User Guide

Chapter3.Generalcheckout

Thischapterpresentsfollowinginformation:

•“Whattodorst”onpage34

•“Checkoutguide”onpage35

–“DiagnosticsusingPC-DoctorforDOS”onpage35

–“LenovoThinkVantageToolbox”onpage37

–“FRUtests”onpage38

•“Powersystemcheckout”onpage39

ThedescriptionsinthischapterapplytoanyThinkPadmodelthatsupportsthePC-Doctor

forDOS

diagnosticsprogram.Somedescriptionsmightnotapplytoyourparticularcomputer.

Beforeyougotothecheckoutguide,besuretoreadthefollowingimportantnotes.

Important:

•Onlycertiedtrainedpersonnelshouldservicethecomputer.

•BeforereplacinganyFRU,readtheentirepageonremovingandreplacingFRUs.

•WhenyoureplaceFRUs,usenewnylon-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.