Lenovo ThinkPad X1 Carbon 20HQ, Hardware Maintenance Manual

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Symptom-to-FRU index
This section contains following information:
•
“Numeric error codes” on page 37
• “Error messages” on page 38
• “Beep errors” on page 38
• “LCD-related symptoms” on page 40
• “Intermittent problems” on page 40
• “Undetermined problems” on page 40
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 40.
Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the
manual for that device.
Numeric error codes
Table 1. 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 the
ThinkPad Setup program.
1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. System board
0187
EAIA data access error—The access to EEPROM is failed.
System board
0188
Invalid RFID Serialization Information Area.
System board
0189
Invalid RFID configuration information area—The
EEPROM checksum is not correct.
System board
0190
Critical low-battery error
1. Charge the battery.
2. Battery
0191
System Security—Invalid Remote Change requested.
1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. System board
Chapter 4
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Related service information
37