ThinkPad Edge E540 - Checking Operational Charging; Checking the Battery Pack

•Ifthesystem-statusindicatordoesnotblinkthreetimeswhenanacpowersourceisconnected,check
thepowercordoftheacpoweradapterforcorrectcontinuityandinstallation.
•Ifthecomputerdoesnotchargeduringoperation,goto“Checkingoperationalcharging”onpage31.
Tochecktheacpoweradapter,dothefollowing:
1.Unplugtheacpoweradaptercablefromthecomputer.
2.Measuretheoutputvoltageattheplugoftheacpoweradaptercable.
Pin
Voltage(Vdc)
1+20
20
3
Ground
(20V)
1
3
2
Note:Outputvoltageacrosspin2oftheacpoweradaptermightdifferfromtheoneyouareservicing.
3.Ifthevoltageisnotcorrect,replacetheacpoweradapter.
4.Ifthevoltageisacceptable,replacethesystemboard.
Note:Noisefromtheacpoweradapterdoesnotalwaysindicateadefect.
Checkingoperationalcharging
Tocheckwhetherthebatterypackchargescorrectlyduringoperation,dothefollowing:
1.Dischargethebatterypackuntiltheremainingbatterypowerislessthan50%.
2.Connectthecomputertoacpowertochargethebatterypack.IfthebatterystatusiconintheWindows
noticationareaindicatesthatthebatteriesarenotcharging,removethebatterypackandletthem
returntoroomtemperature.
3.Reinstallthebatterypack.Ifthebatteriesarestillnotcharging,replacethebatterypack.
4.Checkthebatterystatusiconagain.Ifthesameerrorstillexists,replacethesystemboard.Otherwise,
checktheoriginalbatterypack.See“Checkingthebatterypack”onpage31.
Checkingthebatterypack
ThissystemsupportsonlybatteriesspeciallydesignedforthisspecicsystemandmanufacturedbyLenovo
oranauthorizedbuilder.Thesystemdoesnotsupportunauthorizedbatteriesorbatteriesdesignedforother
systems.Ifanunauthorizedbatteryorabatterydesignedforanothersystemsisinstalled,thesystemwill
notcharge.
Attention:Lenovohasnoresponsibilityfortheperformanceorsafetyofunauthorizedbatteries,and
providesnowarrantiesforfailuresordamagearisingoutoftheiruse.
ThebatterystatusiconintheWindowsnoticationareadisplaysthepercentageofbatterypowerremaining.
Tocheckfordetailedbatterystatusinformation,dothefollowing:
•ForWindows7:OpenthePowerManagerprogramandclicktheBatterytab.
•ForWindows8:OpentheLenovoSupportprogramandclickBatteryHealth,oropentheLenovo
SettingsprogramandclickPower.
Note:Ifthebatterypackbecomeshot,itmaynotbeabletocharge.Removeitfromthecomputerandleave
itatroomtemperatureforawhile.Afteritcoolsdown,reinstallandrechargeit.
Chapter3.Generalcheckout31