Ribbon Defect, or something is wrong with the Flip

if its still in warranty see if nokia will swap it our for you

I have a nokia 6133, a really great phone. however recently, when i open the device, the main screen will be completely black. that is, unless, i pinch the top left corner of top half of the phone. Sometimes light will stay on after i pinch it once, sometimes i have to hold my fingers in place just so the light will stay on. anyways, i can't figure out how to take this thing apart to see whats wrong. im thinking i got sand in it while i was at the beach.

anyone know how to take off the front panel of a nokia 6133?