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Error!UsetheHometabtoapply2tothetextthatyouwanttoappearhere.Error!Usethe
Hometabtoapply2tothetextthatyouwanttoappearhere. 4ReplacementProcedures
SatelliteL550MaintenanceManual 4-5
BeforeYouBegin
Beforeyoubegintodisassemblethelaptop,keepinmindtheprecautionsandadviceinthis
section.AlwaysbegindisassemblybyremovingtheACadapterandbatterypack.Removethe
optionalpartsandaccessoriesaswell.Theproceduresforremovingthebatterieswillbe
explainedlater.
Disassemblethelaptoponlywhenanabnormalityhasoccurred.
Useonlytherecommendedtools.
Torunandstorethelaptop,besuretoprepareaworkingenvironmentthatisfreefrom:
Dustandcontaminants
Staticelectricity
Extremelyhighorlowtemperaturesandextremelyhighhumidity
RunthediagnostictestsexplainedinChapter2ofthismanualtoidentifytheFRUthathas
probablycausedthesystemfailure.
Performonlytherequiredmachineoperations.Useonlythedisassemblyandreinstallation
proceduresdescribedinthismanual.
Placetheremovedcomponentsinasafeplaceawayfromthelaptopsothattheyarenotdamaged
orgetinthewayofyoudoingyourwork.
Normally,anumberofscrewsneedtoberemovedorreplacedduringdisassembling.Placethe
removedscrewsinasafeplacesothatyoucaneasilyfindtherightscrewsfortheright
components.
Whenassemblingthelaptop,usethespecifiedscrewstofastenthepartstothespecifiedlocations.
Seetheappropriateexplanationsandfiguresforscrewsizes.
Toavoidpersonalinjury,usecaretohandlecomponentsthathavesharpedgesorcorners.
AfteryouhavereplacedaFRU,checkthattheFRUworkscorrectlytoensurenormallaptop
operation.