Lenovo X301 Reset the password by running Bios Setup, Utility, Charge the backup battery for more

Table 2. Numeric error codes (continued)

Symptom or error	FRU or action, in sequence
0251	1.	Charge the backup battery for more
System CMOS checksum bad— Default		than 8 hours by connecting the AC
configuration used.		adapter.
	2.	Replace the backup battery and run BIOS
		Setup Utility to reset the time and date.
0252	Reset the password by running BIOS Setup
Password checksum bad—The password is	Utility.
cleared.
0260	1.	Charge the backup battery for more
System timer error.		than 8 hours by connecting the AC
		adapter.
	2.	Replace the backup battery and run BIOS
		Setup Utility to reset the time and date.
	3.	System board.
0270	1.	Charge the backup battery for more
Real-time clock error.		than 8 hours by connecting the AC
		adapter.
	2.	Replace the backup battery and run BIOS
		Setup Utility to reset the time and date.
	3.	System board.
0271	Run BIOS Setup Utility to reset the time
Date and time error—Neither the date nor	and date.
the time is set in the computer.
0280	1.	Load “Setup Default” in BIOS Setup
Previous boot incomplete— Default		Utility.
configuration used.	2.	DIMM.
	3.	System board.
02F0	1.	CPU.
CPU ID:xx Failed.	2.	System board.
02F4	1.	Load Setup Defaults in BIOS Setup
EISA CMOS not writable.		Utility.
	2.	Replace the backup battery.
	3.	System board.
02F5	1.	DIMM.
DMA test failed.	2.	System board.
02F6	1.	DIMM.
Software NMI failed	2.	System board.
02F7	1.	DIMM.
Fail-safe timer NMI failed	2.	System board.
1802	1.	Remove Mini PCI network card.
Unauthorized network card is plugged	2.	System board.
in—Turn off and remove the miniPCI
network card.
1803	1.	Remove the daughter card that you
Unauthorized daughter card is plugged		installed.
in—Turn off and remove the daughter card.	2. System board.
1804	1.	Remove the WAN card that you
Unauthorized WAN card is plugged		installed.
in—Power off and remove the WAN card.	2.	System board.

64ThinkPad X301 Hardware Maintenance Manual