Once the tool displays a green message, unplug the USB cable and connect the MX9 to your television using an HDMI cable. Plug in the power adapter. The first boot after a flash can take up to 10 minutes as Android builds its initial system cache. Troubleshooting Common Issues
If your device is stuck on the Android logo or the MX9 boot screen, flashing the firmware completely overwrites the corrupted system files causing the loop.
The tool should show a blue or green box, indicating a connected device. Flash: Click "Upgrade" or "Restore" in the software. firmware tv box mx9 4k android 7.1.2
In FactoryTool, ensure the flashing mode is set to (to keep data) or Restore (for a clean, complete wipe). Restore is highly recommended for fixing system bugs.
Plug the other end into the specific of the TV Box (ports vary by board design). Once the tool displays a green message, unplug
Ensure you are holding down the AV button before and during the USB insertion. Try switching to a different USB port on your PC (prefer USB 2.0 ports over USB 3.0 ports on older machines).
Wait until the software displays a successful message in green text (e.g., "Restore Success" ). Unplug the USB cable from your PC. First Boot After Upgrading Troubleshooting Common Issues If your device is stuck
Monitor the progress percentage bar. Do not disturb the cable connection during this phase.
Once the device connection indicator lights up, you are ready to rewrite the storage partitions: