Owner's manual

Table Of Contents
IfyouareinstructedtoreplaceaFRUbutthereplacementdoesnotsolvetheproblem,reinstallthe
originalFRUbeforeyoucontinue.
Somecomputershavebothaprocessorboardandasystemboard.Ifyouareinstructedtoreplaceeither
theprocessorboardorthesystemboard,butthereplacementdoesnotsolvetheproblem,reinstallthe
originalboard,andthenreplacetheotherone.
IfanadapteroradeviceconsistsofmorethanoneFRU,anyoftheFRUsmightbethecauseoftheerror.
Beforereplacingtheadapterordevice,removetheFRUsonebyonetoseeifthesymptomschange.Find
andreplaceonlytheFRUthatchangedthesymptoms.
Screwnotices
TheLenovonotebookcomputerusesspecialnylon-coatedscrewsthathavethefollowingcharacteristics:
Theymaintaintightconnections.
Theydonoteasilycomeloose,evenwithshockorvibration.
Theyarehardertotighten.
Dothefollowingwhenyouareservicingthecomputer:
Keepthescrewkitinyourtoolbag.
Itisrecommendedthatyouusenewscrews.
Itisrecommendedthatyouuseeachscrewonlyonce.
Useatorquescrewdriverifyouhaveone.
Tightenscrewsasfollows:
Plastictoplastic
Turnanadditionalangleof90degreesafterthescrewheadtouchesthesurfaceoftheplasticpart.
Logiccardtoplastic
Turnanadditionalangleof180degreesafterthescrewheadtouchesthesurfaceofthelogiccard.
Notes:
Ensurethatyouusethecorrectscrew.Itisrecommendedthatyouusenewscrewsforreplacements.If
youhaveatorquescrewdriver,firmlytightenallscrewstothetorquespecifiedinthescrewinformation
tableforeachstep.
Ensurethattorquescrewdriversarecalibratedcorrectlyfollowingcountryspecifications.
46HardwareMaintenanceManual