i was working on a project and was just uploading a new version of my sketch.
After that: (1) Windows (7, 64) does not recognized the board anymore (2) Arduino does not showed the com port (3) Both LEDs yellow and green are all the time constantly light up
I've tried: (1) reinstall and install Arduino IDE (2) try to upload the sketch at another Computer, but same problem (3) reset the board as soon "uploading" appears
The last think worked for uploading and recognizing the board again. But the LED appears lighted up.
(4) uploaded the blink sketch (with and without reset at "uploading") but it didn't help
There is no wiring, just the USB-Cable.
Do someone habe an idea?