ThinkPad T420s - Chapter 3. General Checkout

Chapter3.Generalcheckout
Thischapterpresentsthefollowinginformation:
•“Whattodofirst”onpage35
•“Checkoutguide”onpage36
–“SystemsupportingtheLenovoThinkVantageToolboxprogramandthePC-DoctorforDOS
diagnosticsprogram”onpage36
–“SystemsupportingtheLenovodiagnosticsprograms”onpage40
•“Powersystemcheckout”onpage42
ThedescriptionsinthischapterapplytoanyThinkPadmodelthatsupportsthePC-Doctor
®
forDOS
diagnosticsprogram.Somedescriptionsmightnotapplytoyourparticularcomputer.
Beforeyougotothecheckoutguide,besuretoreadthefollowingimportantnotes.
Importantnotes:
•Onlycertifiedtrainedpersonnelshouldservicethecomputer.
•BeforereplacinganyFRU,readtheentirepageonremovingandreplacingFRUs.
•WhenyoureplaceFRUs,itisrecommendedtousenewnylon-coatedscrews.
•Beextremelycarefulduringsuchwriteoperationsascopying,saving,orformatting.Drivesinthe
computerthatyouareservicingsequencemighthavebeenaltered.Ifyouselectanincorrectdrive,
dataorprogramsmightbeoverwritten.
•ReplaceaFRUonlywithanotherFRUofthecorrectmodel.WhenyoureplaceaFRU,makesurethat
themodelofthemachineandtheFRUpartnumberarecorrectbyreferringtotheFRUpartslist.
•AFRUshouldnotbereplacedbecauseofasingle,unreproduciblefailure.Singlefailurescanoccur
foravarietyofreasonsthathavenothingtodowithahardwaredefect,suchascosmicradiation,
electrostaticdischarge,orsoftwareerrors.ConsiderreplacingaFRUonlywhenaproblemrecurs.Ifyou
suspectthataFRUisdefective,cleartheerrorlogandrunthetestagain.Iftheerrordoesnotrecur,do
notreplacetheFRU.
•BecarefulnottoreplaceanondefectiveFRU.
Whattodofirst
WhenyoudoreturnaFRU,youmustincludethefollowinginformationinthepartsexchangeformor
partsreturnformthatyouattachtoit:
1.Nameandphonenumberofservicetechnician
2.Dateofservice
3.Dateonwhichthemachinefailed
4.Dateofpurchase
5.Failuresymptoms,errorcodesappearingonthedisplay,andbeepsymptoms
6.ProcedureindexandpagenumberinwhichthefailingFRUwasdetected
7.FailingFRUnameandpartnumber
8.Machinetype,modelnumber,andserialnumber
9.Customer'snameandaddress
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