Chapter 3. Troubleshooting - Lenovo ThinkPad L420 User Manual

Chapter 3. Troubleshooting

If you experience the following problem with the Wireless WAN adapter, try the solution provided to solve
the problem.
Problem: I have correctly installed the Wireless WAN adapter on my computer, but the computer fails to
recognize the Wireless WAN adapter.
Solution: Reset the Unified Extensible Firmware Interface (UEFI) Basic Input/Output System (BIOS)
configuration of your computer to the default settings by doing the following:
1. Turn on the computer.
2. When you see the ThinkPad logo screen, press F1 to enter the BIOS.
3. Press F9, and then select Yes to load the default configuration.
4. Press F10 to save configuration changes and exit by selecting Yes. The computer restarts.
Note: After the computer restarts, the BIOS changes are automatically saved. There is no need to reset
the BIOS configuration again the next time you start your computer.
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