I am stumped.  I have a Trimble FMX that I cannot get the touchscreen to work.  Was working perfectly but when I came to the end it started beeping that end of row was near and I tried to cancel the warning but nothing would happen.  It continued to work OK but the touch screen would not function.  Finally re-booted and now I cannot get through the first steps because it will not accept my touch commands.  I can hear it beep when I hit the OK button but nothing happens.  Any sugestions?  Thanks!