Cannot upload to 2 Arduino UNO anymore

Hi,

I cannot upload to two of my Arduino Uno anymore.

This happened after I accidentally uploaded a sketch with board: Arduino Mega 2560 selected. After this both the Arduino UNO won't accept any new sketches.

The error I am getting:

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x85

  • I tried 3 different pc's and 1 mac. All of them give the same error.
  • I tried to reflash the bootloader. The reflashing works without any errors but the problem remains.
  • The led on pin 13 is constantly on together with the power led.

What can I do or should I just trow them away and buy new ones?

(deleted)

Are they genuine and not clones ?

Going to guess you also tried other USB cables too ?

And if on so many machines it is unlikely that you used USB 3.0 on them all ?

If they are clones the cost is minimal to replace.

spycatcher2k:
Hi - You seem to have tried everything - if your Europe based and willing to pay postage to Scotland, I can test & sometimes repair UNOs. I would only charge for parts used.

Thank you for the offer. I really appreciate it, but the postage costs alone would be more then they have costed in total.

Ballscrewbob:
Are they genuine and not clones ?

Going to guess you also tried other USB cables too ?

And if on so many machines it is unlikely that you used USB 3.0 on them all ?

If they are clones the cost is minimal to replace.

Indeed I have tried those options. It's unrelated to my usb ports or usb cable. Yes the costs of replacing them is not the issue. I hoped that there was another option I could try, but I guess I just have to replace them.

Thank you both for your posts.

“What can I do or should I just trow them away and buy new ones?”

Did you try using “Sketch/Upload Using Programmer” to load a sketch?

spycatcher2k:
Hi - You seem to have tried everything - if your Europe based and willing to pay postage to Scotland, I can test & sometimes repair UNOs. I would only charge for parts used.

Do you think that if I replace the Atmega328p chip I could get my board alive again?

kprims:
"What can I do or should I just trow them away and buy new ones?"

Did you try using "Sketch/Upload Using Programmer" to load a sketch?

Just tried it but I am getting the same error.

Replacing the 328P has on occasion brought boards back to life but there is mixed success rates as many other posts would show.
Depends if its the 328 that is actually broken or the 8u2 (or whatever they use)

Ballscrewbob:
Replacing the 328P has on occasion brought boards back to life but there is mixed success rates as many other posts would show.
Depends if its the 328 that is actually broken or the 8u2 (or whatever they use)

I understand. I ordered 2pcs of the 328p and I will just try it.