@Jah_Ith_Ber Have you reserved the 192.168.0.12 IP address to the TV box on the C6? To locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox...

@Arpi Check if you can make it alive by TFTP firmware recovery: https://community.tp-link.com/en/home/stories/detail/582

@sakchaij I have sent you a PM, please check and confirm if the issue is resolved.

@JeffreyCurtis What is the specific macOS version of this 2017 MacBook Pro? How about connecting this 2017 MacBook Pro to the 2.4G network, will it connect properly when enabling the AX mode?

@Yuenster Yes, you can do that. Connect all the wireless clients to the Guest network, and uncheck the "Allow guests to access the local network", then they cannot access the local resources nor...

@Yuenster The Archer C7 doesn't support this kind of VLAN settings, you can add a switch which supports VLAN settings, then connect the wired devices to the VLAN switch directly.