Enter recovery mode. While powering on, rapidly press the reset button inside the AV hole using a toothpick. Wipe cache and factory reset. If that fails, reflash.
If your box works fine except for a slow interface , do not flash firmware. Instead, simply use it as-is or install a lightweight launcher like Wolf Launcher. firmware tv box mxq pro 4k 5g placa h3q44-v3.0
While holding the button, plug the other end of the USB cable into the (usually the one closest to the SD card slot). 3. Flash the Firmware Enter recovery mode
While holding the button, plug the other end of the USB cable into (the one furthest from the others/at the back). Enter recovery mode. While powering on