If the Xiaomi Wi-Fi Range Extender AX1500 can't connect to the 5 GHz Wi-Fi, please refer to the following troubleshooting steps:
1. Please access the router management interface and manually adjust the 5 GHz channel to a commonly used channel, such as 36/40/44/48, before connecting.
2. It is recommended that you switch the encryption method of the 5 GHz Wi-Fi to WPA2 for better compatibility.
3. It is recommended that you place the Wi-Fi range extender close to the main router for initial pairing. After successful pairing, move it to a suitable position.
4. Please enable the Wi-Fi 5 GHz compatibility mode and try again.
5. It is recommended that you check the available firmware update of the Wi-Fi range extender and update it to the latest version before connecting.
6. If the Xiaomi Wi-Fi Range Extender AX1500 still can't connect to the 5 GHz Wi-Fi after the above troubleshooting steps, please apply for a professional after-sales inspection.