[Q] Dead spot on touch screen??? Can't type "P" alphabet on keyboard!!

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http://forum.xda-developers.com – Hello, I've very weird problem. I can't type right upper most alphabet on keyboard (ie "P" or "З" in russian). If I type "P", it shows "O". I've tried other keyboards like swiftkey 3 , iTap keyboard but it's the same. can't type the alphabet "P". I've also tried full wipe and flashing again. formatting SD card. but no luck. I've tried re-calibrating keyboard in input setting. but it works for a few times. now i'ts not working again. When I type "P", it shows up "O" Anyone ever had that kind of issue? software re (HowTos)