Lenovo B590 Notebook User Manual Page 47

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Chapter6.FRUreplacementnotices
Thischapterpresentsnoticesrelatedtoremovingandreplacingparts.Readthischaptercarefullybefore
replacinganyFRU.
CRUstatementforcustomers:
Youcanresolvesomeproblemswithyourproductwithareplacementpartyoucaninstallyourself,called
a“CustomerReplaceableUnit”or“CRU”.SomeCRUsaredesignatedasself-serviceCRUsandothers
aredesignatedasoptional-serviceCRUs.Installationofself-serviceCRUsisyourresponsibility.For
optional-serviceCRUs,youcaneitherinstalltheCRUyourselforyoucanrequestthataServiceProvider
installtheCRUaccordingtothewarrantyserviceforyourproduct.IfyouintendoninstallingtheCRU,
LenovowillshiptheCRUtoyou.CRUinformationandreplacementinstructionsareshippedwithyour
productandareavailablefromLenovoatanytimeuponrequest.YoucanndalistofCRUsforyour
productinthisHardwareMaintenanceManual.Anelectronicversionofthismanualcanbefoundat
http://www.lenovo.com/UserManuals.Followtheon-screeninstructionstondthemanualforyourproduct.
YoumightberequiredtoreturnthedefectiveCRU.Whenreturnisrequired:(1)returninstructions,aprepaid
shippinglabel,andacontainerwillbeincludedwiththereplacementCRU;and(2)youmightbechargedfor
thereplacementCRUifLenovodoesnotreceivethedefectiveCRUwithinthirty(30)daysofyourreceiptof
thereplacementCRU.SeeyourLenovoLimitedWarrantydocumentationforfulldetails.
Screwnotices
Loosescrewscancauseareliabilityproblem.IntheLenovonotebookcomputer,thisproblemisaddressed
withspecialnylon-coatedscrewsthathavethefollowingcharacteristics:
Theymaintaintightconnections.
Theydonoteasilycomeloose,evenwithshockorvibration.
Theyarehardertotighten.
Dothefollowingwhenyouservicethismachine:
Keepthescrewkitinyourtoolbag.
Itisrecommendedtousenewscrews.
Itrecommendedtouseeachscrewonlyonce.
Useatorquescrewdriverifyouhaveone.
Tightenscrewsasfollows:
Plastictoplastic
Turnanadditional90degreesafterthescrewheadtouchesthesurfaceoftheplasticpart:
Logiccardtoplastic
Turnanadditional180degreesafterthescrewheadtouchesthesurfaceofthelogiccard:
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