Lenovo ThinkPad Edge E520 - Battery and power

4.Whilethecomputerisoff,removeallsourcesofpowerandexternalhardware.Refertotheprocedure
in“Replacingmemory”onpage93onhowtoremoveandreseatthememorymodules.Removeany
non-originalmemorymoduleaddedtoyourcomputer.Afterremovingtheextramemorymoduleand
reseatingtheoriginalmemorymodule,repeatstep2.Ifthecomputerstilldoesnotturnon,consultthe
user'sreferenceguideforothercustomer-replaceablecomponentsthatareattachedtoyourcomputer
Ifthecomputerstilldoesnotstartup,calltheCustomerSupportCenterandaCustomerSupportSpecialist
willassistyou.
Spillsonthekeyboard
Withamobilecomputer,thereareincreasedchancesofspillingliquidsonthekeyboard.Becausemost
liquidsconductelectricity,liquidspilledonthekeyboardcouldcreatenumerousshortcircuits,potentially
causingirreparabledamagetoyourcomputer.
Ifyouspillsomethingonyourcomputer:
Attention:Besurethatnoliquidcreatesashortcircuitbetweenyouandtheacpoweradapter(ifinuse).
Althoughyoumightlosesomedataorworkbyturningoffthecomputerimmediately,leavingthecomputer
onmightmakeyourcomputerunusable.
1.Carefullyunplugtheacpoweradapterimmediately.
2.Turnoffthecomputerimmediately.Ifthecomputerdoesnotturnoff,removethebattery.Themore
quicklyyoustopthecurrentfrompassingthroughthecomputerthemorelikelyyouwillreducedamage
fromshortcircuits.
3.Wipeyourcomputerdrywithapapertowel.
4.Beforeturningonyourcomputer,makesurethatalltheliquidhasdried.
Note:Ifyouwanttoreplaceyourkeyboard,contacttheCustomerSupportCenter.Referto“Calling
Lenovo”onpage161
.
Errormessages
•Message:0175:BadCRC1,stopPOSTtask.
Solution:TheEEPROMchecksumisnotcorrect(block#6).Havethecomputerserviced.
•Message:0177:BadSVPdata,stopPOSTtask.
Solution:ChecksumofthesupervisorpasswordintheEEPROMisnotcorrect.Thesystemboard
shouldbereplaced.Havethecomputerserviced.
•Message:0182:BadCRC2.EnterThinkPadSetupandloadSetupdefaults.
Solution:ChecksumoftheCRC2settingintheEEPROMisnotcorrect.PressF1togotoThinkPad
Setup.PressF9andthenpressEntertoloadthedefaultsetting.PressF10andthenpressEnter
torestartthesystem.
•Message:0185:Badstartupsequencesettings.EnterThinkPadSetupandloadSetupdefaults.
Solution:ChecksumofthestartupsequencesettingintheEEPROMisnotcorrect.PressF1togoto
ThinkPadSetup.PressF9andthenpressEntertoloadthedefaultsetting.PressF10andthenpress
Entertorestartthesystem.
•Message:0187:EAIAdataaccesserror.
Solution:TheaccesstoEEPROMisfailed.Havethecomputerserviced.
Chapter10.Troubleshootingcomputerproblems133