Press and hold the hidden (usually located inside the AV jack using a toothpick).

While holding the reset button, plug the other end of the USB cable into the correct port on your TV box (often the USB port closest to the Ethernet/Card reader).

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Ensure your TV box is connected to a stable power source. A power failure midway through the flashing process will permanently brick the device.

Complete Guide to Downloading and Installing the R329Q V31 Firmware Update