While holding that button down, connect the USB A-to-A cable from your PC to the (usually the one closest to the power jack).
: Many users end up in "Maskrom mode," a terrifying state where the device appears dead after a failed flash, only to be resurrected by shorting pins on the motherboard. The Hardware Tug-of-War : Developers have managed to port ---- Rk3229 Android 10 Firmware
If you want, I can: