Lenovo ThinkCentre Edge 72z, Hardware Maintenance Manual

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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.
• 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
Symptom: You cannot connect using the built-in wireless networking card.
Actions:
• Make sure 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.
• 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 in the
Windows notification area.
Note: If your computer is preinstalled with the Windows 7 operating system, click Show hidden icons in
the Windows notification area. The Access Connections icon is displayed. For more information about
the icon, see the Help in Access Connections.
• 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: Seek technical assistance for help to remove the unauthorized WAN card. See “Additional
information resources” on page 31 for more information.
Note: Some computer models do not have a wireless WAN.
Bluetooth problems
Bluetooth is available with some certain computer models.
For Bluetooth problems, select your symptom from the following list:
• “Sound does not come from the Bluetooth headphone” on page 46
• “PIM items sent from the Windows 7 operating system cannot be received correctly” on page 47
Sound does not come from the Bluetooth headphone
Symptom: Sound does not come from the Bluetooth headset/headphone but comes from the local speaker
even though the headset/headphone is connected using 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 the Control Panel by clicking Start
➙
Control Panel .
3. Click Hardware and Sound ➙ Sound .
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ThinkCentre Edge Hardware Maintenance Manual