HP Pro SFF 400 G9 - Diagnostics Passes, but the Computer Does Not Communicate with the Network; Network Controller Stopped Working When an Expansion Board was Added to the Computer; Network Controller Stops Working Without Apparent Cause; Cannot Connect to Network Server When Attempting Remote System Installation

Contact an authorized service provider.The network controller is defective.
Diagnostics passes, but the computer does not communicate with the network
Use this information to troubleshoot the computer.
SolutionCause
Be sure that the network drivers are loaded and that the driver
parameters match the configuration of the network controller.
Be sure that the correct network client and protocol are installed.
Network drivers are not loaded, or
driver parameters do not match current
configuration.
Select the Network and Sharing Center icon in the Control Panel, and
configure the network controller.
To access Control Panel in Windows, type control panel in the
taskbar search box, and then select Control Panel from the list of
applications.
The network controller is not configured for
this computer.
Network controller stopped working when an expansion board was added to the
computer
Use this information to troubleshoot the computer.
SolutionCause
Verify that the drivers were not accidentally deleted when the drivers for
a new expansion board were installed.
The network controller requires drivers.
Network controller stops working without apparent cause
Use this information to troubleshoot the computer.
Solution
Cause
Be sure 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.
The cable is not securely connected.
Contact an authorized service provider.The network controller is defective.
Cannot connect to network server when attempting remote system installation
Use this information to troubleshoot the computer.
Solution
Cause
Verify that network connectivity exists, a DHCP Server is present, and the
Remote System Installation Server contains the network interface card
(NIC) drivers for your NIC.
The network controller is not configured
properly.
System setup utility reports unprogrammed EEPROM
Use this information to troubleshoot the computer.
Solution
Cause
Contact an authorized service provider.Unprogrammed EEPROM.
62 Chapter 5 Troubleshooting without diagnostics