Lenovo System x3650 M4 HD - Page 42

CMOS clear
jumper (JP1)
UEFI boot backup
jumper (JP7)
System TPM physical
presence jumper (JP20)
Switch block 3 (SW3)
NMI button
1
2
3
4
off on
12
3
1
2
3
1
2
3
Figure16.System-boardswitches,jumpers,andbuttons
Thefollowingtabledescribesthejumpersonthesystemboard.
Table3.Systemboardjumpers
JumpernumberJumpernameJumpersetting
JP1
CMOSclearjumper•Pins1and2:Normal(default).
•Pins2and3:Clearsthereal-timeclock(RTC)
registry.
JP7UEFIbootbackupjumper
•Pins1and2:Normal(default).Loadsthe
primaryserverfirmwareROMpage.
•Pins2and3:Loadsthesecondary(backup)
serverfirmwareROMpage.
JP20
SystemTPMphysicalpresence
jumper
•Pins1and2:Normal(default).
•Pins2and3:Indicatesaphysicalpresenceto
thesystemTPM.
1.Ifnojumperispresent,theserverrespondsasifthepinsaresettothedefault.
2.ChangingthepositionoftheUEFIbootbackupjumper(JP7)frompins1and2topins2and3beforetheserver
isturnedonalterswhichflashROMpageisloaded.Donotchangethejumperpinpositionaftertheserveris
turnedon.Thiscancauseanunpredictableproblem.
30LenovoSystemx3650M4HDInstallationandServiceGuide