Geeetech

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 forums as possible and I think that has atmega16u2'll defective.
What do you think and review material default or other solution?

bonjour, mon iduino mega 2560 n'a jamais été detecté par mon pc et non plus par celui de mon amis. pourtant ce n'est pas un probleme de drivers parceque j'ai testé avec une autre carte mega 2560 et elle est reconnu et fonctionnelle.
Donc je ne peux l'utilisé et televersé un programe.
je pense apres avoir scruté le web sur tous les forums possible et je pense a l'atmega16u2 qui serai defectueux.
Qu'en pensez vous et a votre avis defaut materiel ou autre solution?

There are several possible if mega2560 can't find the device,
1.Did not install the driver;
2.USB poor contact or USB failure;
3.The board failure,Including the USB and 16u2 Or other.
If you make sure step 1 and 2 is good,then you can contact customer service.
Good luck!

Dear user djkiller942000,
I'm writing to apologize for the delay in this case, I reviewed your problem description again after our team meeting, and based on your information, I think you are right, there might be a atmega16u2 problem, as you know this issue maybe caused by a lots of facts, like shippment, static etc....
But sometimes it can be solved by re-boot the firmware, So I suggest you try to re-boot the 16U2 IC(which means reset it).
Please kindly try this, and let me know the result,

If you have any further question, do not hesitate to contact us.
Thanks,

Tech Support Team.

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

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

Hello ,friend
Sorry for letting you wait so long time.Our engineers have reached an agreement that there are some problems in the 16U2 IC of mega2560 you received.It's not a good idea you send back the mega2560 considering the express fee and wasting time.And we know it's important for you to have a efficient solution.Every stop will influnce your project directly ,which we had experienced ourselves .
Here are the solutions we can decide together. we'd like to resend you the atmega16u2 ASAP.Or Would you like to buy a new board in half price from us ,We can see from your message that you are an honorale 3D printer fan with professional knowledge and indepedent thinking.So we believe you can handle it when you get a new atmega16u2.But this will take you some time .Every coin has two sides, it's up to you .Which do you prfer us to do ?
Looking forward to your reply.

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.

Dear friend,
Ok ,we can understand .Would you like to buy a new one in half price ？About the mega2560 you received ,it's a little gift for your project. Some parts of it may be helpful one day. Looking forward to your reply .Best regards!

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 defective part and we propose to discuss in by buying another (even half price I think it's unfair) I thought being in business with honest people selling quality but I can be wrong?

I am having the same issue with a iduino mega 2560 that I received earlier this week; reconnected many times with two different USB cables, updated drivers, and gone through all windows troubleshooting options. The atmel 16u2 was dead on arrival, although nothing looks out of order.
The last arduino copies that I bought from geeetech (about one year ago) were made with counterfeit usb to serial converter chips, and were bricked by a driver update from the original manufacturer in October. I had to replace them at a cost of ~4 USD each.
Please tell me there is a fix for the Mega, or this may be my last dealings with geeetech.