DYS F4 PRO PROBLEM and RS40A V2 ESC Dead.

Описание: I bought parts for a new dron assembly.
I bought it all from Banggood.
DYS F4 PRO board and RS40A ESC.
However, a problem was found on the DYS F4 PRO board.
The power test suddenly showed smoke and a red light.
The problem was easily identified.
GND and S3 signal terminals are electrically connected to each other.
As a result, the three ESCs also became unrecognizable.
Banggood decided to refund the DYS F4 PRO board, but a refund for the ESC is awaiting an answer.
If you look at the video, you can see that the ESC beep sound is strange.