Lenovo ThinkPad X1 Carbon User Manual page 111

Solution: The EEPROM checksum is not correct (block # 4 and 5). The system board should be replaced,
and the universally unique identifier (UUID) needs to be reinstalled. Have the computer serviced.
• Message: 0190: Critical low-battery error
Solution: The computer turned off, because the battery power is low. Connect the ac power adapter to
the computer and charge the batteries.
• Message: 0191: System Security - Invalid remote change requested
Solution: The system configuration change has failed. Confirm the operation and try again. To clear the
error, enter ThinkPad Setup.
• Message: 0199: System Security - Security password retry count exceeded.
Solution: This message is displayed if you enter a wrong supervisor password more than three times.
Confirm the supervisor password and try again. To clear the error, enter ThinkPad Setup.
• Message: 0270: Real Time Clock Error.
Solution: System Real Time Clock is not functional. 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 ThinkPad
Setup.
• Message: 1802: Unauthorized network card is plugged in - Power off and remove the network card.
Solution: The wireless network card is not supported on this computer. Remove it.
• Message: 1820: More than one external fingerprint readers are attached.
Solution: Power off and remove all but the reader that you set up within your main operating system.
• Message: 2100: Detection error on SSD0 (M.2)
Solution: The solid-state disk is not working. Have the solid-state disk serviced.
• Message: 2110: Read error on SSD0 (M.2)
Solution: The solid-state disk is not working. Have the solid-state disk 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: Fan error
Solution: Cooling fan has failed. Shut down the computer immediately and have the computer serviced.
• Message: Thermal sensing error
Solution: The thermal sensor has problem. Shut down the computer immediately and have the computer
serviced.
• Message: Error: The System UEFI Variable Storage is nearly full.
Note: This error indicates that the operating system or applications cannot create, modify, or delete data
in the non-volatile system UEFI variable storage due to insufficient storage space after POST.
The non-volatile system UEFI variable storage is used by the UEFI BIOS and by the operating system or
applications. This error occurs when the operating system or applications store large amounts of data
in the variable storage. All data needed for POST, such as BIOS setup settings, chipset or platform
configuration data, are stored in a separate UEFI variable storage.
Solution: Press F1 to enter ThinkPad Setup after the error message is displayed. A dialog asks the user
for confirmation to clean up the storage. If the user selects "Yes", all data that were created by the
operating system or applications are deleted except global variables defined by the Unified Extensible
.
Chapter 8 Troubleshooting computer problems
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