Hello all,

I have a 2-axis simpleBGC GUI gimbal.
In the past it worked fine but now (after a long time without using it) it doesn't work:
At first it seemed to move the motors but now it just lights (as if it were permanently in calibration mode: red is steady and green is flashing slowly) and does nothing else.

I have tried to connect it on the PC (with SimpleBGC_GUI_2_40 version) the but it never connects, it remains all time in "connecting to COM7 .."
I have also tried to update de firmware but I have no response from the board. I get the following communication error message: "Failed to upload: Error writing firmware: [1] avrdude: stk500_getsync(): not in sync: resp=0x00"

Do you know how I can solve it?
Thanks in advance!