Hi, I tried everything I found on the net but still stuck so I need your knowledge. When I try to upload a sketch the upload is verry long and finished with the error timeout contacting programmer. The Rx blink maybe one or two, but not more. When i try to communicate with the sketch that's supposed to be in place (before the issue) it doesn't work... I have to say that when plugged in the pc, it imediatly recognized as an arduino mega 2560 in com# I tried to uninstal reinstal drivers... nothing changed.
I have an arduino mega 2560 labelled R3 but with the atmega8u2.... so strange according to what I read... I tried to rewrite different versions of the atmega8u2 firmware "Arduino-usbserial-mega.hex" with flip...nothing changed.
No I hope somebody have other ideas... Thanks a lot for any help you can bring!