Samsung S20FE SHORT when I plug usb-c câble

I have Samsung s20 FE
HE work good but don’t charge
When I plug usb-c cable thé ampèremètre say ( short circuit )
I change flex usb-c and cable
But not fix
I try to see on motherboard but I don’t know how to find the good solution
Do you have idea ? Thanks you

Sorry for my bad English iam French