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Network Interface Card (NIC)

Check the NIC LED

Check the PC's back panel to find the network adapter's Link LED, located next to the ethernet jack. If the LED is on, the ethernet or crossover cable is seated properly. If there is no link light, make sure the ethernet or crossover cable is connected to the correct port and that it is firmly seated.

Check Device Manager

Check the Device Manager to ensure that the network adapter's driver is properly installed. [Windows] Go to Control Panel > System > Device Manager > Network Adapters [Properties]. If there is a yellow exclamation mark by the NIC there is a problem. Remove and reinstall the NIC: See the documentation for your NIC and be sure that you have the correct drivers.

Ping the IP

Bring up a command prompt and attempt to ping your IP. If you cannot ping the IP, the driver may be incorrect or not working properly. Try reinstalling the drivers, but before you do, be sure you have the driver for the NIC on a CD or floppy. See How to install a network adapter and your NIC documentation or the manufacturer's website for details.

Cannot bind IP to a NIC

If you have a machine that cannot bind an IP to a NIC because it is already assigned to an old NIC that has been physically removed from the machine and it does not appear in the device manager. The fix for XP and 2000: MSKB Q269155

 

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