Laptop User Manual
•Ifthecomputerdoesnotchargeduringoperation,goto“Checkingoperationalcharging”onpage33.
Tochecktheacadapter,dothefollowing:
1.Unplugtheacadaptercablefromthecomputer.
2.Measuretheoutputvoltageattheplugoftheacadaptercable.Seethefollowingillustration:
Pin
Voltage(Vdc)
1+20
20
3
Ground
1
2
3
(20V)
Note:Outputvoltageacrosspin2oftheacpoweradaptermightdifferfromtheoneyouareservicing.
3.Ifthevoltageisnotcorrect,replacetheacadapter.
4.Ifthevoltageisacceptable,replacethesystemboard.
Note:Noisefromtheacadapterdoesnotalwaysindicateadefect.
Checkingoperationalcharging
Tocheckwhetherthebatterychargescorrectlyduringoperation,dothefollowing:
Note:Beforeyoubegin,installadischargedbatterypackorabatterypackthathaslessthan50%ofthe
totalpowerremaininginthecomputer.
1.Ifthebatterystatusindicatordoesnotturnon,removethebatterypackandletitreturntoroom
temperature.
2.Reinstallthebatterypack.
3.Iftheindicatorstilldoesnotturnon,replacethebatterypack.
4.Iftheindicatorstilldoesnotturnon,replacethesystemboard.Otherwise,refertoCheckingthebattery
packtochecktheoriginalbatterypack.
Checkingthebatterypack
ThebatterystatusiconintheWindowsnoticationareadisplaysthepercentageofbatterypowerremaining.
Tocheckfordetailedbatterystatusinformation,dothefollowing:
•ForWindows7:OpenthePowerManagerprogramandclicktheBatterytab.
•ForWindows8:OpentheLenovoSupportprogramandclickBatteryHealth,oropentheLenovo
SettingsprogramandclickPower.
Note:Ifthebatterypackbecomeshot,itmaynotbeabletocharge.Removeitfromthecomputerandleave
itatroomtemperatureforawhile.Afteritcoolsdown,reinstallandrechargeit.
Tocheckthebatterypack,dothefollowing:
1.Turnoffthecomputeranddisconnecttheacpoweradapter.
2.Removethebatterypackandmeasurethevoltagebetweenbatteryterminals1(+)and7(-).The
correctvoltageareshowninthefollowingtable.
Chapter3.Generalcheckout33