I Have Connected An Option To My Computer, But It Does Not Work - Lenovo ThinkCentre M79 Hardware Maintenance Manual

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Hardware maintenance manual (186 pages)

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Table of Contents

• The cable is installed properly.

• You are using the correct device driver.

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

If you configured the adapter for full duplex, ensure that 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.

The adapter stops working for no reason

Solution: The network driver files might be corrupt or missing. Update the driver by referring to the "Solution"

description for the previous problem to ensure that the latest device driver is installed.

The Wake On LAN feature is not working

Solution: Enable the Wake On LAN (WOL) feature in the BIOS program.

My computer is a Gigabit Ethernet model and I use a speed of 1000 Mbps, but the connection fails

or errors occur

Solution: Connect the network cable to the Ethernet connector using Category 5 wiring and a 100 BASE-T

hub/switch (not 100 BASE-X).

My computer is a Gigabit Ethernet model, but it cannot be connected to the network at 1000 Mbps,

but at only 100 Mbps

Solutions:

• Try another cable.

• Set the link partner to auto-negotiate.

• Set the switch to be 802.3ab-compliant (gigabit over copper).

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

Solution:

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

2. Open Control Panel.

Note: For detailed information on how to open Control Panel on Windows 8.1, see "Accessing Control

Panel on the Windows 8.1 operating system" on page 49.

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 then click Set Default. If

you are using the AV profile, select Stereo Audio, and then click Set Default.

6. Click OK.

Note: Bluetooth is supported only on some computer models.