1. Insert the USB cable into PC, run USB_Burning_Tool software, select importing the *.img file, and click Start.
2. Clean the chip pins marked on the motherboard.
3. Short-circuit 2 of them (probably 4th and 5th pins). At the same time insert the USB into the USB3.0 interface.
If the short circuit is correct, your PC will immediately discover the device and start flashing the machine when the USB cable is plugged in. Otherwise, re-select the shorting point and plug in the USB.
Enjoy
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