Dear TP-Link Support Team,

I am facing an issue with my TP-Link Archer C7 v4 router regarding the 5GHz wireless network.

Router Details:

• Model: Archer C7 v4

• Firmware Version: 1.0.8 Build 20190411 rel.65590(5553)

Issue:
The 5GHz WiFi network is visible, but no device is able to connect to it. Devices including MacBook and mobile phones show the following error:

“The Wi-Fi network could not be joined.”

Troubleshooting Already Performed:

• Changed security from WPA/WPA2 to Open network

• Changed encryption to AES

• Tested multiple channels including Channel 36

• Changed channel width settings

• Rebooted router multiple times

• Disabled Private Wi-Fi Address on Apple devices

• Forgot and reconnected the network

• Tested with multiple devices

• Factory settings tested partially

Even with no password/security enabled, devices are still unable to join the 5GHz network.

The 2.4GHz network appears to work normally, while the issue only affects the 5GHz band.

I suspect there may be:

• Firmware-related compatibility issues

• Corrupted 5GHz wireless configuration

• Or possible 5GHz hardware/radio failure

Please advise:

1. Whether this is a known firmware issue

2. Recommended stable firmware version for Archer C7 v4

3. Any recovery/reset procedure for the 5GHz radio

4. Whether the hardware may be defective

Thank you.

Best Regards,
Muhammad Afzaal