No communication with computer

[mjordan]

I attempted to connect the Arduino Uno to my computer (Windows 7 64-bit Ultimate) via USB, but there appears to be no communication between the computer and the Arduino. I cannot get to the point where I can install a driver, because the computer does not notice a new hardware connection; nothing new shows up in Device Manager, and the appropriate COM port does not show up in the Arduino IDE.

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

Through the googles I have found others suggesting a reset of the 8U2 firmware (via these instructions) but that seems a bit invasive for a brand new board.

Is this a common thing?

[adafruit_support_bill]

It sounds like the main microprocessor is alive, but the 8U2 is unresponsive. The firmware reset is worth a shot if you want to try it.
Was this board purchased from Adafruit?

[mjordan]

Thanks for the advice!

I followed the instructions to put the 8U2 chip in DFU mode, but it still seemed unresponsive, as the computer still did not indicate a connection, and Flip was unable to connect to it.

Yes, I purchased the Uno from Adafruit as part of the Arduino Uno Starter Pack.

[adafruit_support_bill]

Contact support@adafruit.com about a replacement and link to this thread in your message.

[mjordan]

Thanks a lot for all your help! I have emailed support. Despite the issue with the board itself, I really love the stuff that comes with the kit, thanks for putting such a thing together!