I’ve just received my uno rev3 and began playing with it. I’ve been able to connect it to my computer (linux mint), but the first upload (blink sketch) failed. Apparently because the (only) serial port selected was not the right one (some FTDI driver issue it seems).
Anyway, I left it plugged for some time, and I noticed at some point the power led was off. Now when I plug it again the power led does not switches on. Does that mean it is broken? Is that something that can be fixed? I used a USB 3 port, can that explain it?