Symptom-to-FRU indexThe symptom-to-FRU index in this section lists symptomsand errors and their possible causes. The most likelycause is listed first, in boldface type.Note: Do the FRU replacement or other actions in thesequence shown in the column headed “FRU oraction, in sequence.” If replacing a FRU does notsolve the problem, put the original part back in thecomputer. Do not replace a nondefective FRU.This index can also help you determine, during regularservicing, what FRUs are likely to need to be replacednext.A numeric error is displayed for each error detected inPOST or system operation. In the displays, n can be anynumber.If no numeric code is displayed, check the narrativedescriptions of symptoms. If the symptom is not describedthere, go to “Intermittent problems” on page 59.NoteFor an IBM device not supported by diagnosticcodes in the ThinkPad notebook computers, see themanual for that device.Numeric error codesSymptom or error FRU or action, in sequence0175Bad CRC1, stop POSTtask—The EEPROM checksumis not correct.System board.0176System Security—The Systemhas been tampered with.1. Run IBM BIOS SetupUtility and Load SetupDefaults.2. System board.0177Bad SVP data, stop POST task.System board.0182Bad CRC2. Enter BIOS Setupand load Setup Defaults.Run IBM BIOS Setup Utilityand Load Setup Defaults.0185Bad startup sequence settings.Enter BIOS Setup and loadsetup defaults.Run IBM BIOS Setup Utilityand Load Setup DefaultsSymptom-to-FRU indexThinkPad R40 53
