Lenovo System x3550 M4 - Page 42

Figure17.System-boardswitches,jumpers,andbuttons
Thefollowingtabledescribesthejumpersonthesystemboard.
Table2.Systemboardjumpers
JumpernumberJumpernameJumpersetting
JP1
CMOSclearjumper•Pins1and2:Normal(default).
•Pins2and3:Clearsthereal-timeclock(RTC)
registry.
JP2UEFIbootbackupjumper
•Pins1and2:Normal(default).Loadsthe
primaryserverfirmwareROMpage.
•Pins2and3:Loadsthesecondary(backup)
serverfirmwareROMpage.
JP6
SystemTPMphysicalpresence
jumper
•Pins1and2:Normal(default).
•Pins2and3:Indicatesaphysicalpresenceto
thesystemTPM.
Notes:
1.Ifnojumperispresent,theserverrespondsasifthepinsaresettothedefault.
2.ChangingthepositionoftheUEFIbootbackupjumper(JP2)frompins1and2topins2and3beforetheserver
isturnedonalterswhichflashROMpageisloaded.Donotchangethejumperpinpositionaftertheserveris
turnedon.Thiscancauseanunpredictableproblem.
ThefollowingtabledescribesthefunctionsoftheSW3switchblockonthesystemboard.
28Systemx3550M4InstallationandServiceGuide