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Note: Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or
action, in sequence.” If replacing a FRU does not solve the problem, put the original part back in the
computer. Do not replace a nondefective FRU.
This index can also help you determine, during regular servicing, what FRUs are likely to need to be
replaced next.
A numeric error is displayed for each error detected in POST or system operation. In the displays, n can
be any number.
If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not
described there, go to “Intermittent problems” on page 45.
Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the
manual for that device.
Numeric error codes
Table 2. Numeric error codes
Symptom or error
FRU or action, in sequence
0177: Bad SVP data, stop POST task. — The checksum
of the supervisor password in the EEPROM is not correct.
System board
0183: Bad CRC of Security Settings in EFI Variable.
Enter ThinkPad Setup. — The checksum of the Security
settings in the EFI Variable is not correct.
Enter ThinkPad Setup to correct Security settings in
the EFI Variable.
0187: EAIA data access error.
System board
0188: Invalid RFID Serialization Information Area. — The
EEPROM checksum is not correct (Block #0,1).
System board
0189: Invalid RFID conguration Information Area. — The
EEPROM checksum is not correct (Block #4,5).
System board
0190: Critical low-battery error • Charge the battery pack.
• Battery pack
0191: System Security - Invalid Remote Change
requested.
• Run ThinkPad Setup, and then save the current
setting by pressing F10.
• System board
0199: System Security - Security password retry count
exceeded.
• Run ThinkPad Setup, and then save the current
setting by pressing F10.
• System board
0251: System CMOS checksum bad - Default
conguration used
1. Charge the backup battery for more than 8 hours
by connecting the ac adapter.
2. Replace the backup battery and run ThinkPad Setup
to reset the time and date.
0253: EFI Variable Block Data was destroyed.
0271: Real-Time Clock Error. Check Date and Time
settings.
Run ThinkPad Setup to reset the time and date.
1802: Unauthorized network card is plugged in - Power
off and remove the mini PCI network card.
• Remove Mini PCI network card.
• System board
1820: More than one external ngerprint reader is
attached. Power off and remove all but the reader that
you set up within your main operating system.
Remove all but the reader that you set up for the
authentication.
42 Hardware Maintenance Manual