When you have executed system recovery on the E4982A, you have to calibrate the touch screen. Follow the procedure described below to calibrate the touch screen.
Press System to activate the softkey menu.
Click Misc Setup > Adjust Touch Screen...
The touch screen calibration screen appears.
Touch the x mark on the upper left with your finger. The mark x also appears on the lower left, upper right, and lower right. Touch the x marks in that order with your finger.
Touching all the four locations described above with your finger automatically concludes the touch screen calibration.
With no operation on the touch screen calibration screen for a preset time, it automatically closes and the previous measurement screen reappears.