Lenovo E425, E525 manual Wireless LAN problem, Bluetooth problems, Solution

3.Click Update Driver Software, and then follow the instructions on the screen.

–The switch port and the adapter have the same duplex setting.

If you configured the adapter for full duplex, make sure the switch port is also configured for full duplex. Setting the wrong duplex mode can degrade performance, cause data loss, or result in lost connections.

–You have installed all networking software that is necessary for your network environment. Check with your LAN administrator for the necessary networking software.

•Problem: The adapter stops working for no apparent reason.

Solution: The network driver files might be corrupt or missing. Update the driver by referring to the “Solution” description in the preceding problem for the procedure to make sure that the correct device driver is installed

•Problem: If your computer is a Gigabit Ethernet model and you use the a speed of 1000 Mbps, the connection fails or errors occur.

Solution:

–Use Category 5 wiring and make sure that the network cable is securely connected.

–Connect to a 1000 BASE-T hub/switch (not 1000 BASE-X).

•Problem: Your computer cannot connect to the network at 1000 Mbps. Instead, it connects at 100 Mbps. Solution:

–Try another cable.

–Make sure that the link partner is set to auto-negotiate.

–Make sure that the switch is 802.3ab-compliant (gigabit over copper).

A wireless LAN problem

•Problem: You cannot connect using the built-in wireless network card.

Solution: Make sure that your wireless LAN driver is the latest version installed. Check the Web site and confirm the driver version supported by Access Connections is the latest documented in the readme file.

Make sure that your computer is within range of a wireless access point.

Make sure that the wireless radio is enabled by double-clicking the Access Connections icon on the taskbar.

Note: For instructions on how to display the Access Connections status icon and the wireless status icon in the Windows notification area, refer to the Access Connections help information system.

Check Network Name (SSID) and your encryption information. Use the Access Connections program to verify this case-sensitive information.

Bluetooth problems

•Problem: Sound does not come from the Bluetooth headset or headphone but comes from the local speaker even though the headset or headphone is connected using a Headset profile or AV profile.

Solution: Do the following:

1.Exit the application that uses the sound device (for example, Windows Media Player).

2.Open Control Panel by clicking Start ➙ Control Panel, and click Hardware and Sound ➙ Sound then select the Playback tab.

3.If you are using a Headset profile, select Bluetooth Hands-free Audio and click the Set Default button. If you are using an AV profile, select Stereo Audio and click the Set Default button.

4.Click OK to close the Sound window.

Chapter 9. Troubleshooting computer problems 121