The phone only vibrates when connected to the charger. phone: Samsung Galaxy M12.?

Question

Electronics

A short background - there was a short circuit in the charging socket, I changed the bottom board. Help me please.
In the manager through the PC I see now - ADB Interface, in the portable devices item "M12", at the ports (COM and LPT) "Device with USB serial interface (COM4).

Answer 1

if the computer sees = it means the brains are alive
if you are not special = better not go in, buy a new one / pay for repairs
I am an electronics engineer with 30 years of experience, I don’t stick my nose
there without a microscope, there’s no way to do it, but in 99% it makes no sense = repairs will be more expensive new