Table2.Numericerrorcodes(continued)
Symptomorerror
FRUoraction,insequence
0191
SystemSecurity—InvalidRemoteChangerequested.
1.RuntheThinkPadSetupprogram,andthensave
currentsettingbypressingF10.
2.Systemboard.
0199
SystemSecurity—Securitypasswordretrycount
exceeded.
1.RuntheThinkPadSetupprogram,andthensave
thecurrentsettingbypressingF10.
2.Systemboard.
0251
SystemCMOSchecksumbad—Defaultconguration
used.
1.Chargethebackupbatteryformorethan8hours
byconnectingtheacpoweradapter.
2.ReplacethebackupbatteryandruntheThinkPad
setupprogramtoresetthetimeanddate.
0271
Real-timeclockerror.Checkdateandtimesettings.
RuntheThinkPadSetupprogramtoresetthetime
anddate.
1802
Unauthorizednetworkcardispluggedin—Turnoffand
removetheminiPCInetworkcard.
1.RemoveMiniPCInetworkcard.
2.Systemboard.
1820
Morethanoneexternalngerprintreaderisattached.
Poweroffandremoveallbutthereaderthatyousetup
withinyourmainoperatingsystem.
Removeallbutthereaderthatyousetupforthe
authentication.
2000
HardDriveActiveProtectionsensordiagnostics
failed.Press<Esc>tocontinue.Press<F1>toenter
SETUP
1.Undockdockingstationorportreplicatorifitis
attachedtotheThinkPadNotebook.
2.PlacetheThinkPadNotebookonahorizontalsurface.
Donotapplyanyphysicalshocktothecomputer.
3.RunDiagnostics➙ThinkPadDevices➙HDD
ActiveProtectionTest.
2100
DetectionerroronHDD0(MainHDD)
1.Reseattheharddiskdrive.
2.Mainharddiskdrive.
3.Systemboard.
2101
DetectionerroronHDD1(UltrabayHDD)
1.Reseattheharddiskdrive.
2.Ultrabayharddiskdrive.
3.Systemboard.
2102
DetectionerroronHDD2(MiniSATA)
1.ReseattheMiniSATAdevice.
2.MiniSATAdevice.
3.Systemboard.
2110
ReaderroronHDD0(MainHDD)
1.Reseattheharddiskdrive.
2.Mainharddiskdrive.
3.Systemboard.
2111
ReaderroronHDD1(UltrabayHDD)
1.Reseattheharddiskdrive.
2.Ultrabayharddiskdrive.
3.Systemboard.
2112
ReaderroronHDD2(MiniSATA)
1.ReseattheMiniSATAdevice.
2.MiniSATAdevice.
3.Systemboard.
2200
MachineTypeandSerialNumberareinvalid.
Systemboard.
2201
MachineUUIDisinvalid
Systemboard.
44ThinkPadT420andT420iHardwareMaintenanceManual
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