Hello, I would like to know if any of you have had this problem, my board is not recognized by the PC, I have tried many cables and installing the correct drivers without success, I have been reading in many posts that it may be a problem with the 3.3v regulator since when I connect the board only the leds (usb and 5v) turn on but the 3.3v led stays off, I measured the resistance of the regulator and I get 0, no component gets hot and there is no apparent damage, any advice on how to solve it this bug?