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2TroubleshootingProcedures
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QOSMIOF50-QOSMIOF55-DYNABOOKQOSMIOF50SeriesMaintenanceManual 
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2.8 TouchPadTroubleshooting
START
END
TouchPadconnection
check(Procedure1)
TouchPadreplacement
check(Procedure2)
Replacesystemboard
Figure2-7Touchpadtroubleshootingprocess