In order to check if your computer has a faulty network card, there are several steps you can take. Although each system is different and the exact method used to test the network card will vary depending on the type of card and the operating system in use, these steps will help you diagnose and troubleshoot a potential issue:
Step 1: Visually Inspect the Network Card
Before starting any testing, it’s important to take a good look at the network card itself. Make sure the card is firmly seated in its slot, and that all of the pins, contacts and cables appear undamaged. If any of the cable connectors are loose, this could be the cause of your connection issues.
Step 2: Run the Network Troubleshooter
Most operating systems come with an integrated network troubleshooter. This tool can be used to identify any potential problems with your network connection, and may be able to detect whether or not your network card is faulty. To launch the troubleshooter in Windows, go to Control Panel > Network and Internet > Network and Sharing Center > Troubleshoot Problems.
Step 3: Reset the Network Card
If the troubleshooter doesn’t identify a problem with your network card, you can try resetting the card to its default state. You can do this by accessing the Device Manager (Windows Key + R > devmgmt.msc) and right-clicking the network card entry. Here, select Uninstall Device, wait a few seconds, then reboot your computer. This should reset the card and reinstall the drivers.
Step 4: Update the Network Card Drivers
If you still don’t have a connection after resetting the card, you may need to update the drivers. With the device manager open, right-click the network card entry again and select Update Driver Software. Then follow the instructions to search for and install the most up-to-date drivers for your card.
Step 5: Check for Network Activity
If all else fails, you can try to look for signs of network activity. On Windows PC’s, you can open the Network Connections window (Control Panel > Network and Internet > Network Connections), and look for any blinking lights next to the network card entry. This indicates that the card is communicating with your router and the internet.
Step 6: Replace the Network Card
If none of the above solutions resolve the issue, then it’s likely that your network card is faulty and needs to be replaced. Make sure to back up any data and settings before removing the card, then power down your computer, unscrew any mounting brackets, and remove the card. You can then reinsert a new card in its place, install the drivers, and then reboot your system.
By following these steps, you should be able to determine whether or not your computer has a faulty network card. Keep in mind that it may be easier in the long run to purchase a new card than to attempt to troubleshoot and repair a faulty one.