Cannot get USB Serial working on STM32F407 Discovery board

[LAPSyLAB]

[fpistm]

Hi @robroz
Some more information would be useful. Core version, Arduino IDE version, which options are used,...

I've tested the disco F407 and USB CDC works fine.

Did you enabled the USB support in the"Tools" menu ?
If yes check your cable is well connected to the CN5 USB port.