Join a community forum for your specific device (e.g., Orange Pi forum, XDA-Developers for TV boxes). Many devices have hidden "reset to bootloader" key combos (e.g., holding Volume+ while plugging USB) that aren't in the official documentation.
Don't give up. Once you hear that Windows USB connect sound and see turn green, the satisfaction is immense. You have conquered the Rockchip connection ritual.
You plug in your device, launch the software, and... silence. The screen remains empty. The device is invisible to your computer.
Rockchip based devices (such as the Orange Pi, Radxa Rock, various TV boxes, Chromebooks, and industrial ARM boards) offer incredible flexibility for tinkering. However, the first major roadblock most users hit when trying to flash firmware is the dreaded "No Devices Found" message in RKDevTool (or AndroidTool).
Start with the DriverAssitant re-installation and the Zadig WinUSB swap. If that fails, short the Mask ROM pins. If even Mask ROM remains invisible, your USB-to-Serial adapter will reveal whether the CPU is alive or dead.

No me gusta Huawei, ya que no contempla todas las app de play store y estoy teniendo dificultades.
Buenas no le han servido los consejos de este post, al final es un fastidio no tener Play Store.
Dinos si podemos ayudarte, un saludo MovilOff
A mí me está costando instalar la app Play Store en un movil Huawei que la tenia…
Buenas,
En el caso de los Huawei que la tenían no suele afectarle a no ser que se actualice, nuestra recomendación es que pruebe a dejarlo de fábrica y así mantenga la aplicación.
Esperemos que le ayude