[Q] Android 4.1.1 touch screen calibration - Android Q&A, Help & Troubleshooting

Hello,
I recently got an Onda V712 tablet running Android 4.1.1 (with a capacitive screen). Sadly, the touch screen calibration is wrong. When I tap, the tap is registered in the wrong location, and some areas (the sides of the screen) are not accessible at all. I already tried this app: http://forum.xda-developers.com/showthread.php?t=934500 but it didn't do anything.
Is there any way in Android 4.1.1 to calibrate the touch screen mapping? Or does anyone know if there is a file that stores the calibration data that I could edit? I have root and adb and can access all screen locations using an USB mouse.
Thanks,
iwashere

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