Lenovo System x3550 M4 - Video Problems; Solving Power Problems

•FollowthesuggestedactionsintheorderinwhichtheyarelistedintheActioncolumnuntiltheproblemis
solved.
•Ifanactionstepisprecededby“(Trainedtechnicianonly),”thatstepmustbeperformedonlybyatrained
technician.
•Gotothesupportwebsiteathttp://www.lenovo.com/supporttocheckfortechnicalinformation,hints,tips,
andnewdevicedriversortosubmitarequestforinformation.
SymptomAction
AUSBdevicedoesnotwork.
1.Makesurethat:
•ThecorrectUSBdevicedriverisinstalled.
•TheoperatingsystemsupportsUSBdevices.
2.MakesurethattheUSBconfigurationoptionsaresetcorrectlyintheSetup
utility(see“UsingtheSetuputility”onpage97
formoreinformation).
3.IfyouareusingaUSBhub,disconnecttheUSBdevicefromthehuband
connectitdirectlytotheserver.
Videoproblems
Usethisinformationtosolvevideoproblems.
See“Monitorandvideoproblems”onpage145.
Solvingpowerproblems
Usethisinformationtosolvepowerproblems.
Powerproblemscanbedifficulttosolve.Forexample,ashortcircuitcanexistanywhereonanyofthe
powerdistributionbuses.Usually,ashortcircuitwillcausethepowersubsystemtoshutdownbecauseof
anovercurrentcondition.Todiagnoseapowerproblem,usethefollowinggeneralprocedure:
Step1.Turnofftheserveranddisconnectallpowercords.
Step2.Checkforloosecablesinthepowersubsystem.Alsocheckforshortcircuits,forexample,ifa
loosescrewiscausingashortcircuitonacircuitboard.
Step3.CheckthelitLEDsonthelightpathdiagnosticspanel(see“LightpathdiagnosticsLEDs”on
page124).
Step4.IfthechecklogLEDonthelightpathdiagnosticspanelislit,checktheIMMeventlogforfaulty
Pwrrailandcompletethefollowingsteps.Table17“Componentsassociatedwithpowerrail
errors”onpage157
identifiesthecomponentsthatareassociatedwitheachPwrrailandthe
orderinwhichtotroubleshootthecomponents.
a.Disconnectthecablesandpowercordstoallinternalandexternaldevices(see“Internalcable
routingandconnectors”onpage179).Leavethepower-supplycordsconnected.
b.ForPwrrail1error,completethefollowingsteps:
1.(Trainedtechnicianonly)Replacethesystemboard.
2.(Trainedtechnicianonly)Replacethemicroprocessor.
c.Forotherrailerrors(Pwrrail1error,seeStepb.onpage156),removeeachcomponent
thatisassociatedwiththefaultyPwrrail,oneatatime,inthesequenceindicatedinTable
17“Componentsassociatedwithpowerrailerrors”onpage157
,restartingtheservereach
time,untilthecauseoftheovercurrentconditionisidentified.
156Systemx3550M4InstallationandServiceGuide