If you’re experiencing NetInstall service issues:
Make sure required services are started on the server. See NetInstall requirements.
If your NetBoot client computers don’t start:
Make sure cables are properly connected and that the computer and server are getting power.
Sometimes a computer might not start immediately because other computers are putting a heavy demand on the network. Wait a few minutes and try starting again.
If you installed memory or an expansion card in the client computer, make sure it’s installed properly.
If the computer has a local hard disk with a System Folder on it, disconnect the Ethernet cable and try to start the computer from the local hard disk, then reconnect the Ethernet cable and try to start the computer from the network.
Boot the client computer from a local disk and verify that it’s getting an IP address from DHCP.
On a diskless or systemless client, start from a system CD and use Startup Disk preferences to select a boot image.