HTC now has an in store fix for the flying screen syndrome but you can do this at home. Take a credit card or similar type of item and wedge it in between the screen and the phones frame lifting the screen bottom as much as you can without causing further lifting damage. Then remove the battery door and locate the two holes in the photo with the tooth picks. Put a couple drops of crazy glue in each hole then remove the credit cards and quickly clamp the screen down for about a half hour. Clothes pins might work as make shift clamps try therm before starting. If you can get your screen up enough to put the crazy glue tip directly under the screen you can do this also but use very little glue and dot it maybe 4 times across the area for a good even hold then clamp. I would tape off the screen and phone frame just in case some leaks out by accident doing this method. Once the screen is secure use automotive black silicone adhesive sealant I like Permatex brand found at WalMart (now this stuff can also be used to glue the screen down but will take longer to dry 12 hours put it on a tooth pick and shove it under the lifted screen bottom then clamp) You can take this black silicone and dab a small amount around the screen crack and with your finger or a q tip force it in the light leak crack then simply take a tissue and wipe off any excess silicone before it sets you will have no damage to the phone from spilling it just wipe it off. You should now just have a tiny bit shoved in the crack with all the rest wiped off. let it set and you are done!