Fixing RTL8111H-CG Not Recognized by Your PC

Fixing RTL8111H-CG Not Recognized by Your PC

The issue of the RTL8111H-CG network adapter not being recognized by your PC can arise due to several potential causes. Below, we will break down the possible reasons for this fault and guide you through a detailed, step-by-step troubleshooting process to resolve it.

Possible Causes:

Driver Issues The most common reason for this issue is missing, outdated, or corrupted Drivers for the RTL8111H-CG network adapter. If the driver isn't installed correctly or needs an update, your PC may fail to recognize the adapter.

Hardware Problems A malfunctioning or damaged network card, whether due to wear and tear or physical damage, can result in the PC not recognizing it.

BIOS Settings Sometimes, certain settings in your computer's BIOS can prevent the network card from being properly detected.

Connection Issues Loose or improperly connected cables or slots may also cause the network adapter to be unrecognized.

Operating System Conflicts Certain software or operating system updates might cause conflicts, leading to device recognition issues.

Step-by-Step Solution:

1. Check Hardware Connections: Power off your PC and unplug it from the power source. Open your computer's case (if it's a desktop) or check the network card slot (on a laptop). Ensure the RTL8111H-CG card is properly seated in its slot. If it's a desktop, you can remove it carefully and reinstall it to ensure it's firmly connected. Check for any visible damage on the network card or motherboard. If there is physical damage, you may need to replace the adapter. 2. Update or Reinstall the Network Drivers : Go to the Device Manager on your PC (Press Win + X, then select Device Manager). Expand the Network adapters section. If you see a yellow triangle or an exclamation mark next to the RTL8111H-CG adapter, it indicates a driver issue. Right-click on the network adapter and select Update driver. Choose Search automatically for updated driver software. If Windows doesn't find an update, visit the manufacturer's website (Realtek) to download the latest driver for your RTL8111H-CG card. If updating doesn't work, you can try uninstalling the device (right-click > Uninstall), then restart your PC. Windows should attempt to reinstall the driver automatically. 3. Check BIOS Settings: Reboot your PC and enter the BIOS settings (usually by pressing F2, F10, or Del during startup). Look for the Integrated Peripherals or Onboard Devices section. Ensure that the LAN controller or Network Interface Controller (NIC) is enabled. Save your changes and exit the BIOS. Reboot your system and check if the PC now detects the network adapter. 4. Run Windows Network Troubleshooter: Right-click on the network icon in the taskbar and select Troubleshoot problems. Follow the on-screen prompts to let Windows diagnose and attempt to fix any network-related issues automatically. 5. Check for OS Conflicts: If you recently installed an operating system update, a conflict might have occurred. Try rolling back to a previous system restore point before the update. To do this, type System Restore in the Start menu search, select Create a restore point, then click on System Restore. Choose a restore point where your system was working correctly and follow the prompts. 6. Try the Adapter on Another PC: If possible, test the RTL8111H-CG network card in another PC. If the card is still not recognized, there may be a hardware failure. In this case, consider replacing the adapter.

Additional Tips:

Check for Windows Updates: Sometimes, an update can provide the necessary fix for hardware compatibility. Clear the CMOS: In case there is a BIOS corruption, clearing the CMOS can reset the BIOS settings and might help. Try a Different PCI Slot: If you're using a desktop PC, try moving the network card to a different PCI slot to rule out a slot issue.

Conclusion:

The issue of your RTL8111H-CG network adapter not being recognized can be caused by software or hardware problems. By following the steps outlined above, including ensuring proper connections, updating drivers, and adjusting BIOS settings, you should be able to identify and resolve the issue. If all else fails, consider consulting a professional technician or replacing the adapter.