Before proceeding, verify your device matches these specs. If your device has a different chip (like S905W or S905X4), and do not use H313 firmware.
H3Q44V30 (Verify by opening the case; it is usually printed in white on the PCB). firmware tv box mxq pro 4k 5g placa h3q44v30 better
Use a toothpick to inside the AV port .