Lenovo ThinkPad X200 7458 User Manual page 26

If one of the following error code messages is displayed on the screen, have the
computer serviced:
0175: Bad CRC1, stop POST task
0177: Bad SVP data, stop POST task. Checksum of the supervisor password in the
EEPROM is not correct.
0187: EAIA data access error
0188: Invalid RFID serialization information area
0189: Invalid RFID configuration information area
0192: System Security - Embedded Security hardware tamper detected.
0260: System timer error
0270: Real time clock error
02D0: System cache error
02F4: EISA CMOS not writable
02F5: DMA test failed
02F6: Software NMI failed
02F7: Fail-safe timer NMI failed
Fan error
Thermal sensing error
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ThinkPad X200 Tablet Service and Troubleshooting Guide