I changed the + and - polarity at SimpleBGC32 board. I have disconnected power in 1/4 second (really fast).
The board made ​​a sound like a "tap". The board has no piezo - the sound came from some electrical components.

When the board re-connect properly (right polarity), LEDs are off and the board seems burned - inactive.

When I connect it via USB, the LED lights up and the board is communicating normally (software connects, I see values).

I thought that the board has a: "Reverse-polarity protection, overheat and overcurrent protection"... :-( but I know that it's my fault ..

Can anyone advise me?

Can I claim this?

Or just on the board to replace some parts and will it work?

Is there somewhere board diagram?

Thank you for any help. It is the second board I burned :-( I do not have the money to buy another ... I'm really unhappy ..