My HTC HD2 screen stopped responding. It will work one time but not the other. Sometimes is was almost impossible to get it unlocked. Very frustrating. I am running a custom rom from xda developers using this tutorial http://www.jayceooi.com/2011/08/15/how-to-install-cwm-nand-android-on-htc-hd2-video/ (great tutorial).
Anyway, I did some research and found that there were many solutions for getting the screen to work responsibly. It seems that resetting the phone back to stock Window 6.5 did not work for many people. Sending it back to HTC, TMobile or getting it repaired at a local shop were among the options. But then, I found this solution “press down hard enough on the end call button”. This solution seem crazy. But I figure I start with the simplest solution and scale up. So I tried it and guess what, it worked. So far so good.
I guess I will update this post if something changes. By the way, I found this solution on the xda developers forum http://forum.xda-developers.com/showthread.php?t=1213809
I will keep track to see if the problems returns. If you having this issue, try this first before you send it out for repair. Good luck.