Arduino Leonardo USB Not Recognized
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Arduino Leonardo USB Not Recognized

by littleruler20 on Mon Nov 05, 2012 7:37 pm

I purchased a Arduino Leonardo a week ago and have been unable to use it period. Out of the box, I followed the instructions to the letter on the arduino site.
The problem:
When I plug my arduino in, It is recognized for a couple of seconds and then disappears. In device manager it goes from Arduino Leonardo to USB not recognized. I am running windows 7 32 bit, but I have also tried to run it on Ubuntu. It seemed to be recognized on ubuntu, but when I opened up the arduino terminal, The option serial port was greyed out.

TLDR:
Wndows 7 32 Bit foes not recognize the usb, but it does recognize for a few second after I press reset/plug it in
Ubuntu seems to recognize it as an Arduino Leonardo, but Serial Port is greyed out

The L and T light are on
The arduino seemed to be recognized after initial install, until I attempted to upload blink. I am not sure if that was the cause because I tried to upload fairly quick and maybe the problem happened at the same time I tired to upload.

This is my first post so please give me tips if I did not give enough/ the correct information.
PS I have seen this fix
viewtopic.php?f=25&t=31721&p=158426&hilit=usb+not+recognized#p158426
and am pretty sure they are different problems because my Rx light is not on and I used an example program
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Re: Arduino Leonardo USB Not Recognized

by adafruit_support_bill on Tue Nov 06, 2012 6:01 am

When I plug my arduino in, It is recognized for a couple of seconds and then disappears.

Sounds like a bad cable.
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Re: Arduino Leonardo USB Not Recognized

by littleruler20 on Tue Nov 06, 2012 8:47 pm

Thanks for the reply.
I thought this as well, so I tested the arduino with a different wire. I had the same problem.
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Re: Arduino Leonardo USB Not Recognized

by adafruit_support_bill on Wed Nov 07, 2012 5:42 am

That is an odd case. Clearly the processor is functioning well enough to identify itself as a a USB device. Leonardos are simpler than Unos since the USB capability is in the main processor. It sounds like you have tried all the usual things: different computer/OS/cable. Contact support@adafruit.com with a link to this thread to arrange for a replacement.
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Re: Arduino Leonardo USB Not Recognized

by littleruler20 on Thu Nov 08, 2012 2:37 am

Thanks will do.
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