[Nexus 7 General] badasscat:
Except that this is not what's happening.

And I know this by one simple fact: I *do* have this problem of the tape losing adhesion, in one tiny little area near the top left. You can easily see it when this happens, as you can see it with *any* glass that's taped to something else with double-sided tape that you then start to slowly detach. You can see a discolored area and a border around the affected area where the tape's still attached.

This happens to my N7 when I start to get obsessive and begin pressing down hard on the rest of the left side of the screen to try to make it flat. What happens is the top part of the screen "rocks" when you do this - because you're *not* actually pressing the screen flat, you're pressing it *inward*. So you're actually putting pressure on the top and bottom of the screen to lift when you press the middle.

If I take my shirt and just wipe the top left of the screen for a while when I notice this happening, it goes away (I've re-adhered that little spot).

This is not what's happening on the rest of the screen.

If you open the back up, it's completely obvious what's actually happening, and in the 87 page long thread about screen lift, we all pretty much figured it out but decided there's nothing we can really do about it (or really need to do about it). The problem is the thickness of the stuff inside the N7 exceeds the thickness of the space provided for it! That's really all it is; very simple. ASUS apparently assumed the glass and back cover would be strong enough to compress all that stuff, but they aren't. So that stuff is pressing against the back cover of the tablet and the *entire* screen assembly. It's pressing on the screen assembly from the back, so if anything it's *helping* it to adhere in that area.

It's hard to know *exactly* what part is really exerting too much pressure, or if it's just a combination of a lot of little things. There is a big piece of foam and there are some weird-looking metal clips or pins back there and it could be any or all of those things, or even something else. My guess is that the problem is actually those metal pins (because people tried cutting the foam and that didn't work, and anyway it seems like the foam should compress), but I don't want to mess with them because I'm not even sure what they actually do.

Most people also noticed that when they opened up their N7, the screen lift went away temporarily. This is because the pressure is relieved with the back cover off. Some people (including myself) also had the screen lift "fixed" once the cover was popped back on - without doing anything! But this is temporary too, because it just takes a little while for the case and glass to start sagging again under the pressure.

If I thought my screen was actually "separating" from the tablet, I would return it. It is clearly not - that is not what causes screen lift. ASUS just made the innards of this thing slightly too thick for the case. Excess pressure is no good either but it's not pressing directly on the glass, it's pressing on the components behind the glass - including the frame with the tape on it. So it's not really a problem for the screen, it's pretty much entirely cosmetic.

Again, I would love to see the insides of a C80 unit, which are supposedly fixed, in direct comparison with a C60. Then we'd know what they fixed and maybe C60 owners could come up with a real DIY solution (assuming any of them care once they know what's actually causing it).