Hi, I'm trying to fix a gimbal from friend of mine, the model is Fosicam Fm1-45, I alredy tried to reach the productor but with no luck (no response to email or social). I think he tried to flash the wrong firmware and now it is impossibile to turn on the gimbal properly and connect to the GUI (SimpleBGC). Computer seems to recognize it through USB cable and it seems that manual flash could work but a message about bootloader appear in the window (image in the gallery). I found that I need to close the jumpers in the motherboard, but I can't find the jumpers. Can you please help me? In the gallery I added photos from the boards. The black board is the USB connection, the blue board has the joystick, menu, home, power and it should be the main board.

Thanks to anyone who can help me!
Gallery: https://imgur.com/a/ZIzJrAj