Step8.Liftupthemiddlecoverupwardtoremoveit.
Step9.Toreattachthemiddlecover:
a.Lineupthemiddlecoverwithchassis,thenplaceitbackinposition.
b.Securethemiddlecovertothechassiswitheightscrews.
Step10.Reattachtheopticaldrive,computerstandandtherearcover.
Replacingtheconverterboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
Toreplacetheconverterboard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)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”.
36IdeaCentreB550–B555HardwareMaintenanceManual
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