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Solution: The thermal sensor has problem. Shut down the computer immediately and have the computer
serviced.
Beep errors
Table 5. Beep errors
Beeps
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep (1-3-3-1
beeps)
One long and two short beeps
Three short beeps, pause, one short beep, pause, one
short beep, pause, and three more short beeps (3-1-1-3
beeps)
Four cycles of four short beeps
Five short beeps
Five short beeps, pause, five more short beeps, and
pause
Memory module problems
Print these instructions now and keep the instructions with your computer for reference later.
If your memory module is not operating properly, check the following items:
1. Verify that the memory module is installed and seated correctly in your computer.
It might be necessary to remove all added memory modules to test the computer with only the
factory-installed memory modules, and then reinstall the memory module one at a time to ensure
a proper connection.
2. Check for error messages during startup.
Follow the appropriate corrective actions for power-on self-test (POST). See "Error messages" on
page 130.
3. Verify that the latest UEFI for your model has been installed.
4. Verify the proper memory configuration and compatibility including the maximum memory size and the
memory speed.
5. Run diagnostic programs. See "Diagnosing problems" on page 129.
Networking problems
The following are the most common networking problems.
Ethernet problems
• Problem: The computer cannot connect to the network.
Solution: Make sure that:
132
User Guide
Solution
Memory problem. Shut down the computer immediately
and have the computer serviced.
Video problem. Shut down the computer immediately and
have the computer serviced.
PCI resource problem. Shut down the computer
immediately and have the computer serviced.
*
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.
System board problem. Shut down the computer
immediately and have the computer serviced.
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.
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