1.Touch a blank area of the touch screen.
2.Touch the 
icon.
3.Scroll through the SYSTEM RUNTIME settings with the 
or 
sign to see the system runtime in hours for TODAY, YESTERDAY, the CURRENT MONTH or the
LAST MONTH.
4.Touch and hold the 
icon for 3 seconds to reset the counters.
5.Touch 
to return to the main screen.
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