@pra4abt 

Hi,

I am surprised to hear the Archer C2300 V1 supports DFS channels. Was that added in a firmware update?
 

  @woozle 

No, it does not support DFS channels. There is no WIFI signal from the router. The problem seems to have started after enabling Smart Connect.

The issue persisted after disabling Smart Connect and performing multiple router restarts, and performed factory reset. 

Also, I am seeing the message in the WIFI configuration screen, "5Ghz band is restricted in your country", and the option to change 5Ghz settings(channel;, mode, width) is greyed out.  From what i get from chatGPT is that the router may have been stuck in the DFS mode and is unable to come out of it. so posted if there is possibility to change WIFI settings from Tether APP. 

More details : https://community.tp-link.com/en/home/forum/topic/855468

  @pra4abt 

Oh, now I see.

This particular problem has been coming up here in the forum every once in a while, for the C2300 as well as some other models. (e.g. https://community.tp-link.com/en/home/forum/topic/181012)

However, I have never seen a post that provided a fix for it. Usually the recommendation was to contact TP-Link's support in your country and ask for a replacement if the router is still covered under warranty. (usually 3 years from purchase in most countries)

  @woozle 

Hello, I had a meeting with the TP-Link technical support about the issue I reported. What they informed me is that the hardware is region-locked, and there is no option to change the region in the router. The product has also reached the end of its life, and no support is available. What a shame. 

  @pra4abt 

Where did you get this C2300 V1 from?

Was the 5 GHz Wi-Fi originally working fine and just now it stopped working?

5 GHz Wi-Fi should be allowed in basically any region on earth, only the channel allocations vary.

  @woozle 

It’s an old router, purchased from Amazon about eight years ago. The 5 GHz band had been working fine until recently. The issues began after Smart Connect was accidentally enabled, and since then, the Wi‑Fi has stopped working. I’m not sure what changed internally due to enabling that feature.