I suddenly got that Dos-like menu black screen when I start my OTT MXQ Pro 4K Box (Android 5.1) which looks like a problem with firmware. I'm very new to this and I have to do it by myself.
I'll be grateful if you can help me to re-install the right firmeware to this TV Box (Links to download the most updated firmware that works with my TV Box. If you can also describe step by step, the right procedure to flash the firmware again.
Thank you very much