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2TroubleshootingProcedures
QOSMIOF50-QOSMIOF55-DYNABOOKQOSMIOF50SeriesMaintenanceManual

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asinstructed.TheflowchartinFigure2-2givesasummaryoftheprocess.Theprocedures
describedinthissectionare:
Procedure1: Powerstatuscheck
Procedure2: Adaptor/batteryreplacement
Procedure3: Powersupplyconnectioncheck
Procedure4: Diagnosticcheck
Procedure5: Internalconnectioncheck
Procedure1 PowerStatusCheck
ThefollowingLEDSindicatethepowersupplystatus:
BatteryLED
DC-INLED
ThepowersupplycontrollerdisplaysthepowersupplystatusthroughtheBatteryandtheDC-
INLEDSaslistedinthetablesbelow.
Table2-1BatteryLED
BatteryState LEDcolors Definition
Charging Amber,solidon BatterychargingwithAC.
Blue,solidon BatteryfullychargedbyAC
Bluecoloroff BatteryabnormalstopchargingwithAC
(Badcell/Overheated)
Discharging Amber,blinking
(LED on for1 second
every4seconds)
Batterywithinlowstate:12minutes
remaining
Amber,blinking
(LED on for1 second
every2seconds)
Batterywithincriticallowstate:3
minutesremaining.Thesystemis
protectedandcannotbere-poweredon
withouttheACpowerconnected.
Ambercoloroff Batterynotinloworcriticallowstate;
It’sindischargingstate