Replacingthemotherboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftflatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
Toreplacethemotherboard:
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.Removetheheat-sink.Referto“Replacingtheheat-sink” .
Step12.RemovetheCPU.Referto“ReplacingtheCPU”.
Step13.RemovetheTV-Tunercard.Referto“ReplacingtheTVtunercard”.
Step14.RemovetheWLANcard.Referto“ReplacingtheWLANcard”.
Step15.RemovetheTV-Tunerantennajackasshown.
Step16.Unplugthefollowingcablesfromconnectorsonthemotherboard:
•Convertercable
•Systemfanpowercable
42LenovoB50–35All-In-OneComputerHardwareMaintenanceManual
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