[ca2l3vin]

Ok just wanted to report My findings with researching this issue

The issue is caused by 3 things but believe it or not they are both 2 different issues we are talking about.

After reading through alot if this thread I wondered if I could duplicate the issues you guys have been having so I could write up a product issue announcement through VZW (meaning VZW would call HTC and order them to investigate) and have sacrificed 2 (and my last) insurance replacements for the year.

First cause: Cosmetic Defect in screen

This is indeed appears to be more prevelant in early builds but can happen on ANY build. You can see it more clearly in florescent lighting or with a screen protector which slightly sticks to the screen pressing in on it. This defect however will not normally cause any issues unless it MOVES TO THE MIDDLE OF THE SCREEN. If it stays on the outside or close to the middle there wont be any effect or if it gets to the middle the touch screen will SLIGHTLY stop working in that spot. Im attempting to get more samples to send in to HTC but I am out of luck at this moment.

Second cause: Moisture/Oil on or even under the screen

This naturally is caused by moisture in the are and typically happens on any recessive touch screen. This is still normally a build issue as its supposed to be tight enough around the screen to avoid this but it can still happen (tried the pocket trick used earlier and low and behold a small marking popped up. This appears to have the same characteristics as the above however moisture/oil is never good and can kill the touchscreen if not repaired correctly.

Third cause: Vibration!!!/Pressure from stylus or Fingers

This one was a test I ran on the suggestion made earlier that basic abuse can cause the issue and this the layers on the screen somehow dislodges and doesnt work properly. I took a phone I was replacing with warranty(replacing for charger port but now using insurance to replace for screen) and left it upside down with the screen laying on top of my pc overnight (my pc has a vibration issue at this point though its VERY SLIGHT as in you wouldn't notice it unless you sat down and tried to pay attention and listen to it.) Low and behold this one was completely different almost. I got a rainbow rectangle that was slightly smaller than the entire screen and KILLED THE SCREENS TOUCH ABILITY. anything I pressed would not register for the most part and the phone then became completely unusable If you press inside the rectangle it would reveal more rainbow spots across the screen as you ran your fingers over it.

These findings were done with the VZW XV6850 Touch Pro so I have not been able to test sprint models at all at this point. If I get my hands on one that someone doesnt want then I may be able to test that when I get the chance. Again these are just MY findings and would not recommend anyone attemping these one a working TP. I will write a product issue on it to confirm the defect in the screen once I have a few more samples.