in my 07' chevy silverado will stop showing movie, read res error and spit disk out if the screen is opened all the way opened. This is a relatively new problem a few previous problems with movies freezing. It also seems to be getting worse- it was I could open it most of the way but now it is less ans less and only afew inches or so. Any ideas or suggestions? Loose wires?