I cannot callibrate the screen of my Nokia N810 anymore. The touch screen is not correct at the moment, I have to click about 1cm to the left to hit a button.

The screen calibration tells me to "click closer to the center" when I try to callibrate the screen (and click right on the center dot). I have to click to the outest circle to proceed with callibration. It happens only to the 2 left callibration marks (1 and 4).

Any help or hints?