[geekocd]

Unfortunately had the same thing happen to me about 2 months ago. Out of the blue touchscreen basically became totally non-functional even after hard resetting (I also ended up on the same screen you're stuck on). No water damage. I had a custom ROM and lots of tweaks so getting it reflashed to stock ROM and re-locking with HSPL and all without a working screen was pretty interesting...but needless to say, I got it all done and brought it in (I have TEP) and they replaced the whole device for free. Think that's probably your next step, best of luck.