Open a terminal (like Putty) and type; if the characters appear on the screen (echo), the adapter and drivers are working correctly. If you'd like, let me know: The of your set-top box.

A floating ground, long unshielded wires, or nearby switching power supplies inject noise. The UART sees phantom start bits, fills the buffer with nonsense, and triggers the error.

If software fixes fail, the issue may be a hardware "overrun," where the receiver buffer is full and cannot process more data.

The BootROM expects data at a very specific speed (often 115200, 9600, or sometimes a strange one like 74880 for certain chips). If your PC is sending at 115200 and the box is listening at 9600, the data becomes unreadable "noise" that fills up the buffer without triggering a successful "get". 2. Faulty RX/TX Wiring

If the above fails:

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