If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead, it connects at 100 Mbps

Symptom: If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead, it connects at 100 Mbps.

Actions:

Try another cable.

Ensure that the link partner is set to auto-negotiate.

Ensure that the switch is 802.3ab-compliant (gigabit over copper).

A wireless LAN problem

Symptom: You cannot connect using the built-in wireless networking card.

Actions:

Ensure that your wireless LAN driver is the latest version. Check the Web site and verify the driver version supported by Access Connections is the latest documented in the readme file.

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

Ensure that the wireless radio is enabled by double-clicking the Access Connections icon in the Windows notification area.

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

A wireless WAN problem

Message: Unauthorized WAN card is plugged in - Power off and remove the WAN card.

Action: The WAN card is not supported on this computer. Remove it.

Note: Some computer models do not have a wireless WAN.

Bluetooth problem

Symptom: 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 the Headset profile or AV profile.

Action: Do the following:

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

2.Open Control Panel.

3.Click Hardware and Sound Sound.

4.Select the Playback tab.

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

6.Click OK to close the Sound window.

Option problems

Use this information to diagnose problems with Lenovo hardware options that do not have their own troubleshooting information.

Select your symptom from the following list:

“An option that was just installed does not work” on page 49

48ThinkCentre E73z Hardware Maintenance Manual

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Lenovo E73Z Option problems, Wireless LAN problem, Wireless WAN problem, Bluetooth problem, Click Hardware and Sound Sound