Compaq N2400 - TaskSmart - 1 GB RAM Administration Manual page 319

The ACT LED does not light.
1. Make sure that you have loaded the correct network drivers.
2. The network may be idle. Try accessing a server.
3. The NIC is not transmitting or receiving data. Run diagnostics, and then
try another NIC.
4. Make sure to use two-pair cable for TX wiring.
The NIC stopped working when another NIC was
added to the computer.
1. Make sure the cable is connected to the NC3120 NIC.
2. Try reseating the newest NIC.
The NIC stopped working without apparent
cause.
1. Run the diagnostics.
2. Try reseating the NIC first, and then try a different slot if necessary.
3. The network driver files may be corrupt or deleted. Delete and then
reinstall the drivers.
Troubleshooting C-45