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Beep errors
Table 6. Beep errors
Problem
Solution
One short beep, pause, three short beeps, pause, three
more short beeps, and one short beep
The memory module has a problem. Have the computer
serviced.
Three short beeps, pause, one short beep, pause, one
more short beep, and three short beeps
PCI resource allocation failure. Power off the computer
and remove the PCI devices. If the beeps persist, have
the computer serviced.
One long and two short beeps
The video function has a problem. Have the computer
serviced.
Four cycles of four short beeps
The Security Chip has a problem. Have the computer
serviced.
Five short beeps The system board has a problem. Have the computer
serviced.
Five short beeps, pause, ve short beeps, and pause
Continue to boot immediately when the error was
detected.
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. Check for error messages during startup.
Follow the appropriate corrective actions for power-on self-test (POST) error messages.
2. Verify that the latest UEFI BIOS for your model has been installed.
3. Verify the proper memory conguration and compatibility including the maximum memory size and the
memory speed.
4. Run the Lenovo Solution Center program.
Networking problems
The following are the most common networking problems:
Ethernet problems
• Problem: The computer cannot connect to the network.
Solution: Make sure that:
– The Lenovo USB 2.0 Ethernet Adapter or supported ThinkPad OneLink Dock is connected correctly to
your computer.
– The cable is installed correctly.
The network cable must be securely connected both to the Lenovo USB 2.0 Ethernet Adapter of your
computer and to the RJ45 connector of the hub. The maximum allowable distance from the computer
to hub is 100 meters. If the cable is connected and the distance is within acceptable limits but the
problem persists, try a different cable.
– You are using the correct device driver. To install the correct driver, do the following:
1. Open Control Panel and click Hardware and Sound ➙ Device Manager. If you are prompted for
an administrator password or conrmation, type the password or provide conrmation.
Chapter 9. Troubleshooting computer problems 85