Why Doesn’t MK20xx Touch Screen Work After Upgrade from CE .NET 4.1 to CE .NET 4.2?

Article ID: 28865892

Question

Why Doesn’t MK20xx Touch Screen Work After Upgrade from CE .NET 4.1 to CE .NET 4.2?

Facts

When upgrading the MK20xx all of the touch screen calibration settings are lost.

Answer

You must recalibrate the touch screen to enable it again.
  1.     Boot the MK20xx and allow it to enter desktop mode.
  2.     When in desktop mode, press the A, C, and D buttons simultaneously.  This will bring up the calibration screen and allow you to calibrate the touch screen.
  3.     After calibrating, press the A and B buttons to save the calibration settings.
  4.     The device will exit the calibration screen and return to the desktop screen.
  5.     The touch screen will now be enabled and working.