Hi guys/gals my names karl. I own a cheap AllWinner A23 9" tablet. its always done what I needed it too... and then.... I broke the digitizer. so, I replaced the screen with an exact replica ( I have made sure all connections are perfect.) and when I turned it on, the touch was out of sync. I touch the screen and it thinks I am touching a cm to the left. the scale changes tho, the more towards the bottom right of the screen I touch the closer to reality it gets, but the further left I touch the further from my finger it senses. I hope this makes sence to anyone. there are no calibration settings or apps that I can find. I hope you can help me. Thanks Karl.