| Problem | Cause | Fix | |---------|-------|-----| | “No response from target” | Wrong UART pins (TX/RX swapped) | Swap TX/RX, check GND | | “CRC mismatch after write” | Bad cable or too high baud rate | Lower to 115200, shorten wires | | “Timeout during handshake” | Bootloader not waiting | Press reset button right after clicking “Connect” | | “Erase failed” | NAND bad blocks | Use “Skip bad blocks” option (v1.032 has it) |
Crucial: Do NOT power the adapter’s VCC pin to the STB’s VCC unless you know the voltage level (3.3V vs 5V). Most GX6605S use 3.3V logic. Many adapters can be set to 3.3V. gxdownloader boot v1.032 gx6605s
Connections:
Even with the correct setup, users encounter issues. Here are solutions for frequent problems in GXDownloader Boot v1.032: | Problem | Cause | Fix | |---------|-------|-----|
| Error Message / Symptom | Likely Cause | Solution |
|------------------------|--------------|----------|
| Cannot open COM port | Tool already using port or driver issue | Close other serial apps. Reinstall USB-to-TTL driver. Try a different USB port. |
| No response from target | Wrong baud rate, incorrect pin connection, or boot mode not triggered | Double-check RX/TX crossover. Verify boot pin shorting method. Lower baud rate to 9600. |
| Download failed at 0x00000400 | Bad block in NAND or mismatched bootloader | Use “Skip Bad Blocks” option. Load manufacturer’s original bootloader first. |
| Error: File too large | Firmware exceeds flash memory | Use a partition-specific flash (only write system/user partitions, not full dump). |
| PC freezes or tool crashes | Incompatible Windows version or corrupted v1.032 build | Run in Windows 7 Compatibility Mode. Obtain a fresh copy of v1.032 from a trusted source. | Crucial: Do NOT power the adapter’s VCC pin