Open USB burning tool - load the firmware and press start.
Then try different combinations like first SC - connect usb - connect power supply. Doesn't work?Next combination connect usb - SC - connect PS. Doesn't work try another combination
Take note, after each try you need to remove SC- unplug usb and power before you try the next combination.
When you short circuit you keep it short circuited.
I'm sure you will get it to work
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