My new screen did not have a ribbon cable so I pulled the one off the broken screen. It is NOT held in with a ZIF connector- just slide it back. When I got it all put back together, I though I had the wrong screen. I pulled it apart and adjusted the cable and faintly saw "Goo" on half of the screen. I then pulled the screws, and like a bad repair guy, left it hooked up and carefully moved my board while powering it on. There is an angle I can hold it at where everything will light up, but it won't stay on, so I went ahead and ordered a new ribbon cable. I've looked at my current cable with a microscope, and I can't really see a problem, but it is definitely there.
Summary - the cable is a friction fit, and very delicate. Even if it doesn't look broken, if you're having problems when you put it all back together, look at the screen under high light when you try to power it on. If you see any part of a "ghost image", try the cable. If you're wondering if the screen is the correct one, compare the numbers.