Personal Computer User Manual

Important:Toavoiddamagingthemicroprocessorcontacts,keepthemicroprocessorcompletelylevel
whileinstallingitintothesocket.
Step15.Lowerthemicroprocessorstraightdownintoitssocketonthemotherboard.
Step16.Tosecurethemicroprocessorinthesocket,closethemicroprocessorretainerandlockitinto
positionwiththesmallhandle.
Step17.Useathermalgreasesyringetoplace5dropsofgreaseonthetopofthemicroprocessor.Each
dropofgreaseshouldbe0.03ml(3tickmarksonthegreasesyringe).
Step18.Reattachtheheat-sink,systemfan,EMIcover,middlecover,opticaldrive,computerstandand
therearcover.
ReplacingtherearI/Omodule
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
ToreplacetherearI/Omodule:
Step1.Removeanymedia(disks,CDs,DVDsormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
Step3.Disconnectallcablesattachedtothecomputer.Thisincludespowercords,input/output(I/O)
cables,andanyothercablesthatareconnectedtothecomputer.Referto“Leftandrightview”
and“Rearview”forhelpwithlocatingthevariousconnectors.
Step4.Removetherearcover.Referto“Removingtherearcover”.
Step5.Removethecomputerstand.Referto“Removingthecomputerstand” .
Step6.Removetheopticaldrive.Referto“Replacingtheopticaldrive”.
Step7.Removethemiddlecover.Referto“Removingthemiddlecover”.
Step8.RemovetheEMIcover.Referto“RemovingtheEMIcover”.
Step9.Removethe3screwsthatsecuretherearI/Omoduleandmetalbrackettothechassis.
48IdeaCentreB540–B540PHardwareMaintenanceManual