I have 2 Arduino boards. One is working fine but the other has a flashing light next to 'L' and I can't select the correct serial port (/dev/tty.usbmodemfd131) because it doesn't show up in the list and therefore can't upload any sketches. Can anyone help?

/dev/tty.usbmodemfd131

system October 13, 2012, 11:16pm 14

Yes female connectors of a sort!!

Thank you for your help and your time, I will have ago at replacing the 16u2, after all if it's already broken I can't do anymore damage!

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