Flashing firmware carries a risk. Always ensure your power supply is stable during the process. If you are unsure of your panel's resolution or the specific board revision, consult a professional technician.
Most versions support up to 1920x1080 (FHD) or 1366x768 (HD). OS: Android (Versions vary, often 7.0 or 9.0). Hk.t.rt2841p631 Firmware
If the screen remains black but you hear sound, the firmware resolution is likely higher/lower than what your panel supports. You will need to flash a version matching your specific panel. Important Safety Warning Flashing firmware carries a risk
Usually named allupgrade_2841.bin or similar. Hk.t.rt2841p631 Firmware