ChecktheLEDsonallthepowersupplies.IftheLEDsindicatethatthepowersuppliesareworking
correctly,dothefollowing:
1.Turnofftheserver.
2.Makesurethattheserveriscabledcorrectly.
3.Removeordisconnectthefollowingdevices,oneatatime,untilyoundthefailure.Turnontheserver
andrecongureiteachtime.
•Anyexternaldevices
•Surge-suppressordevice(ontheserver)
•Modem,printer,mouse,andnon-Lenovodevices
•Eachadapter
•Harddiskdrives
•Memorymodules:theminimumcongurationrequirementis1GBDIMMpermicroprocessor(2GB
inatwo-microprocessorconguration)
Thefollowingminimumcongurationisrequiredfortheservertostart:
•Onemicroprocessor
•One2GBDIMM
•Onepowersupply
•Powercord
•ServerRAIDSASadapter
•Systemboardassembly
4.Turnontheserver.Iftheproblemremains,suspectthefollowingcomponentsinthefollowingorder:
a.Powersupply
b.Power-supplycage
c.Memory
d.Microprocessor
e.Systemboard
Iftheproblemissolvedwhenyouremoveanadapterfromtheserverbuttheproblemrecurswhenyou
reinstallthesameadapter,suspecttheadapter;iftheproblemrecurswhenyoureplacetheadapterwitha
differentone,suspectthesystemboardorextendercard.
Ifyoususpectanetworkingproblemandtheserverpassesallthesystemtests,suspectanetworkcabling
problemthatisexternaltotheserver.
Eventlogs
Errorcodesandmessagesaredisplayedinthefollowingtypesofeventlogs:
•POSTeventlog:Thislogcontainsthethreemostrecenterrorcodesandmessagesthatweregenerated
duringthePOST.
•System-eventlog:ThislogcontainsallthePOSTandsystemmanagementinterrupt(SMI)events.
Systemeventlog
TheBMCimplementsthesystemeventlog(SEL)asspeciedintheIntelligentPlatformManagement
InterfaceSpecication,Version2.0.TheSELisaccessibleregardlessofthesystempowerstateviathe
BMC'sin-bandandout-of-bandinterfaces.
Diagnosticprogramsandmessages
Wheneverpossible,theBIOSoutputsthecurrentbootprogresscodesonthevideoscreen.Progress
codesare32-bitquantitiesplusoptionaldata.The32-bitnumbersincludeclass,subclass,andoperation
information.Theclassandsubclasseldspointtothetypeofhardwarebeinginitialized.Theoperationeld
representsthespecicinitializationactivity.Basedonthedatabitavailabilitytodisplayprogresscodes,a
Chapter3.Diagnostics25