Do the two lights stay on? That happens when the board has entered bootloader mode but the PC hasn't managed to make a USB connection to it
In the case I'd try restarting your computer (maybe somehow it got confused), and then check to see if under 'Device Manager' (if in windows) you have any errors. It may be it's complaining about the driver not being installed.
If you're using a USB extension lead it may also be that the extension lead is a bit flaky.
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Hi Nicolas,
Do the two lights stay on? That happens when the board has entered bootloader mode but the PC hasn't managed to make a USB connection to it
In the case I'd try restarting your computer (maybe somehow it got confused), and then check to see if under 'Device Manager' (if in windows) you have any errors. It may be it's complaining about the driver not being installed.
If you're using a USB extension lead it may also be that the extension lead is a bit flaky.