System information

3.Iftheindicatorstilldoesnotturnon,replacethebatterypack.

4.Iftheindicatorstilldoesnotturnon,replacethesystemboard.Otherwise,referto“Checkingthe

backupbattery”onpage36.

Checkingthebatterypack

BatterychargingdoesnotstartuntilthePowerManagerBatteryGaugeshowsthatlessthan96%ofthe

totalpowerremains;underthisconditionthebatterypackcanchargeto100%ofitscapacity.Thisprotects

thebatterypackfrombeingoverchargedorfromhavingashortenedlife.

Tocheckyourbattery,moveyourcursortothePowerManagerBatteryGaugeiconintheicontrayofthe

Windowstaskbarandwaitforamoment(butdonotclick),andthepercentageofbatterypowerremaining

isdisplayed.Togetdetailedinformationaboutthebattery,double-clickthePowerManagerBattery

Gaugeicon.

Note:Ifthebatterypackbecomeshot,itmaynotbeabletocharge.Removeitfromthecomputerandleave

itatroomtemperatureforawhile.Afteritcoolsdown,reinstallandrechargeit.

Tocheckthebatterypack,dothefollowing:

1.Turnoffthecomputeranddisconnecttheacpoweradapter.

2.Removethebatterypackandmeasurethevoltagebetweenbatteryterminals1(+)and7(-).The

followingcorrectvoltagesareshowninthefollowingtable:

Terminal

Voltage(Vdc)

1+0to+12.6

Ground(-)

1(+)

2(+)

6(-)

7(-)

3.Ifthevoltageislessthan+11.0Vdc,thebatterypackhasbeendischarged.

Note:Rechargingwilltakeatleast3hours,eveniftheindicatordoesnotturnon.

Ifthevoltageisstilllessthan+11.0Vdcafterrecharging,replacethebattery.

4.Ifthevoltageismorethan+11.0Vdc,measuretheresistancebetweenbatteryterminals5and7.

Theresistancemustbe4to30KΩ.Iftheresistanceisnotcorrect,replacethebatterypack.Ifthe

resistanceiscorrect,replacethesystemboard.

Checkingthebackupbattery

Dothefollowing:

1.Poweroffthecomputer,andunplugtheacadapterfromit.

2.Turnthecomputerupsidedown.

3.Removethebatterypack(see“1010Batterypack”onpage58).

4.Removethebackupbattery(see“1110Backupbattery”onpage74).

5.Measurethevoltageofthebackupbattery.Seethefollowinggure.

36HardwareMaintenanceManual