Lenovo System x3250 M4 - System-Board Leds

Table2.Jumpersdefinition(continued)
JumpernumberJumpernameJumpersetting
JP11TPMinitializationjumper
•Pins1and2:Normal(default).
•Pins2and3:InitiateTPM.
JP12
IMMSPIhalfROMenable
•Pins1and2:Disabled.
•Pins2and3:EnableIMMSPIhalf
ROM(default).
JP19Lowsecurity_Njumper
•Pins1and2:Normal(default).
•Pins2and3:Activatelowsecurity.
Notes:
1.Ifnojumperispresent,theserverrespondsasifthepinsaresetto1and2.
2.Changingthepositionofthebootblockjumperfrompins1and2topins2and3beforetheserveristurned
onalterswhichflashROMpageisloaded.Donotchangethejumperpinpositionaftertheserveristurnedon.
Thiscancauseanunpredictableproblem.
System-boardLEDs
Thefollowingillustrationshowsthelight-emittingdiodes(LEDs)onthesystemboard.
(cy1cd039)
DIMM 1
DIMM 2
DIMM 3
DIMM 4
Microprocessor
IMM2 hearbeat
LED
RTMM
Hearbeat LED
DIMM 1 - 4
error LEDs
Microprocessor
error LED
Standby power
LED
System board
error LED
Figure6.TheLEDsonthesystemboard
Note:Whenyoudisconnectthepowersourcefromtheserver,youlosetheabilitytoviewtheLEDsbecause
theLEDsarenotlitwhenthepowersourceisremoved.Beforeyoudisconnectthepowersource,make
anoteofwhichLEDsarelit,includingtheLEDsthatarelitontheoperationinformationpanelandLEDs
insidetheserveronthesystemboard
24LenovoSystemx3250M4InstallationandServiceGuide