Contents
Aboutthismanual............v
Chapter1.Safetyinformation.....1
Generalsafety................1
Electricalsafety...............2
Safetyinspectionguide............3
Handlingdevicesthataresensitivetoelectrostatic
discharge..................3
Groundingrequirements............4
Safetynotices(multilingualtranslations)......4
Lasercompliancestatement(multilingual
translations)................17
Chapter2.Importantservice
information..............23
StrategyforreplacingFRUs.........23
Strategyforreplacingaharddiskdrive...24
Importantnoticeforreplacingasystem
board................24
Howtouseerrormessage........24
StrategyforreplacingFRUsforCTO,CMV,and
GAV...................24
Productdenition............24
FRUidenticationforCTO,CMV,andGAV
products...............25
Chapter3.Generalcheckout.....27
Whattodorst..............27
Checkoutguide..............28
DiagnosticsusingPC-DoctorforDOS....28
LenovoThinkVantageToolbox.......30
FRUtests...............31
Powersystemcheckout...........32
Checkingtheacadapter.........33
Checkingoperationalcharging......33
Checkingthebatterypack........33
Checkingthebackupbattery.......34
Chapter4.Relatedservice
information..............35
RestoringthefactorycontentsbyusingRecovery
DiscSet.................35
Passwords................36
Power-onpassword...........36
Hard-diskpassword...........36
Supervisorpassword..........37
Howtoremovethepower-onpassword...37
Howtoremovethehard-diskpassword...37
Powermanagement............38
Screenblankmode...........38
Sleep(standby)mode..........38
Hibernationmode...........39
Symptom-to-FRUindex...........39
Numericerrorcodes..........40
Errormessages............41
Beepsymptoms............42
No-beepsymptoms...........43
LCD-relatedsymptoms.........43
Intermittentproblems..........43
Undeterminedproblems.........44
Chapter5.Installingandconguring
RAID..................45
SupportedRAIDcongurations........45
ConguringthesystemUEFIBIOStoenable
embeddedSATARAIDfunctionality......45
CreatingRAIDvolumes...........45
DeletingRAIDvolumes...........46
Chapter6.Statusindicators.....47
Chapter7.Fnkeycombinations...51
Chapter8.FRUreplacement
notices................55
Screwnotices...............55
Retainingserialnumbers...........56
Restoringtheserialnumberofthesystem
unit.................56
RetainingtheUUID...........56
ReadingorwritingtheECAinformation...57
Chapter9.Removingandreplacinga
FRU..................59
BeforeservicingThinkPadT520,T520i,and
W520..................60
1010Batterypack.............60
1020SerialUltrabayEnhanceddeviceortravel
bezel..................61
1030DIMMslotcover............62
1040DIMM(bottomslot)...........63
1050Harddiskdriveslotcover,harddiskdrive
(HDD)andHDDrubberrailsorsolidstatedrive
(SSD)andstorageconverter.........65
1060Keyboard..............67
1070DIMM(upperslot)...........70
1080PCIExpressMiniCardforwirelessLAN..71
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