To fix a laptop with a loose screen hinge, it’s suggested to follow these steps:

1. Identify what part of the hinge is loose.
2. Re-tighten the screws holding the hinge to the laptop body with a Phillips-head screwdriver.
3. If the hinge is not stable after retightening, apply lubricating oil to the part that is loose.
4. Put the laptop in an upright position and bend the hinge gently and firmly in the opposite direction.
5. Clean up the area and test the looseness of the hinge.