User Guide

Powersystemcheckout
Toverifyasymptom,dothefollowing:
1.Turnoffthecomputer.
2.Removethebatterypack.
3.ConnecttheACadapter.
4.Checkthatpowerissuppliedwhenyouturnonthecomputer.
5.Turnoffthecomputer.
6.DisconnecttheACadapterandinstallthechargedbatterypack.
7.Checkthatthebatterypacksuppliespowerwhenyouturnonthecomputer.
Ifyoususpectapowerproblem,seetheappropriateoneofthefollowingpowersupplycheckouts:
•“CheckingtheACadapter”onpage39
•“Checkingoperationalcharging”onpage39
•“Checkingthebatterypack”onpage40
•“Checkingthebackupbattery”onpage40
CheckingtheACadapter
YouareherebecausethecomputerfailsonlywhentheACadapterisused.
•Ifthepowerproblemoccursonlywhenthedockingstationortheportreplicatorisused,replacethe
dockingstationortheportreplicator.
•Ifthepower-onindicatordoesnotturnon,checkthepowercordoftheACadapterforcorrectcontinuity
andinstallation.
•Ifthecomputerdoesnotchargeduringoperation,goto“Checkingoperationalcharging”onpage39
.
TochecktheACadapter,dothefollowing:
1.UnplugtheACadaptercablefromthecomputer.
2.MeasuretheoutputvoltageattheplugoftheACadaptercable.Seethefollowinggure:
Pin
Voltage(Vdc)
1+20
20
3
Ground
1
2
3
(20V)
Note:Outputvoltageofpinno.2oftheACadaptermaydifferentfromtheoneyouareservicing.
3.Ifthevoltageisnotcorrect,replacetheACadapter.
4.Ifthevoltageisacceptable,dothefollowing:
•Replacethesystemboard.
•Iftheproblempersists,goto“FRUtests”onpage38.
Note:NoisefromtheACadapterdoesnotalwaysindicateadefect.
Checkingoperationalcharging
Tocheckwhetherthebatterychargesproperlyduringoperation,useadischargedbatterypackorabattery
packthathaslessthan50%ofthetotalpowerremainingwheninstalledinthecomputer.
Chapter3.Generalcheckout39