Thanks for your response !
Well, I’ve ordered a new blank ATMEGA328P, I’ll receive it next week.
There’s a IC socket for it on my Arduberry, so no need to desold.
I’m a little confused about the “fuse”. I’ve found some informations on this site :
But it’s still a little unclear for me. Do you know where I could find more precise directions about what to do for burning fuse(s) ? Do I have to build some specific electronic assembly for that ? I’m going to read Atmel specs for trying to better understand this.
Many thanks by advance.