Lenovo System x3250 M5 - Page 42

Figure19.Locationoftheswitches,jumpers,andbuttonsonthesystemboard
Thefollowingtabledescribesthejumpersonthesystemboard.
Table3.Jumpersdefinition
JumpernameDescription
ClearCMOSjumper•Pins1and2:KeepCMOSdata(default)
•Pins2and3:ClearCMOSdata
Lowsecurityjumper
(JP12)
•Pins1and2:Lowsecurityasserted
•Pins2and3:Lowsecuritynotasserted(default)
UEFIbootbackup
jumper(JP16)
•Pins1and2:Normal(default).LoadstheprimaryserverfirmwareROMpage.
•Pins2and3:Bootfrombackup.Loadsthesecondary(backup)serverfirmwareROM
page.
Notes:
1.Ifnojumperispresent,theserverrespondsasifthepinsaresettothedefault.
2.ChangingthepositionoftheUEFIbootbackupjumperfrompins1and2topins2and3beforetheserveris
turnedonalterswhichflashROMpageisloaded.Donotchangethejumperpinpositionaftertheserveris
turnedon.Thiscancauseanunpredictableproblem.
ThefollowingtabledescribesthefunctionsoftheSW1switchblockonthesystemboard.
28LenovoSystemx3250M5InstallationandServiceGuide