Lenovo ThinkSmart Hub, Hardware Maintenance Manual

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External monitor problems
Problem Solution
An external monitor screen is blank while the
monitor is connected to the hub.
• Ensure that the HDMI cable is connected to the hub and the
monitor correctly and securely.
• Select HDMI signals in the signal source setting of the monitor.
• Restart the monitor.
• Change the HDMI cable.
The image on an external monitor screen is
not clear.
Reset the screen resolution.
• Right-click a blank area on the desktop.
• Click Display settings .
• Set the screen resolution to be 1920 x 1080 pixels.
Network problems
Problem Solution
The hub cannot connect to an Ethernet LAN.
• 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 your network
environment. Check with your LAN administrator for the necessary
networking software.
• Set the same duplex for the switch port and the adapter. If you
configured the adapter 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.
When a Gigabit Ethernet model hub is used at
a speed of 1000 Mbps, the Ethernet LAN
connection fails or errors occur.
Connect the network cable to the Ethernet connector using Category
5 wiring and a 100 BASE-T hub/switch (not 100 BASE-X).
My hub is a Gigabit Ethernet model, but it
cannot be connected to the network at 1000
Mbps, but at only 100 Mbps.
• Try another cable.
• Set the link partner to auto-negotiate.
• Set the switch to be 802.3ab-compliant (gigabit over copper).
The Wi-Fi feature does not work.
It is not recommended that you connect to a Wi-Fi network. If you
connect to the Wi-Fi network that needs account authentication, the
connection will be lost when you log in the conference room system.
Connect your hub to a local network through the Ethernet connector
on your hub with an Ethernet cable.
Chapter 5
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Troubleshooting, diagnostics, and recovery
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