Lenovo System x3550 M4 - System Pulse Leds

DCpower-supplyLEDs
INOKOUTOKError(!)DescriptionActionNotes
page148and“Solvingpower
problems”onpage156until
theproblemissolved.
OnOffOn
Thepowersupply
hasfailed.
Replacethepowersupply.
OnOnOn
Thepowersupply
hasfailed.
Replacethepowersupply.
SystempulseLEDs
UsethisinformationtodiagnosepossibleerrorsthatareindicatedbythesystempulseLEDs.
ThefollowingLEDsareonthesystemboardandhelpyoutomonitorthesystempower-onandpower-off
sequencingandbootprogress(see“System-boardLEDs”onpage29
forthelocationoftheseLEDs).
Table15.SystempulseLEDs
LEDDescriptionAction
RTMMheartbeat
Power-onandpower-off
sequencing.
1.IftheLEDblinksat1Hz,itisfunctioning
properlyandnoactionisnecessary.
2.IftheLEDisnotblinking,(trainedtechnician
only)replacethesystemboard.
IMMheartbeatIMM2heartbeatbootprocess.
Thefollowingstepsdescribethedifferentstages
oftheIMM2heartbeatsequencingprocess.
1.WhenthisLEDisblinkingfast
(approximately4Hz),thisindicates,
thattheIMM2codeisintheloading
process.
2.WhenthisLEDgoesoffmomentarily,this
indicatesthattheIMM2codehasloaded
completely.
3.WhenthisLEDgoesoffmomentarilyand
thenstartsblinkingslowing(approximately
1Hz),thisindicatesthatIMM2isfully
operational.Youcannowpressthe
power-controlbuttontopower-onthe
server.
4.IfthisLEDdoesnotblinkwithin30seconds
ofconnectingapowersourcetotheserver,
(trainedtechnicianonly)replacethesystem
board.
PCIriser-cardLEDs
UsethisinformationtoviewPCIriser-cardLEDs.
ThefollowingillustrationshowsthelocationofthePCIriser-cardLEDs.
132Systemx3550M4InstallationandServiceGuide