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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 le.
• 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
notication 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 prole or AV prole.
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 prole, select Bluetooth Hands-free Audio and click the Set Default
button. If you are using the AV prole, 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
48 ThinkCentre E73z Hardware Maintenance Manual