: The serial chip on either the computer or the receiver board has experienced a buffer overflow because data pins are improperly configured, causing data to pool rather than process. Root Causes of the Buffer Stalled Error

Are you using a specific downloader tool like or MTK Flash , and do you have a multimeter to check your cable's continuity?

Make sure the GND pin of the USB-to-UART adapter is connected to the GND pin of the STB.

To understand the issue, we must dissect the specific terminology used:

: Verify that you have selected the correct COM port in your software's settings.

The system is prompting you to verify the physical serial connection (Universal Asynchronous Receiver-Transmitter).

Firmware tools often require you to click in the software before plugging in the STB power. Step-by-step : Close the tool →right arrow Unplug the STB →right arrow Click "Start" in the tool →right arrow