Lenovo IdeaCentre B345 All-in-One Bedienungsanleitung Seite 52

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Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
Toreplacetheheat-sink:
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.Removethesystemfans.Referto“Replacingthesystemfans” .
Step10.Removetheeightscrewsthatsecuretheheat-sinktothemotherboard,anddetachthecables
attachedtotheheat-sink,thenliftuptheheat-sinktoremoveit.
Step11.Toinstallthenewheat-sink:
a.Lineupthenewheat-sinkwithmountingholesonmotherboardandsecureitwiththeeight
screws.
b.Followthenumbersprintedonthenewheat-sinktosecureitorderlyusingthefourscrews.
Step12.Reattachthesystemfan,EMIcover,middlecover,opticaldrive,computerstandandtherearcover.
46IdeaCentreB345–B545All-In-OneHardwareMaintenanceManual
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