Lenovo x3550 M5 - Video Problems; Solving Power Problems

Table22.UniversalSerialBus(USB)portproblemsandactions
•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”onpage36
formoreinformation).
3.IfyouareusingaUSBhub,disconnecttheUSBdevicefromthehuband
connectitdirectlytotheserver.
Videoproblems
Usethisinformationtosolvevideoproblems.
See“Monitorandvideoproblems”onpage77.
Solvingpowerproblems
Usethisinformationtosolvepowerproblems.
Powerproblemscanbedifficulttosolve.Forexample,ashortcircuitcanexistanywhereonanyofthe
powerdistributionbuses.Usually,ashortcircuitwillcausethepowersubsystemtoshutdownbecauseof
anovercurrentcondition.Todiagnoseapowerproblem,usethefollowinggeneralprocedure:
Step1.Turnofftheserveranddisconnectallpowercords.
Step2.Checkforloosecablesinthepowersubsystem.Alsocheckforshortcircuits,forexample,ifa
loosescrewiscausingashortcircuitonacircuitboard.
Step3.CheckforanyerrorsindicatedbytheoperatorinformationpanelorLCDoperatingpanelassembly
(see“Operatorinformationpanel”onpage19or“LCDoperatingpanelassembly”onpage19).
Step4.IfthechecklogLEDontheoperatorinformationpanelislit,checktheIMMeventlogforfaultyPwr
railandcompletethefollowingsteps.Table23“Componentsassociatedwithpowerrailerrors”
onpage89identifiesthecomponentsthatareassociatedwitheachPwrrailandtheorderin
whichtotroubleshootthecomponents.
a.Disconnectthecablesandpowercordstoallinternalandexternaldevices.Leavethe
power-supplycordsconnected.
b.ForPwrrail1error,completethefollowingsteps:
1.(Trainedtechnicianonly)Replacethesystemboard.
2.(Trainedtechnicianonly)Replacethemicroprocessor.
c.Forotherrailerrors(Pwrrail1error,seestep4b),removeeachcomponentthatisassociated
withthefaultyPwrrail,oneatatime,inthesequenceindicatedinTable23“Components
associatedwithpowerrailerrors”onpage89,restartingtheservereachtime,untilthecause
oftheovercurrentconditionisidentified.
88LenovoSystemx3550M5InstallationandServiceGuide