Lenovo x3550 M5 - System Pulse Leds

Note:WhenthedcLEDisblinkingata1Hzrate,thePSUisatSTANDBYmode.Thatis,nodcpower
outputisfromthisPSU.
SystempulseLEDs
UsethisinformationtodiagnosepossibleerrorsthatareindicatedbythesystempulseLEDs.
ThefollowingLEDsareonthesystemboardandhelpyoutomonitorthesystempower-onandpower-off
sequencingandbootprogress(see“System-boardLEDs”onpage29forthelocationoftheseLEDs).
Table5.SystempulseLEDs
LEDDescriptionAction
FPGAheartbeat
Power-onandpower-off
sequencing.
1.IftheLEDblinksat1Hz,itisfunctioning
properlyandnoactionisnecessary.
2.IftheLEDisnotblinking,(trainedtechnician
only)replacethesystemboard.
IMMheartbeatIMM2.1heartbeatbootprocess.
Thefollowingstepsdescribethedifferentstages
oftheIMM2.1heartbeatsequencingprocess.
1.WhenthisLEDisblinkingfast
(approximately4Hz),thisindicates
thattheIMM2.1codeisintheloading
process.
2.WhenthisLEDgoesoffmomentarily,this
indicatesthattheIMM2.1codehasloaded
completely.
3.WhenthisLEDgoesoffmomentarilyand
thenstartsblinkingslowing(approximately
1Hz),thisindicatesthatIMM2.1isfully
operational.Youcannowpressthe
power-controlbuttontopoweronthe
server.
4.IfthisLEDdoesnotblinkwithin30seconds
ofconnectingapowersourcetotheserver,
(trainedtechnicianonly)replacethesystem
board.
PCIriser-cardLEDs
UsethisinformationtoviewPCIriser-cardLEDs.
ThefollowingillustrationshowsthelocationofthePCIriser-cardLEDs.
Chapter3.Troubleshooting63