Lenovo ThinkPad T550, User Manual

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• 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
Firmware Interface Specification. If the user selects “No”, all data is kept, but the operating system or
applications will not be able to create, modify, or delete data in the storage.
If this error happens at a service center, Lenovo authorized service personnel will clean up the non-volatile
system UEFI variable storage using the above solution.
Beep errors
Table 6. Beep errors
Beeps Solution
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep (1-3-3-1
beeps) Memory problem. Shut down the computer immediately
and have the computer serviced.
One long and two short beeps Video problem. Shut down the computer immediately and
have the computer serviced.
Three short beeps, pause, one short beep, pause, one
short beep, pause, and three more short beeps (3-1-1-3
beeps)
PCI resource problem. Shut down the computer
immediately and have the computer serviced.
Four cycles of four short beeps TCG
*
-compliant functionality-related problem (might
be the BIOS code validation failure). Shut down the
computer immediately and have the computer serviced.
*
TCG is the abbreviation for Trusted Computing Group.
Five short beeps
System board problem. Shut down the computer
immediately and have the computer serviced.
Five short beeps, pause, five more short beeps, and
pause TCG-compliant functionality-related problem (might be
the TPM initialization failure). Continue with the boot
process and call the Lenovo service center for technical
support.
Memory module problems
Print these instructions now and keep the instructions with your computer for reference later.
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User Guide