Trouble with my pinebook

[pfeerick]

Yes but it does not boot, I can't replace a part of the kernel.
I have to learn C and partitioning...on my Windows PC.
Thank you for your precious help.

But you will be able to boot from a microSD card if you can download and write it on another machine (SD boots before eMMC on pinebook).

You may be able to 'simply' boot from a microSD with the same or similar image to which you had on the pinebooks eMMC, and once it's booted, copy the kernel and Image files across from the microSD /boot partition to the eMMC /boot partition.

I strongly doubt any hardware is damaged, and it should be possible to recover the system by replacing that kernel. However, I don't know what other problems that might arise due to broken package repo etc is another problems, etc. That's for someone else more knowledgeable to comment on