Lenovo T420i manual Symptom-to-FRU index, Numeric error codes

Symptom-to-FRU index

This section contains following information:

•“Numeric error codes” on page 43

•“Error messages” on page 45

•“Beep symptoms” on page 46

•“No-beep symptoms” on page 46

•“LCD-related symptoms” on page 46

•“Intermittent problems” on page 48

•“Undetermined problems” on page 48

The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type.

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 48.

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	FRU or action, in sequence
0177	System board.
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
0182	1.	Run the ThinkPad Setup program. Press F9, and
Bad CRC2. Enter the ThinkPad Setup program and load		Enter to load the default setting. Then save the
Setup defaults.—The checksum of the CRS2 setting in		current setting by pressing F10.
the EEPROM is not correct.	2. System board.
0183
Bad CRC of Security Settings in EFI Variable. Enter the
ThinkPad Setup program.
0187	System board.
EAIA data access error—The access to EEPROM is failed.
0188	System board.
Invalid RFID Serialization Information Area.
0189	System board.
Invalid RFID configuration information area—The
EEPROM checksum is not correct.
0190	1.	Charge the battery pack.
Critical low-battery error	2.	Battery pack.

Chapter 4. Related service information 43