Lenovo L421, L520, L420 manual Numeric error codes

•“Error messages” on page 44

•“No-beep symptoms” on page 44

•“LCD-related symptoms” on page 44

•“Intermittent problems” on page 45

•“Undetermined problems” on page 45

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 45.

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 (beeps, if any)	FRU or action, in sequence
0187	System board.
EAIA data access error—The access to EEPROM is failed.
(two short beeps)
0189	System board.
Invalid RFID configuration information area—The
EEPROM checksum is not correct.
(two short beeps)
0190	1.	Charge the battery pack.
Critical low-battery error	2.	Battery pack.
(two short beeps)
0191	1.	Run BIOS Setup Utility, and then save current
System Security—Invalid Remote Change requested.		setting by pressing F10.
	2.	System board.
0210	Change keyboard, and restart the computer.
Stuck Key
(two short beeps)
0211	Run interactive tests of the keyboard and the auxiliary
Keyboard error	input device.
(two short beeps)
0230	System board.
Shadow RAM error—Shadow RAM fails at offset nnnn.
(two short beeps)
0231	1.	DIMM.
System RAM error—System RAM fails at offset nnnn.	2.	System board.
(two short beeps)

42Hardware Maintenance Manual