Lenovo System x3250 M4 - Page 106

Figure26.TheLEDsonthesystemboard
TheserverisdesignedsothatLEDsremainlitwhentheserverisconnectedtoanacpowersourcebutis
notturnedon,providedthatthepowersupplyisoperatingcorrectly.Thisfeaturehelpsyoutoisolatethe
problemwhentheoperatingsystemisshutdown.
Note:Whenyoudisconnectthepowersourcefromtheserver,youlosetheabilitytoviewtheLEDsbecause
theLEDsarenotlitwhenthepowersourceisremoved.Beforeyoudisconnectthepowersource,make
anoteofwhichLEDsarelit,includingtheLEDsthatarelitontheoperationinformationpanelandLEDs
insidetheserveronthesystemboard.
Manyerrorsarefirstindicatedbyalitsystem-errorLEDonthecontrol-panelassemblyoftheserver.Ifthis
LEDislit,oneormoreLEDselsewhereintheservermightalsobelitandcandirectyoutothesource
oftheerror.
BeforeyouworkinsidetheservertoviewtheLEDs,readthe“Safety”onpagev
and“Handling
static-sensitivedevices”onpage35.
Ifanerroroccurs,viewtheserverLEDsinthefollowingorder:
1.Checkthecontrol-panelassemblyonthefrontoftheserver.Ifthesystem-errorLEDislit,itindicates
thatanerrorhasoccurred.
2.CheckthefrontandrearoftheservertodeterminewhetheranycomponentLEDsarelit.
3.RemovetheservertopcoverandlookinsidetheserverforlitLEDs.Certaincomponentsinsidethe
serverhaveLEDsthatwillbelittoindicatethelocationofaproblem.Forexample,aDIMMerrorwill
lighttheLEDnexttothefailingDIMMonthesystemboard.
4.Lookatthesystemservicelabelinsidethetopcoveroftheserver,whichgivesanoverviewofinternal
components.Thisinformationcanoftenprovideenoughinformationtocorrecttheerror.
ThefollowingtabledescribestheLEDsonthesystemboardandsuggestedactionstocorrectthedetected
problems.
Table12.ThesuggestedactionstocorrectthedetectedproblemforeachLEDlight
•FollowthesuggestedactionsintheorderinwhichtheyarelistedintheActioncolumnuntiltheproblemis
solved.
•Ifanactionstepisprecededby“(Trainedtechnicianonly)”,thatstepmustbeperformedonlybyatrained
technician.
•GototheIBMsupportwebsiteathttp://www.lenovo.com/supporttocheckfortechnicalinformation,hints,
tips,andnewdevicedriversortosubmitarequestforinformation.
LEDDescriptionAction
DIMMerrorLEDs
AmemoryDIMMhasfailedorisincorrectly
installed.
1.RemovetheDIMMthathastheliterror
LED.
2.ReseattheDIMM.
3.Replacethefollowingcomponentsone
atatime,intheordershown,restarting
theservereachtime:
a.DIMM
b.(Trainedtechnicianonly)System
board
MicroprocessorerrorLED
Microprocessorhasfailed,ismissing,or
hasbeenincorrectlyinstalled.
Note:(Trainedtechnicianonly)Make
surethatthemicroprocessorisinstalled
1.Checkthesystem-eventlogto
determinethereasonforthelitLED.
2.(Trainedtechnicianonly)Reseatthe
failingmicroprocessor.
92LenovoSystemx3250M4InstallationandServiceGuide