2TroubleshootingProcedures
QOSMIOF50-QOSMIOF55-DYNABOOKQOSMIOF50SeriesMaintenanceManual 

3
Tables
Table2-1BatteryLED....................................................................................................10
Table2-2DC-INLED....................................................................................................11

2.1 TroubleshootingIntroduction

Chapter2describeshowtodetermineifaFieldReplaceableUnit(FRU)inthecomputeris
causingthecomputertomalfunction.TheFRUscoveredare:
TheDiagnosticsDiskoperationsaredescribedinChapter3.Detailedreplacement
proceduresaregiveninChapter4.
Thefollowingtoolsarenecessaryforimplementingthetroubleshootingprocedures:
1.DiagnosticsDisk(RepairandSoundRepair)
2.Phillipsscrewdriver(2mm)
3.6mmnutdriver(forthehelixscrewnutsontherearportsforCPUdoor)
4.2DDor2HDformattedworkdiskforfloppydiskdrivetesting
5.Sycard(EXPRESSCARDtestcard)
6.Cleaningkitforfloppydiskdrivetroubleshooting
7.Cleaningkitforopticaldrivetroubleshooting
8.Multimeter
9.Externalmonitor
10.USBcompatiblekeyboard
11.Multimediasoundsystemwithline-inandline-outports
12.Headphones
13.USBtestmoduleandUSBcable
14.MusicCD
15.MICmoduleandMICline