I played for the hole day with my Lilypad USB, and out of the blue it stopped working.
The port in the arduino IDE is gray (even if i am running as an admin). The device is no more shown the /dev/ or in the device manager for window.
In windows when i plug the device is and push the reset button twice i can see the device under other devices but after a few second the device disappears.
How can i resolve this matter? Is there another hardware factory reset method?
Is the Lilypad broken?
Please help.
hiduino answer from here helped
http://forum.arduino.cc/index.php?topic=153674.0;wap2