HP ProDesk 680 G4 PCI MT Maintenance And Service Manual page 93

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.
System setup utility reports unprogrammed EEPROM.
Cause
Unprogrammed EEPROM.
Solution
Reinstall the network drivers using the Windows recovery tools.
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.
Solution
Contact an authorized service provider.
Solving network problems 85