Symptom-to-FRU index

This section contains following information:

v“Numeric error codes”

v“Error messages” on page 43

v“Beep symptoms” on page 44

v“No-beep symptoms” on page 44

v“LCD-related symptoms” on page 45

v“Intermittent problems” on page 46

v“Undetermined problems” on page 46

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 46.

Note:

For a device not supported by diagnostic codes in the ThinkPad computers, see the manual for that device.

Numeric error codes

Table 1. Numeric error codes

Symptom or error

FRU or action, in sequence

 

 

0175

System board.

Bad CRC1, stop POST task—The EEPROM

 

 

checksum is not correct.

 

 

 

 

 

0176

1.

Run BIOS Setup Utility, and save the

System Security—The system has been

 

current setting by pressing F10.

tampered with.

2.

System board.

 

 

0177

System board.

Bad SVP data, stop POST task—The

 

 

checksum of the supervisor password in the

 

 

EEPROM is not correct.

 

 

 

 

 

0182

1.

Run BIOS Setup Utility. Press F9, and

Bad CRC2. Enter BIOS Setup and load Setup

 

Enter to load the default setting. Then

defaults.—The checksum of the CRS2 setting

 

save the current setting by pressing F10.

in the EEPROM is not correct.

2.

System board.

 

 

 

0185

1.

Run BIOS Setup Utility. Press F9, and

Bad startup sequence settings. Enter BIOS

 

Enter to load the default setting. Then

Setup and load Setup defaults.

 

save the current setting by pressing F10.

 

 

 

Related service information

39

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Lenovo 7453FDU, 74536BU, 74506CU, 745369U, 74506BU, 74506AU, 745069U, 745068U, 7454GKU Symptom-to-FRU index, Numeric error codes
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745369U, 7454GKU, 745068U, 7453FDU, 74506AU specifications

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