Produkte der Marke Lenovo

Step17.Removethevescrewsthatsecurethemotherboardtothechassisandliftthemotherboard

uptoremoveit.

Step18.Toinstallthenewmotherboard:

a.Lineuptheholesonthenewmotherboardwiththemountingholeschassisandplacethenew

motherboardintoposition.

b.Usethescrewstosecurethenewmotherboardtothechassis.

Step19.Installthefollowingpartstothenewmotherboard:

•WLANcard

•TV-Tunercard

•CPU

•Heat-sink

•RearI/Omodule

•Memorymodule

Step20.Connectallthecablestothenewmotherboard.

Step21.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.

54LenovoC540HardwareMaintenanceManual