Solving network problems
Some common causes and solutions for network problems are listed in these tables. The guidelines do not
discuss the process of debugging the network cabling.
Network driver does not detect network controller
Use this information to troubleshoot the computer.
Cause Solution
Network controller is disabled. 1. Run Computer Setup and enable network controller.
2. Enable the network controller in the operating system using
Device Manager.
To access Device Manager in Windows 10, type device
manager in the taskbar search box, and then select Device
Manager from the list of applications.
Incorrect network driver. Check the network controller documentation for the correct driver
or obtain the latest driver from the manufacturer’s website.
Network status link light never blinks
Use this information to troubleshoot the computer.
NOTE: The network status light is supposed to blink when there is network activity.
Cause Solution
No active network is detected. Check cabling and network equipment for proper connection.
Network controller is not set up properly. Check for the device status within Windows, such as Device
Manager for driver load and the Network Connections applet within
Windows for link status. To access Device Manager in Windows 10,
type device manager in the taskbar search box, and then
select Device Manager from the list of applications.
Network controller is disabled. 1. Run Computer Setup and enable network controller.
2. Enable the network controller in the operating system using
Device Manager.
To access Device Manager in Windows 10, type device
manager in the taskbar search box, and then select Device
Manager from the list of applications.
Network driver is not properly loaded. Reinstall network drivers.
System cannot autosense the network. Disable autosensing capabilities, and force the system into the
correct operating mode.
Diagnostics reports a failure
Use this information to troubleshoot the computer.
66 Chapter 5 Troubleshooting without diagnostics ENWW
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