Accidentally choosing wrong programmer on arduino UNO.

Dear all
I have problem with arduino UNO.
I've accidentally chose wrong programmer while I've wanted to upload " arduino as ISP " sketch.
I chose " arduino as ISP " programmer and not " AVRISP mkII ".
Now when I want to upload any sketch, it never stops loading it. The TX light is on all the time, the RX is off

I've replaced te original atmega 328 with new atmega 328 from store, and now it uploads sketch but there's an error that says " not in sync " .
Why do you think this is happening ? Did I kill the bootloader on original amtega 328 ? Or did I corrupted the atmega that is responsible for USB -> Serial communicaton ?

It could be the bootloader, I guess 60% chance it is the bootloader.

Do you have a programmer, or a good Arduino (to be used as Arduino as ISP) ?
You need to try to re-write the bootloaders.

When you buy an Arduino-with-bootloader, you don't know if that bootloader is any good. You need to re-write it anyway.

I’ve replaced te original atmega 328 with new atmega 328 from store, and now it uploads sketch but there’s an error that says " not in sync " .

Sorry, I don’t understand. Is it able to upload sketch or there is an error " not in sync "? Has the new chip a bootloader or it was raw one?

Thanks all for replies.

Sorry, I don't understand. Is it able to upload sketch or there is an error " not in sync "? Has the new chip a bootloader or it was raw one?

It was a raw chip that I once bought. I've burned bootloader on it but it doesn't seem to work. But now I've done it, don't know how, but arduino is fully operational on this new atmega 328. Looks like I've burned bootloader correctly.

But the original atmega from arduino still doesn't work. But im almost sure that it is bootloader, now when I have arduino with this new chip i can re program the original one.

btw. here's screenshot of this original atmega that i've broken.

UPDATE: It's all working ok, after re burning bootloader, thanks for help, maybe this topic will help someone

Well done. :stuck_out_tongue: