Lenovo ThinkCentre M90 User's Guide Page 20

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Openingthecomputercover
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoopenthecomputercover.
CAUTION:
Turnoffthecomputerandwaitthreetoveminutestoletthecomputercoolbefore
openingthecomputercover.
Toopenthecomputercover,dothefollowing:
1.Removeanymediafromthedrivesandturnoffallattacheddevicesandthecomputer.
2.Disconnectallpowercordsfromelectricaloutlets.
3.Disconnectthepowercords,Input/Outputcables,andanyothercablesthatareconnectedtothe
computer.See“Locatingconnectorsonthefrontofyourcomputer”onpage6and“Locatingconnectors
ontherearofyourcomputeronpage7
.
4.Removeanylockingdevicethatsecuresthecomputercover,suchasanintegratedcablelock.See
“Integratedcablelock”onpage33.
5.Pressthecover-releasebuttonsonthesidesofthecomputerandpivotthecomputercoverupward.
Figure6.Openingthecomputercover
Accessingthesystemboardcomponentsanddrives
Thissectionprovidesinstructionsonhowtoaccessthesystemboardcomponentsanddrives.
Toaccessthesystemboardcomponentsanddrives,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Openthecomputercover.See“Openingthecomputercoveronpage12.
3.Pivottheopticaldrivebayassemblyupwardtoaccesstheinternalcomponents.Onsomemodels,you
mightneedtoremovetheharddiskdrivetoaccesssomeinternalcomponents.See“Replacingthe
harddiskdrive”onpage18.
12ThinkCentreUserGuide
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