HP 280 G4 MT Maintenance And Service Manual page 83

Diagnostics passes, but the computer does not communicate with the network.
Cause
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.
Network controller stops working without apparent cause.
Cause
The files containing the network drivers are corrupted.
The cable is not securely connected.
The network controller is defective.
New network card will not boot.
Cause
New network card may be defective or may not meet industry-
standard specifications.
Cannot connect to network server when attempting Remote System Installation.
Cause
The network controller is not configured properly.
Solution
To access Control Panel in Windows 7, click Start, and then select
Control Panel.
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
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.
Solution
Reinstall the network drivers using the Recovery Disc Set in
Windows 7.
If necessary, download the softpaq from the web (from a different
computer).
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.
Contact an authorized service provider.
Solution
Install a working, industry-standard NIC, or change the boot
sequence to boot from another source.
Solution
Verify Network Connectivity, that a DHCP Server is present, and that
the Remote System Installation Server contains the NIC drivers for
your NIC.
Solving network problems 75