2TroubleshootingProcedures
QOSMIOF50-QOSMIOF55-DYNABOOKQOSMIOF50SeriesMaintenanceManual 
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Procedure4 Connectioncheckandreplacementcheck
Theopticaldriveconnectstothesystemboard.Thedrivemaybedisconnected,orthedrive
orsystemboardmaybedamaged.Disassemblethecomputerfollowingthestepsdescribedin
Chapter4,ReplacementProcedures,andperformthefollowingchecks:
 
Check1 Makesurethedriveisfirmlyconnectedtothesystemboard.Iftheconnectionis
goodandthereisstillanerror,gotoCheck2.
Check2 Thedriveordrivecablemaybedefectiveordamaged.Replaceeachwithanew
onefollowingthestepsinChapter4,ReplacementProcedures.Ifthedriveisstill
notfunctioningproperly,performCheck3.
Check3 Thesystemboardmaybedamaged.Replaceitwithnewonefollowingthe
instructionsinChapter4,ReplacementProcedures.