Lenovo ThinkPad T420 User Manual page 224

1. Press F1 to go to the ThinkPad Setup.
2. Press F9 and then press Enter to load the default setting.
3. Press F10 and then press Enter to restart the system.
If you still have a problem, have the computer serviced.
• Message: 0271: Check date and time settings
Solution: Neither the date nor the time is set in the computer. Set the date and time, using the "ThinkPad
Setup" on page 177.
• Message: 1802: Unauthorized network card is plugged in - Power off and remove the network card.
Solution: The mini PCI Express network card is not supported on this computer. Remove it.
• Message: 1820: More than one external fingerprint readers are attached. Power off and remove all but
the reader that you set up within your main operating system.
• Solution: Power off and remove all but the reader that you set up within your main operating system.
• Message: 2000: ThinkVantage Active Protection sensor diagnostics failed.
• Solution: ThinkVantage Active Protection sensor is not working correctly. Have the computer serviced.
• Message: 2100: Detection error on HDD0 (Main HDD)
Solution: The hard disk is not working. Have the hard disk serviced.
• Message: 2101: Detection error on HDD1 (Ultrabay HDD)
Solution: The hard disk is not working. Have the hard disk serviced.
• Message: 2102: Detection error on HDD2 (Mini SATA)
Solution: The Mini SATA device is not working. Have the Mini SATA device serviced.
• Message: 2110: Read error on HDD0 (Main HDD)
Solution: The hard disk is not working. Have the hard disk serviced.
• Message: 2111: Read error on HDD1 (Ultrabay HDD)
Solution: The hard disk is not working. Have the hard disk serviced.
• Message: 2112: Read error on HDD2 (Mini SATA)
Solution: The Mini SATA device is not working. Have the Mini SATA device serviced.
• Message: 2200: Machine Type and Serial Number are invalid.
• Solution: Machine Type and Serial Number are invalid. Have the computer serviced.
• Message: 2201: Machine UUID is invalid.
• Solution: Machine UUID is invalid. Have the computer serviced.
• Message: The power-on password prompt
Solution: A power-on password or a supervisor password is set. Type the password and press Enter to
use the computer (refer to "Using passwords" on page 89). If the power-on password is not accepted, a
supervisor password might have been set. Type the supervisor password and press Enter. If you still see
the same error message, have the computer serviced.
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User Guide