How to fix a loose laptop screen
All laptops are slightly different, but the design and position of laptop hinges is generally the same across all models. Unless you have a Mac. As Apple puts its products together in a very different way, it's difficult to open up a Mac laptop screen. For more information on how to fix a loose laptop screen on a Mac, visit ifixit.com. Remember: do not attempt this if your laptop is still under warranty as you will invalidate it. Take it back to the retailer to repair.
Before you start
Turn off the laptop and remove the battery (refer to your instruction manual on how to do this).
Open the screen
Look at the laptop screen. You should see several rubber plugs in the corners of the lid. There will probably be two plugs near to the hinges, and either two or four plugs at the top of the screen. Pop the plugs out using a sharp knife, and put them to one side. There should be screws underneath the rubber plugs. Remove the screws and set them to one side, but pay attention to the length of the screws, and make a note of where each screw comes from.
You should now be able to slide your fingernail down the outside seam of the lid, and pop the plastic front/bezel from around the outside of the screen (illustration A). The bezel is held in place by plastic clips. It should not require much force to remove the bezel. If you find yourself struggling to remove the plastic bezel, check that you have not missed any screws.
Tighten the hinges
Now that the screen is open, you should be able to see the hinges at the bottom left and right-hand side of the screen. Tighten any screws that are on the hinge (B), and then replace the bezel by clicking it back into place, then replacing the screws and rubber plugs.If the hinge is now rigid, you can stop.
If that doesn't work
Close the lid and turn it around so that the back is facing you. Some laptops have a plastic cover that hides the hinge mechanism. To remove this, unscrew any screws that may be holding it in place. The screws that hold the hinge covers should be near to the hinges on the rear of the laptop, but some models may have screws on the bottom, too. If you can not figure out which screws that you need to remove, you should consult an engineer and ask them to tighten the hinges for you.
Once you have removed the screws, try to remove the panel that covers the hinges. The panel should pop out quite easily, but may be held in place by plastic clips. Once the panel is removed and the hinge is exposed, you can tighten the screws on the hinge, and reassemble the laptop.
If the hinge is still loose, then the laptop hinge may be damaged, and should be replaced by a professional.