Step9.Disconnectthetouchcablesfromthetouchcontrolboard.1
Step10.Removethetwoscrewsthatsecurethetouchcontrolboardtothechassis.2
Step11.Liftupthetouchcontrolboardtoremoveit.
Step12.Toinstallthenewtouchcontrolboard:
a.Lineuptheholesonthenewtouchcontrolboardwiththemountingholesonthemiddleframe
andsecureitwiththetwoscrews.
b.Connectallthecablestothenewtouchcontrolboard.
Step13.ReattachtheEMIcover,middlecover,opticaldrive,computerstandandtherearcover.
Replacingthescalarboard
Note:Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Toreplacethescalarboard
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”.
Step8.RemovetheEMIcover.Referto“RemovingtheEMIcover” .
Step9.RemovetherearI/Omodule.Referto“ReplacingtherearI/Omodule” .
54IdeaCentreB345–B545All-In-OneHardwareMaintenanceManual
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