Specifications

Step11.RemovethescrewthatsecurestheWLANcardtothemotherboard.1
Step12.LiftuptheWLANcardtoremoveitfromthesocket.2
Step13.ToinstallthenewWLANcard:
a.InsertthenotchedendoftheWLANcardintothecardportonthemotherboard.
b.SecurenewtheWLANcardtothemotherboardwiththescrew.
c.ConnecttheantennacablestothenewWLANcard.
Step14.ReattachtheEMIcover,middlecover,opticaldrive,standholder,footcoverandstandbase.
Replacingthefrontcontrolboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:Itmaybehelpfultoplacethecomputerface-downonasoftatsurfaceforthisprocedure.Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
orotherdamage.
Toreplacethefrontcontrolboard:
Step1.Removeanymedia(disks,CDs,DVDs,ormemorycards)fromthedrives,shutdowntheoperating
system,andturnoffthecomputerandallattacheddevices.
Step2.Unplugallpowercordsfromelectricaloutlets.
50LenovoC355/C455All-In-OneComputerHardwareMaintenanceManual