Symptom-To-Fru Index; Numeric Error Codes - Lenovo ThinkPad X1 Yoga 20LD Hardware Maintenance Manual

Symptom-to-FRU index

This section contains following information:
• "Numeric error codes" on page 36
• "Error messages" on page 38
• "Beep symptoms" on page 38
• "No-beep symptoms" on page 40
• "LCD-related symptoms" on page 40
• "Intermittent problems" on page 40
• "Undetermined problems" on page 41
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
0177
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
0183
Bad CRC of Security Settings in EFI Variable. Enter the
ThinkPad Setup program.
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.
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Hardware Maintenance Manual
FRU or action, in sequence
System board
1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. System board
System board
System board
System board
1. Charge the battery.
2. Battery
1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. System board