have a mariko here where the pins in the usb port was bend badly/alot pins touching one another. removed port. m92t36 was shorted and is removed. 3,3v rail is shorted so i removed pi3usb but the short is still present on 3.3v rail. in such case i inject voltage and always something gets visible hot under thermal cam. but in this case nothing gets hot. 1v 4a i tried. any idea what i could try next?