I have tried multiple USB cables on multiple USB ports, and I have also tried it with my Macbook Pro to no avail.
When plugging in the USB, the "On" LED lights, and the on-board LED blinks, as per the default sketch. Just no communication with the computer.
I have consulted these instructions, but nothing has seemed to solve my problem so far:
- http://www.arduino.cc/en/Guide/Troubleshooting#upload
- http://www.ladyada.net/learn/arduino/lesson0.html
Is this a common thing?