ThinkPad E550, User Manual

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– 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 above
solution 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 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 : The Wake On LAN feature is not working.
Solution : Ensure that Wake On LAN is enabled in ThinkPad Setup. If it is, check with your LAN
administrator for the necessary settings.
• Problem : My computer is a Gigabit Ethernet model, it 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 : I cannot connect to the network using the built-in wireless network card.
Solution : Make sure that:
• Your wireless LAN driver is the latest version.
• Your computer is within range of a wireless access point.
• The wireless radio is enabled.
Note: If you are using the Windows 7 operating system, click Show hidden icons on the Windows
notification area. The Access Connections icon is displayed. For more information about the icon, refer to
the Access Connections help information system.
For the Windows 7 operating system, check the Network Name (SSID) and your encryption information. Use
the Access Connections program to verify this case-sensitive information.
Bluetooth problems
Note: Check your connection anytime and make sure that no other Bluetooth-enabled device is searching for
the device to which you want to connect. Simultaneous searching is not allowed in the Bluetooth connection.
• Problem : Sound does not come from the Bluetooth headset/headphone but comes from the local
speaker even though the Bluetooth headset/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. Go to Control Panel and click Hardware and Sound ➙ Sound ➙ Playback .
Chapter 8
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Troubleshooting computer problems
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