Operation Manual

•CPU
•Heat-sink
•RearI/Omodule
•Memorymodule
Step20.ReattachtheEMIcover,middlecover,opticaldrive,standholder,footcoverandstandbase.
ReplacingtheLEDpanel
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
ToreplacetheLEDpanel:
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.Removethestandbase.Referto“Removingthestandbase” .
Step5.Removethefootcover.Referto“Removingthefootcover”.
Step6.Removethememorymodules.Referto“Replacingamemorymodule” .
Step7.Removetheopticaldrive.Referto“Replacingtheopticaldrive” .
Step8.Removethestandholder.Referto“Removingthestandholder”.
Step9.Removethemiddlecover.Referto“Removingthemiddlecover”.
Step10.RemovetheEMIcover.Referto“RemovingtheEMIcover” .
Step11.Removethespeakersystem.Referto“Replacingthespeakersystem” .
Step12.RemovetherearI/Omodule.Referto“ReplacingtherearI/Omodule”.
Step13.Removethesystemfan.Referto“Replacingthesystemfan” .
Step14.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step15.Disconnectthefollowingcablesfromconnectorsonthemotherboard:
•WLANantennacables
•Powerswitchboard
•Frontcontrolboardcable
•Cameracable
•LEDpaneldatacable
52LenovoC345/C445All-In-OnePCHardwareMaintenanceManual