Solution:
For Infrared remote control: After the TV is turned off, press and hold the home button + menu key at the same time, and hold the remote control at the key position of the TV, and then press the TV’s power key until it enters Recovery mode and then let go;
For Bluetooth remote control: Turn off TV and wait for 10 seconds. Turn on TV & press ‘Mi’ and ‘O’ key simultaneously on the remote control after 10 seconds.
Wait for Mi logo to appear then release the pressed keys. TV will open on Recovery mode.