2TroubleshootingProcedures
QOSMIOF50-QOSMIOF55-DYNABOOKQOSMIOF50SeriesMaintenanceManual 
29

2.10 OpticalDriveTroubleshooting

START
AudioCDfunctionsok?
END
Performsoftwarecheck
(Procedure3)
Performdiagnostictest
(Procedure4)
Performconnectionand
replacementcheck
(Procedure5)
PerformaudioCDcheck
(Procedure1)
Performdrive-
cleaningcheck
(Procedure2)
No
Yes
Replacesystemboard