Numeric Error Codes - Lenovo THINKPAD L420 Hardware Maintenance Manual

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