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2TroubleshootingProcedures
QOSMIOF50-QOSMIOF55-DYNABOOKQOSMIOF50SeriesMaintenanceManual

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Procedure4 Diagnosticcheck
Thepowersupplymaynotchargethebatterypack.Performthefollowingprocedures:
1. Reinstallthebatterypack.
2. AttachtheACadaptorandturnonthepower.Ifyoucannotturnonthepower,goto
Procedure5.
3. RuntheDiagnostictestfollowingtheproceduresdescribedinChapter3,Testsand
Diagnostics.Ifnoproblemisdetected,thebatteryisfunctioningnormally.
Procedure5 Replacementcheck
Thesystemboardmaybedisconnectedordamaged.Disassemblethecomputerfollowingthe
stepsdescribedinChapter4,ReplacementProcedures.ChecktheconnectionbetweentheAC
adaptorandthesystemboard.Aftercheckingtheconnection,performCheck1:
Check1 Useamulti-metertomakesurethatthefusesonthesystemboardarenotblown.
Ifafuseisnotblown,gotoCheck2.Ifafuseisblown,gotoCheck3.
Check2 Makesurethatthebatterycableisfirmlyconnectedtothesystemboard.Ifitis
connectedfirmly,gotoCheck3.
Check3 Thesystemboardmaybedamaged.Replaceitwithanewonefollowingthe
instructionsinChapter4.