Geeetech

a gift is something that you do not pay and therefore since you ask me bought a half price this is not a gift but a sale. and what is it half price?
I get a Mega2560 totally unusable and I have to pay more to me that the exchange? I had not chosen the first prize for being quiet but instead I get a ...

SO you offered to send me a "atmega 16u2" welded to myself then that is what a Mega2560 you proposed to send me? if another Mega2560 I agree but I know the 3d printer but I'm not equipped to weld a atmega16u2 safely. I do not see why I should pay half of something I received unusable.

Should I contact the service after sale to request an exchange of mega 2560?
thanks

hello,
I already tried to reboot the "16u2 IC" with a usbasp and the transferring is ok but no improvement observed.
still no detection by the pc

hello,
my iduino mega 2560 has never been detected by my pc and not by that of my friends. Yet this is not a problem of drivers because I have tested with another card mega 2560 and is recognized and functional.
So I can use the uploaded and a programe.
I think after having scanned the web on all ...