Numeric Error Codes - Lenovo ThinkPad T520 Hardware Maintenance Manual

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 49.
Note: For a device not supported by diagnostic codes in the ThinkPad Notebooks, see the manual for
that device.

Numeric error codes

Table 2. Numeric error codes
Symptom or error
0177
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
0182
Bad CRC of Security Settings in EEPROM. Enter ThinkPad
Setup.
0183
Bad CRC of Security Settings in EFI Variable. Enter
ThinkPad Setup.
0187
EAIA data access error—The access to EEPROM is failed.
0188
Invalid RFID Serialization Information Area.
0189
Invalid RFID configuration information area—The
EEPROM checksum is not correct.
0190
Critical low-battery error
0191
System Security—Invalid Remote Change requested.
0199
System Security— Security password retry count
exceeded.
0251
System CMOS checksum bad— Default configuration
used.
0271
Real-time clock error. Check date and time settings.
1802
Unauthorized network card is plugged in—Turn off and
remove the miniPCI network card.
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Hardware Maintenance Manual
FRU or action, in sequence
System board
1. Run ThinkPad Setup. Press F9, and Enter to load
the default setting. Then save the current setting
by pressing F10.
2. System board
System board
System board
System board
1. Charge the battery pack.
2. Battery pack
1. Run ThinkPad Setup, and then save current
setting by pressing F10.
2. System board
1. Run ThinkPad Setup, and then save the current
setting by pressing F10.
2. System board
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.
Run ThinkPad Setup to reset the time and date.
1. Remove Mini PCI network card.
2. System board