Lenovo System x3550 M4 - Page 145

Figure90.DCpower-supplyLEDs
Thefollowingtabledescribestheproblemsthatareindicatedbyvariouscombinationsofthepower-supply
LEDsonadcpowersupplyandsuggestedactionstocorrectthedetectedproblems.
DCpower-supplyLEDs
INOKOUTOKError(!)DescriptionActionNotes
OnOnOff
Normaloperation.
OffOffOff
Nodcpowertothe
serveroraproblem
withthedcpower
source.
1.Checkthedcpowertothe
server.
2.Makesurethatthepower
cordisconnectedtoa
functioningpowersource.
3.Restarttheserver.Ifthe
errorremains,checkthe
power-supplyLEDs.
4.Iftheproblemremains,
replacethepower-supply.
Thisisanormal
conditionwhennodc
powerispresent.
OffOffOn
Thepowersupply
hasfailed.
Replacethepowersupply.
OffOnOff
Thepowersupply
hasfailed.
Replacethepowersupply.
OffOnOn
Thepowersupply
hasfailed.
Replacethepowersupply.
OnOffOff
Power-supplynot
fullyseated,faulty
systemboard,or
thepowersupply
hasfailed.
1.Reseatthepowersupply.
2.Followactionsinthe“Power
problems”onpage148
.
3.IftheOVERSPECLEDon
thelightpathdiagnosticsis
lit,followtheactionsin“Light
pathdiagnosticsLEDs”on
page124
.
4.IftheOVERSPECLEDon
thelightpathdiagnosticsis
notlit,checktheerrorLEDs
onthesystemboardandthe
IMM2errormessages.Follow
stepsin“Powerproblems”on
Typicallyindicatesa
power-supplyisnot
fullyseated.
Chapter4.Troubleshooting131