nothing is connected at the moment .
I 'm afraid that something was wrong when ( yeserday ) I plugged a different power supply ( 12V ) instead of the usual USB cable .
also I might do a short because it was sitting on metallic case
but now the gren led is on ..so it should be ok , isn't it?
thank's
fab
It does sound like you've fried something ... probably the processor.
Regarding the LED ... it's difficult to say if the green LED being lit is normal because you haven't indicated which board you're using. My suspicion is that the green LED indicates the board has power which tells you nothing about the state of the processor.