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 - HP ProDesk 400 G7 SFF Maintenance And Service Manual

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.
The network controller is defective.

Diagnostics passes, but the computer does not communicate with the network

Use this information to troubleshoot the computer.
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
Use this information to troubleshoot the computer.
Cause
The network controller requires drivers.

Network controller stops working without apparent cause

Use this information to troubleshoot the computer.
Cause
The cable is not securely connected.
The network controller is defective.

Cannot connect to network server when attempting remote system installation

Use this information to troubleshoot the computer.
ENWW
Solution
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.
Be sure that the cable is attached to the correct connector.
Be sure that the cable and device at the other end are operating
correctly.
Contact an authorized service provider.
Solution
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 is installed.
Select the Network and Sharing Center icon in the Control Panel,
and configure the network controller. To access Control Panel in
Windows 10, type control panel in the taskbar search box,
and then select Control Panel from the list of applications.
Solution
Verify that the drivers were not accidentally deleted when the
drivers for a new expansion board were installed.
Solution
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.
Contact an authorized service provider.
Solving network problems 67