HP ProDesk 600 Maintenance And Service Manual page 186

Diagnostics reports a failure.
Cause
The cable is not securely connected.
The cable is attached to the incorrect connector.
There is a problem with the cable or a device at the other end
of the cable.
Network controller interrupt is shared with an expansion
board.
The network controller is defective.
Diagnostics passes, but the computer does not communicate with the network.
Cause
Network drivers are not loaded, or driver parameters do not
match current configuration.
The network controller is not configured for this computer.
Network controller stopped working when an expansion board was added to the computer.
Cause
Network controller interrupt is shared with an expansion
board.
The network controller requires drivers.
The expansion board installed is a network card (NIC) and
conflicts with the embedded NIC.
176 Chapter 8 Troubleshooting without diagnostics
Solution
Ensure that the cable is securely attached to the network
connector and that the other end of the cable is securely
attached to the correct device.
Ensure that the cable is attached to the correct connector.
Ensure that the cable and device at the other end are
operating correctly.
Under the Computer Setup Advanced menu, change the
resource settings for the board.
Contact an authorized service provider.
Solution
Make sure the network drivers are loaded and that the driver
parameters match the configuration of the network controller.
Make sure the correct network client and protocol is installed.
Select the Network and Sharing Center icon in the
Control Panel and configure the network controller.
To access Control Panel in Windows 7, click Start, and then
select Control Panel.
To access Control Panel in Windows 8, from the Start screen,
type c, and then select Control Panel.
Solution
Under the Computer Setup Advanced menu, change the
resource settings for the board.
Verify that the drivers were not accidentally deleted when the
drivers for a new expansion board were installed.
Under the Computer Setup Advanced menu, change the
resource settings for the board.