The Nexus 7 screen lift issue is a pretty well known issue on the XDA forums. For those who heaven’t heard, it is when the screen separates from the frame by a noticeable amount. There are many ways to fix it. Some have tried tightening the screws and removing the black foam strip. Others have tried the much more effective washer method. There is another way though—one that involves glue.
XDA Senior Member ckl_88 has posted a method that uses glue—specifically epoxy and not super glue—to fix the screen lift issue. In this method, users take the device apart, use toothpicks to prop the screen up slightly, and administer the epoxy. Once finished, they put the screws back in, and rubber band the device. After checking to be sure that the screen lift isn’t there, drop a phone book on it and find something else to do for about 12 hours.
This method has seen some success and ckl_88 has said that the Nexus 7 was put through a considerable amount of testing afterward without the screen lift coming back. While it is a little more messy than the washer method, it gives users another shot at fixing their device if the washer method doesn’t work.
XDA Forum Member shadeygeezer wrote up a similar method in ckl_88′s thread. In shadeygeezer’s method, you play the Transformers movie—or any other movie—on repeat for a little bit, then wrapped it in rubber bands and dropped a phone book on it. After leaving the movie on repeat for a few hours, leave it sit for 12 hours still with rubber bands and the phone book. Essentially, this is the same method as ckl_88′s but doesn’t involve taking the Nexus 7 apart and breaking the warranty. The logic being that you can reheat the glue already in the Nexus 7 and reset it.
While these will all likely help with the screen lift issue, none of them is really a permanent fix. To see more of the glue fix, check out the original thread. Here’s hoping Google’s next attempt at a tablet doesn’t have this problem._________