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• Closing the lid.
• Pressing the power button.
Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power
plan settings.
When the power is turned on, the computer returns from hibernation mode and resumes operation. The
hibernation file in the boot record on the hard disk drive is read, and system status is restored from the hard
disk drive.
Symptom-to-FRU index
This section contains following information:
• "Numeric error codes" on page 36
• "Error messages" on page 38
• "Beep errors" on page 38
• "LCD-related symptoms" on page 39
• "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
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.
36
P1/X1 ExtremeHardware 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
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