I have inherited a project from another designer and the Nano 33 BLE which I received isn't responsive. When I plug in the USB cable the Nano has power; I measure 3.3V on pin 2 and 4.5V on pin 15, and the RGB LED is on. However the ON LED is not on and the L LED is not on, I checked both of these LEDs by applying 3.3V to them and they both work. When I use the RST button nothing happens; the board doesn't power off and double-pressing doesn't put the board into bootloader mode. And most importantly my Win10 PC doesn't recognize the Nano, it doesn't show up in COM ports.
Thanks for the reply. I have everything setup appropriately, because I have a 2nd Nano 33 BLE that works fine. So it is something specific to the device in question and not my PC setup. The more I have been reading, I am picking up vibes that it could be something with the bootloader. I have a CMSIS-DAP device on order to see if I can flash the bootloader using that.