Clara HD SD card empty after failed start

[kobofails]

Hi,

I've searched existing threads but I didn't find any similar fail on Kobo Clara HD reported on the forum.
After a failed start, SD card was erased on my ereader. The ereader doesn't start now and I always have the 3 dots screen. Even after charging the battery at full capacity.
I have tried all the resest procedures provided by Kobo on their official website in vain.
Now when I connect the SD card on my desktop computer through an adaptator I don't have the .kobo directory. See screenshot. When I try to repair the SD card on disk utility (I use Macos), the process goes well but I still can't start the ereader.
How can I fix the SD card and start again the ereader ?
I have talked to Kobo and they don't do any maintenance on their ereaders. They only propose me to buy a new one... (no comment).
The screen is perfect and I don't have the intention to buy another one.
I've read some articles on other websites where the process seemed to be always related with the .kobo directory, which I don't have anymore on the SD card. So I'm stucked.

Thanks in advance for your help.

[DNSB]

I've sent a PM with the link to an image of a Clara HD µSD card. You will have to use Balena Etcher or similar to write the image using a Mac. I don't own a Mac so any help I can offer is limited. Please note I recommend writing the image to a new µSD card. One item that I'm not certain on is that while you would be seeing 3 partitions on the µSD card when you connect it directly to a Linux box but I'm not certain if a Mac will see the 2 ext4 partitions.

[kobofails]

Originally Posted by DNSB

I've sent a PM with the link to an image of a Clara HD µSD card. You will have to use Balena Etcher or similar to write the image using a Mac. I don't own a Mac so any help I can offer is limited. Please note I recommend writing the image to a new µSD card. One item that I'm not certain on is that while you would be seeing 3 partitions on the µSD card when you connect it directly to a Linux box but I'm not certain if a Mac will see the 2 ext4 partitions.

Thanks a lot! I will try to do it on another SD card.

[kobofails]

Hi,
I've done the following :
- Begin to clone the old sd car with balena etcher on a USB drive -> it failed 2 times
- Install the .img file with balena etcher on a new sd car -> Success
- Put the new sd card in the kobo ereader -> Success
- Close the ereader and try to start -> Fail, nothing happens
- Plug it with usb on Macos -> Fail nothing happens
Any help will be apreciated.
Bye.