I've been using my Uno R3 with a ATmega328. Today it just died so I thought it just needed a reset or something. Unfortunately it is no longer recognised IDE and so I look online as to how to fix it. I went through all the instructions http://forum.arduino.cc/index.php/topic,92148.0.html which was incredibly painful but at the end it seems that the micro controller still isn't supported and the only error message I get is
dfu-programmer: no device present
The power / L light turns on and flashes and it responds to the shorting of the two pins nearest the USB port but other than that theres no life. Is this thing broken now after only a month use?