Lenovo System x3500 M4 - System Pulse Leds

Table12.Power-supplyLEDs
ACPower-supplyLEDs
ACDCErrorDescriptionActionNotes
OnOnOff
Normal
operation
OffOffOff
Noacpower
totheserveror
aproblemwith
theacpower
source.
1.Checktheacpowertotheserver.
2.Makesurethatthepowercordis
connectedtoafunctioningpower
source.
3.Restarttheserver.Iftheerrorremains,
checkthepower‐supplyLEDs.
4.Iftheproblemremains,replacethe
powersupply.
Thisisanormal
conditionwhenno
acpowerispresent.
OffOffOn
Faultypower
supply.
1.Makesurethatthepowercordis
connectedtoafunctioningpower
source.
2.Replacethepowersupply.
Thishappensonly
whenasecond
powersupplyis
providingpowerto
theserver.
OffOnOff
Faultypower
supply
Replacethepowersupply.
OffOnOn
Faultypower
supply
Replacethepowersupply.
OnOffOff
Powersupply
notfullyseated,
faultysystem
board,orfaulty
powersupply
1.Reseatthepowersupply.
2.IfthesystemboarderrorLEDisnotlit,
replacethepowersupply.
3.(Trainedtechnicianonly)Ifthesystem
boarderrorLEDislit,replacethe
systemboard.
Typicallyindicates
thatapowersupply
isnotfullyseated.
OnOffor
Flashing
On
Faultypower
supply
Replacethepowersupply.
OnOnOn
Powersupply
isfaultybutstill
operational
Replacethepowersupply.
SystempulseLEDs
ThissectiondescribesthesystempulseLEDsonthesystemboardthatmonitorsthesystempower-onand
power-offandbootprogress.
ThefollowingLEDsareonthesystemboardandmonitorthesystempower-onandpower-offsequencing
andbootprogress(see“System-boardLEDsandcontrols”onpage31forthelocationoftheseLEDs).
140Systemx3500M4InstallationandServiceGuide