Network Problems - Lenovo IdeaCentre A540-24ICB Hardware Maintenance Manual

Network problems

Note: The Wi-Fi and Bluetooth features are optional.
Problem
The computer cannot connect to an Ethernet
LAN.
When a Gigabit Ethernet model computer is
used at a speed of 1000 Mbps, the Ethernet
LAN connection fails or errors occur.
The Wake On LAN (WOL) feature does not
work.
The Wi-Fi feature does not work.
Solution
• Connect the cable from the Ethernet connector to the RJ45
connector of the hub.
• Enable the Ethernet LAN feature in UEFI BIOS.
• Enable the Ethernet LAN adapter.
1. Go to Control Panel and view by large icons or small icons.
2. Click Network and Sharing Center ➙ Change adapter
settings.
3. Right-click the Ethernet LAN adapter icon and click Enable.
• Update or reinstall the Ethernet LAN driver.
• Install all networking software that is necessary for the local
network environment. Check with the local LAN administrator for
the necessary networking software.
• Set the same duplex for the switch port and the adapter. If the
adapter is configured for full duplex, ensure that the switch port is
also configured for full duplex. Setting a wrong duplex mode might
degrade performance, cause data loss, or result in lost
connections.
Connect the network cable to the Ethernet connector using Category
5 wiring and a 100 BASE-T hub/switch (not 100 BASE-X).
Enable the Wake On LAN feature in UEFI BIOS.
• Enable the Wi-Fi feature in UEFI BIOS.
• Enable all Wi-Fi devices.
1. Open the Start context menu.
2. Click Device Manager. Type the administrator password or
provide confirmation if prompted.
3. Expand Network adapters to display all network devices.
4. Right-click each Wi-Fi device, and then click Enable device.
• Enable the Wi-Fi feature in Windows Settings.
1. Open the Start menu.
2. Click Settings ➙ Network & Internet ➙ Wi-Fi.
3. Enable the Wi-Fi feature.
• Update or reinstall the Wi-Fi driver.
.
Chapter 5 Troubleshooting and recovery
45