How to check network card is working or not?

A network card, also known as a network adapter or network interface card (NIC), is a hardware component that allows your computer to connect to a network and access the Internet. It plays a crucial role in transmitting data between your computer and other devices in the network. If you are experiencing network connectivity issues, it is essential to determine whether your network card is working properly or not. Here’s a guide to help you check the functionality of your network card.

1. Confirm Physical Connection

Ensure that the network cable is securely plugged into both the network card and the router or modem. Check for any physical damage to the cable, such as cuts or bends, as these can affect network connectivity.

2. Check Lights on the Network Card

Look for blinking lights on the network card. The presence of blinking lights indicates that the network card is receiving and transmitting data. If the lights are not blinking, it could be a sign of a faulty network card.

3. Restart Your Computer

Restarting your computer can sometimes resolve network issues. A system reboot helps to refresh network configurations and may fix any temporary glitches affecting the network card’s functionality.

4. Verify Network Card in Device Manager (Windows)

On Windows, open the Device Manager by right-clicking on the Start button and selecting “Device Manager.” Expand the “Network adapters” category, and check if your network card is listed. If it has a yellow exclamation mark or a red “X” icon, it indicates a problem with the driver or the card itself.

5. Use Network Troubleshooter (Windows)

Windows provides a built-in network troubleshooter that can diagnose and fix common networking problems. Initiate the troubleshooter by going to “Settings > Network & Internet > Status > Network troubleshooter.”

6. Check Network Settings

Ensure that the network settings on your computer are configured correctly. Make sure that DHCP is enabled if you are using dynamic IP addressing, or enter the correct IP address, subnet mask, and gateway if using static IP addressing.

7. Test with Another Computer

Connect your network cable to another computer and check if it can access the network and the Internet. If the alternate computer works fine, it indicates that the issue lies with your computer’s network card.

8. Update Network Card Drivers

Outdated or incompatible network card drivers can result in connectivity problems. Visit the manufacturer’s website or use a reliable driver update software to download and install the latest drivers for your network card.

9. **How to Check Network Card is Working or Not?**

Use the built-in network card diagnostic tool to check if your network card is working correctly. This tool is available in the BIOS/UEFI settings of your computer or through dedicated network card diagnostic software provided by the manufacturer. Run the diagnostic tool and follow the on-screen instructions to troubleshoot any issues with your network card.

Frequently Asked Questions:

1. How can I tell if my network card is bad?

If you are experiencing consistent network connectivity issues, such as slow or intermittent connection, limited or no network connectivity, or if the network card is not detected in Device Manager, it could indicate a faulty network card.

2. Can a faulty network card be repaired?

In most cases, a faulty network card cannot be repaired and needs to be replaced with a new one.

3. How often should I replace my network card?

Network cards are designed to last several years. However, if you frequently encounter network-related problems or need to upgrade to a faster network standard, you may consider replacing your network card.

4. What are the common causes of network card failure?

Common causes of network card failure include power surges, physical damage, outdated drivers, or software conflicts.

5. Can a network card cause internet connection issues?

Yes, a malfunctioning network card can cause various internet connection issues such as slow speeds, intermittent connectivity, or no connectivity at all.

6. How much does a network card cost?

The cost of a network card can vary depending on the brand, model, and features. On average, a network card can range from $10 to $100 or more.

7. What are the different types of network cards?

There are several types of network cards available, including Ethernet cards, wireless network cards (Wi-Fi), and fiber optic network cards.

8. What is the role of drivers in network card functionality?

Drivers are software programs that enable proper communication between the operating system and the hardware. Network card drivers ensure the network card functions correctly and enable it to connect to networks.

9. Can a network card be upgraded?

Yes, network cards can often be upgraded. However, the upgrade compatibility will depend on the computer’s specifications and the availability of compatible network card options.

10. Why does my network card get hot?

Network cards can get hot during heavy network usage or prolonged usage. However, if the network card becomes excessively hot or overheats, it may indicate a hardware issue.

11. Is it worth using a USB network adapter instead of a built-in network card?

Using a USB network adapter can be a convenient solution if your built-in network card is faulty or if you need to add network connectivity to a device without a built-in card. However, USB adapters may not offer the same performance as dedicated network cards.

12. Are network cards only for desktop computers?

No, network cards are also used in laptops and other devices to enable network connectivity. Laptops often have integrated network cards, while external network cards are available for devices without built-in options.


A properly functioning network card is crucial for maintaining a stable and reliable network connection. By following the steps mentioned above and troubleshooting your network card, you can determine whether it is working or not. If you continue experiencing network issues, it may be necessary to seek professional assistance or consider replacing the network card.

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