Ok i upload my experience la.

- How old is your router? (some cheap router aged 3-5 years will start having wifi issues.)

- If you are having problems connecting 5Ghz with Windows desktop/ laptop. Go to Device manager. Uninstall the Wi-Fi driver. (Do not check Attempt to remove driver). After uninstall, restart PC. It should redetect automatically and Wifi will work again.

- Download older driver from manufacturer website.

- If you have laptop & windows 10/ 11, Update BIOS. This is super risky if you do not know what you are doing and do not have patience.


SO RECENTLY...

My home 5Ghz is not present. But i could access the router settings from cable & 2.4Ghz. Neither phone, laptop or USB Wifi is able to detect 5Ghz.

So i did a Wifi survey and found there are a lot more Wifi 5ghz around my neighbourhood compared to only 3 last time. There are about 7 now.

I just adjusted the frequency manually IN ROUTER instead of AUTO. And all my wifi 5Ghz capable devices are able to see the 5Ghz SSID and get connection again.

- ASUS & TPLINK Routers have good firmware support. So you have to try updating to the latest firmware and see if it solves your problem.

- Some TP Link Router/ Mesh has Signal optimization built in. Run it one time and it solves the connection issues..

- Do not stack your router/ Mesh on top of another BTU or router or TV Box or any heat emitting device. The router performance will definitely be problematic.