Hi guys, how are you? So I ended up buying a "MXQ 4K" device, but the same came with Android 6.0.1, and because my TV was old, I needed the screen settings that I would only have in the previous versions, until then I had tried to perform the outdated card SD, without success until then, I still continued using with the screen in black and white, but the android began to present some errors, it was then that I decided to upgrade by Rockchip Batch Tool, I looked for several tutorials on youtube and I followed step by step, The device "died", Windows recognizes and installs the rockusb drive, but when I tell the software to perform a new installation of the system it error in the "Test Device Fail". Good to understand better follows below the software screens and photos of the device and logs. Please help me!!!