Networking Problems - Lenovo ThinkCentre M83z User Manual

Networking problems

The following are the most common networking problems.
For more information, see "Help and Support" on page 75.
Ethernet problems
Your computer cannot connect to the network
Actions: Ensure that:
• The cable is installed properly.
The network cable must be securely connected to both the Ethernet connector of your computer and
the register jack 45 (RJ 45) 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.
• You are using the correct device driver.
On the Windows 7 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 be using 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.
On the Windows 8.1 operating system, do the following:
1. 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 17.
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 be using 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, 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 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 ensure that the correct device driver is installed.
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Chapter 10 Troubleshooting and diagnostics
67