Lenovo ThinkCentre M90p - Page 78

Yourcomputerhasaspecialtypeofmemorythatmaintainsthedate,time,andsettingsforbuilt-infeatures,
suchasparallel-portassignments(conguration).Abatterykeepsthisinformationactivewhenyouturn
offthecomputer.
Thebatterynormallyrequiresnochargingormaintenancethroughoutitslife;however,nobatterylasts
forever.Ifthebatteryfails,thedate,time,andcongurationinformation(includingpasswords)arelost.An
errormessageisdisplayedwhenyouturnonthecomputer.
Refertothe“Lithiumbatterynotice”intheThinkCentreSafetyandWarrantyGuideforinformationabout
replacinganddisposingofthebattery.
Toreplacethebattery,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Openthecomputercover.See“Openingthecomputercover”onpage68.
3.Locatethebattery.See“Locatingpartsonthesystemboard”onpage70.
4.Removetheoldbattery.
Figure6.Removingtheoldbattery
5.Installanewbattery.
Figure7.Installinganewbattery
6.Closethecomputercoverandconnectthecables.See“Completingthepartsreplacement”onpage93.
Note:Whenthecomputeristurnedonforthersttimeafterreplacingthebattery,anerrormessage
mightbedisplayed.Thisisnormalafterreplacingthebattery.
7.Turnonthecomputerandallattacheddevices.
8.UsetheSetupUtilityprogramtosetthedate,time,andanypasswords.SeeChapter6“UsingtheSetup
Utilityprogram”onpage39.
9.Goto“Completingthepartsreplacement”onpage93.
72ThinkCentreHardwareMaintenanceManual