I just got my Arduino Leonardo from ebay
http://www.ebay.com/itm/280962986469?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Nothing happends then i connect it to the USB port, it's not found in device manager.
On the board 'ON' and 'L' lights up. I tried pressing reset serveral times.