Acer Network Device Altos R520 - Manual (Page 145)

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• Make sure the memory modules have been populated according
to the system requirements.
External device connected to a USB connector does not work.
Do the following:
• Reduce the number of external devices connected to a USB hub.
• Refer to the documentation that came with the device.
Server cannot connect to a network
• Make sure the network cable is securely attached to the correct
connector at the system rear panel.
• Try a different network cable.
• Make sure you are using the correct and the current drivers.
• Make sure the driver is loaded and the protocols are bound.
Problems with the network
Network status indicator does not light.
Do the following:
• Check the cabling and network equipment to make sure that all
cables are properly connected.
• Reinstall the network drivers.
• Try another port or hub on the switch.
Diagnostics pass but the connection fails.
Make sure the network cable is securely attached.