Some quick tips: Use a hair dryer/heat gun to loosen the glue under the edges of the screen. Use a guitar pick to pry the screen up (avoid screwdrivers unless you want to scratch and possibly crack your screen edges). Use some unheated solder to make your tiny shim. Cut it with an Xacto blade (very thin) and flatten it (solder is soft and malleable) to remove any burrs. Use a dab of super glue on the contact spot and place your shim with some fine tweezers directly in the middle of the spot. Let dry, test, and reassemble. You can use super glue to affix your screen back in place, it works just fine. I used Scotch Super Glue Gel, its thick, easy to manage and sticks strong.