I have just bought Mi Box (Android TV 6.0) and here is the huge dissapointment: I have a DSL router upstairs. Downstairs, there is an WRP-300 device, connected by cable as an Access Point - it spreads the signal of the router. Every single device (laptops, mobiles) have no problem to see Access Point's WiFi and have full range connection. However, Mi Box can see ONLY upstairs router and no WiFi from AP. It connects properly to the router, but of course the connection is very bad, since it is 15 meters away. Can I do something about it? Why every device can see AP WiFi and Mi Box cannot?
As you saying your mi box not showing wifi at all, have you made the ssid hidden on the access point (Repeater).. Here my mi box is able to see all wifi even 5 ghz wifi too.. Also try adding access point wifi manually.. I think it should solve it.