Lenovo Personal Computer 4155 Bedienungsanleitung Seite 124

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Note:UseonlythescrewsprovidedbyLenovo.
9.Installandtightenthefourscrewsattherearofthechassistosecurethepowersupply.
10.Installandtightenthetwoscrewsthatsecurethepowersupplytotheinsideofthechassis.
11.Reconnectallpowersupplycablestothedrives,adaptercards,andthesystemboard.Makesureto
reconnectthepowercabletothegraphicscardsthatrequireanadditionalcable.
12.Goto“CompletingtheFRUreplacement”onpage108.
Installingorreplacingamemorymodule
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkStationSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkStation
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support.
CAUTION:
Thememorymodulemightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeopeningthecomputercover.
Yourcomputerhas12slotsforinstallingorreplacingDDR3ECCUDIMMs(doubledatarate3errorcorrection
codeunbuffereddualin-linememorymodules)orDDR3ECCRDIMMs(doubledatarate3errorcorrection
coderegistereddualinlinememorymodules).
Wheninstallingorreplacingmemorymodules,usethefollowingguidelines:
UseeitherDDR3ECCUDIMMsorDDR3ECCRDIMMsforyourcomputer.Donotinstallboththe
UDIMMsandRDIMMsintothesamecomputer.
IfyourcomputerhasonlyoneCPUinstalled,besuretoinstallmemorymodulesonlyinthememory
slotsadjacenttothatCPU.
IfyourcomputerhastwoCPUsinstalled,installequalnumbersofmemorymodulesinbothsetsof
CPUDIMMslotsformaximumperformance.Andthetotalamountofmemoryshouldbeevenly
balancedbetweenthe2banks.Forexample:Ifyouaretoinstallsix1GBDIMMsinadual-processor
system,threeofthe1GBDIMMsshouldbeinstalledintheCPU1slots,andtheotherthreeshouldbe
installedintheCPU2slots.
Memorymustalwaysbeinstalledinthebluesocketsrst,startingwiththebluesocketclosesttoeach
respectiveCPU.Installintheblacksocketsonlyafterallbluesocketsareoccupied.
Toinstallorreplaceamemorymodule:
1.Removethecomputercover.See“Removingthecover”onpage78.
2.Laythecomputeronitsside.
3.Locatethememoryslots.See“Locatingpartsonthesystemboardonpage113.
Note:Ifitisthersttimethatthememorymodulebeingreplaced,youmighthavetoremovetheblue
shippingclipbeforeremovingthememoryfanduct.Ifthecomputeristoberepackagedandshipped,
theshippingclipmustbereinstalled.
4.Forsomecomputermodels,youmightneedtoremovethememoryfanducttoaccessthememory
slots.Toremovethememoryfanduct,removetheblueshippingclip,disconnectthememoryfancable
fromthesystemboard,pressinwardonthetwotabs,pivotthefanduct,andthendisengagethe
otherendoftheduct.
116ThinkStationHardwareMaintenanceManual
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