•“Bluetooth problems” on page 108

For more information, see “Help and Support” on page 117.

Ethernet problems

For Ethernet problems, select your symptom from the following list:

•“Your computer cannot connect to the network” on page 107

•“The adapter stops working for no apparent reason” on page 107

•“If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection fails or errors occur” on page 108

•“If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead, it connects at 100 Mbps” on page 108

Your computer cannot connect to the network

Symptom: Your computer cannot connect to the network.

Actions: Make sure that:

•The cable is installed properly.

The network cable must be securely connected to both the Ethernet connector of your computer and the RJ45 connector of the hub. The maximum allowable distance from the computer to hub is 100 meters. If the cable is connected and the distance is within acceptable limits but the problem persists, try a different cable.

•The cable is installed properly.

•You are using the correct device driver.

On the Windows 7 operating system and the Windows Vista operating system , do the following:

1.Click Start ➙ Control Panel.

2.Click Hardware and Sound.

3.Click Device Manager. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

4.If an exclamation mark is displayed next to an adapter name under Network adapters, you might not use the correct driver or the driver is not enabled. To update the driver, right-click the highlighted adapter.

5.Click Update Driver Software, and then follow the instructions on the screen.

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

If you configured the adapter for full duplex, make sure 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 apparent reason

Symptom: The adapter stops working for no apparent reason.

Action: The network driver files may be corrupt or missing. Update the driver by referring to the “Solution” description for the procedure to make sure that the correct device driver is installed.

The Wake on LAN feature is not working

Symptom: The Wake on LAN (WOL) feature is not working.

Chapter 10. Troubleshooting and diagnostics 107

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Lenovo 900 Ethernet problems, Your computer cannot connect to the network, Adapter stops working for no apparent reason
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1271, 3664, 3629, 3660, 3654 specifications

Lenovo has established a strong presence in the computing market with a diverse lineup of laptops and desktops, catering to various user needs. Among these, the Lenovo 3676, 3578, 3598, 3594, and 3668 models stand out due to their commendable features and specifications.

The Lenovo 3676 is known for its robust performance capabilities, delivering optimal efficiency through high-performance processors. It typically features AMD Ryzen or Intel Core processors, ensuring smooth multitasking and responsiveness. Users can expect a generous amount of RAM, enhancing the device’s capability to handle demanding applications seamlessly. Its storage options often include SSDs, which significantly improve load times and overall system responsiveness.

The 3578 model is tailored for everyday computing tasks, making it ideal for students and professionals alike. This model usually features a sleek design while providing access to modern connectivity options like USB-C, HDMI, and multiple USB ports. Its display often offers vibrant colors and adequate resolution, making it suitable for both work and multimedia consumption.

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In summary, the Lenovo 3676, 3578, 3598, 3594, and 3668 models each offer unique features tailored to different segments of the market. Whether for gaming, everyday use, or family activities, Lenovo continues to innovate and provide tailored solutions that appeal to a broad audience. With their impressive specifications and robust performance, these models reinforce Lenovo's reputation as a reliable brand in the computing landscape.
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