84 Chapter 5 Error Conditions, Problems, and SolutionsCalibrate the Touch ScreenCalibrate the Touch ScreenWhen to doCalibrate the touch screen if the buttons do not operate or the buttons do not operatecorrectly.Attention: Use a pencil, the blunt end of a pen or a palm top wand for thisprocedure. Do not use a sharp object. Sharp objects damage the screen.Procedure1. Touch the STOP button 5 times.2. Follow the instructions on the touch screen.3. Touch DONE in the centre of the screen.
