Server User Manual
Note:Dependingonthemodel,yourservermightlookslightlydifferentfromtheillustrationsinthistopic.
TheserverisdesignedsothatLEDsremainlitwhentheserverisconnectedtoanacpowersourcebutis
notturnedon,providedthatthepowersupplyisoperatingcorrectly.Thishelpsyoutoisolateproblems
whentheserverisnotturnedon.ManyerrorsarerstindicatedbyaliterrorLEDonthediagnosticpanel
oftheserver.IfanLEDislit,oneormoreLEDselsewhereintheservermightalsobelittodirectyouto
thesourceoftheerror.
ThefollowingillustrationshowstheTMMstatusLEDandsystemfanerrorLEDsonthesystemboard.
Figure34.SystemboardLEDs
1TMMstatusLED(alsoknownasBMCstatusLED)
ThisLEDindicatesthestatusoftheonboardThinkServerManagementModule(TMM,alsoknownasBMC).
TMMstatusLED
Color
Description
OnGreen
TheTMMisnotready.
Off
None
TheTMMhasnopowerorhasfailed.
Blinking
Green
TheTMMisworking.
2-7SystemfanerrorLEDs
WhenasystemfanerrorLEDonthesystemboardislit,itindicatesthatthecorrespondingsystemfanis
operatingslowlyorhasfailed.Tosolvetheproblem,youmightneedtoreinstallorreplacethesystemfan.
See“Replacingasystemfan”onpage149
.Ifitisasystemboardproblem,contacttheLenovoCustomer
SupportCenter.
50ThinkServerUserGuide