I have a xioami redmi 1s and until now was very happy with it, but today it has become a black screen and no way to see anything. I have not given any hit nor have I touched anything unusual has happened when I've taken from his pocket, until then I had been running normally. It has charged batteries and reset when removing the battery, I hear as they enter the whatsapp, even when the screen or touch the function keys noted as vibrates, but the screen is black, can not see anything. I tried it with the ignition key volume + and with the volume key - and not see anything. Does anyone know how I can fix it? Thank you.