Contents
Aboutthismanual...........iii
Chapter1.Safetyinformation......1
Generalsafety................1
Electricalsafety...............2
Safetyinspectionguide............3
Handlingdevicesthataresensitivetoelectrostatic
discharge..................3
Groundingrequirements............4
Safetynotices(multilingualtranslations)......4
Lasercompliancestatements(multilingual
translations)................17
Chapter2.Importantservice
information..............25
StrategyforreplacingFRUs.........25
Strategyforreplacingaharddiskdrive...25
Importantnoticeforreplacingasystem
board................26
Howtouseerrorcodes.........26
StrategyforreplacingFRUsforCTO,CMV,and
GAV...................26
Productdenition............26
FRUidenticationforCTO,CMV,andGAV
products...............27
Chapter3.Generalcheckout.....29
Whattodorst..............29
Checkoutguide..............31
SystemsupportingtheLenovoThinkVantage
ToolboxprogramandthePC-DoctorforDOS
diagnosticsprogram..........31
SystemsupportingtheLenovodiagnostics
programs...............35
Powersystemcheckout...........37
Checkingtheacpoweradapter......37
Checkingoperationalcharging......38
Checkingthebatterypack........38
Checkingthebackupbattery.......39
Chapter4.Relatedservice
information..............41
RestoringthefactorycontentsbyusingRecovery
DiscSet.................41
Passwords................42
Power-onpassword...........42
Hard-diskpassword...........42
Supervisorpassword..........43
Howtoremovethepower-onpassword...43
Howtoremovethehard-diskpassword...43
Powermanagement............44
Screenblankmode...........44
Sleep(standby)mode..........44
Hibernationmode...........45
Symptom-to-FRUindex...........45
Numericerrorcodes..........46
Errormessages............47
Beepsymptoms............48
No-beepsymptoms...........49
LCD-relatedsymptoms.........49
Intermittentproblems..........49
Undeterminedproblems.........50
Chapter5.Installingandconguring
RAID..................51
SupportedRAIDlevels...........51
ConguringthesystemUEFIBIOStoenable
embeddedSATARAIDfunctionality......51
CreatingRAIDvolumes...........52
DeletingRAIDvolumes...........52
Chapter6.Statusindicators.....53
Chapter7.Fnkeycombinations...57
Chapter8.FRUreplacement
notices................61
Screwnotices...............61
Retainingserialnumbers...........62
Restoringtheserialnumberofthesystem
unit.................62
RetainingtheUUID...........63
ReadingorwritingtheECAinformation...63
Chapter9.Removingandreplacinga
FRU..................65
BeforeservicingThinkPadT520,T520i,and
W520..................66
1010Batterypack.............66
1020SerialUltrabayEnhanceddeviceortravel
bezel..................67
1030DIMMslotcover............68
1040DIMM(bottomslot)...........69
1050Harddiskdriveslotcover,harddiskdrive
(HDD)andHDDrubberrailsorsolidstatedrive
(SSD)andstorageconverter.........71
1060Keyboard..............72
1070DIMM(upperslot)...........76
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