[xembu]

Thanks for replying!

A new card. I don't know why you are doing this, but, if there were problems before, it could be a failing card.

Card shouldn't be a problem I think, because I'm using the same card for the old image as well, and with the old image everything works as it should.
The reason I'm doing is just to verify that the new image I've made is correct. I didn't create the old image (which works) myself, I've got it from here when my SD card went funny last year. We have bought a new one a few weeks ago and I taught it can be handy to have a pristine backup from a more recent device. And now I wanted to verify on my old device that the backup is working.

Use the image without changing the serial number. It will be safe to reuse at least while you prove the process.

I've already tried this, but no success.

Charge the device. Don't assume the charge level is what it was when you last used it.

I've tried this as well. But anyway it works well with the old image restored, so charging level can't be a problem either.

Do a manual factory reset according to the instructions on https://help.kobo.com/hc/en-us/artic...or-Kobo-Elipsa.

This doesn't work, tried to do it many times, but I think it already stops working before the factory reset procedure could kick in.

Other than that, what actually happens when you use the image? Does the power light come on? The screen change? The front-light do anything? The last suggestion above won't do anything if the device does not start at all, but, it can solve problems after an image is used.

The power light comes on for a few seconds (2-3sec), and then it goes off. The screen doesn't change at all, no front light either. If the USB is plugged in (PC <=> Clara), the power lights up for 2-3 sec, then pushing power button again and it lights up for 6 sec, pushing the power button long lights up for about 15sec and then again, nothing happens...


I've seen on the wiki (https://wiki.mobileread.com/wiki/Kobo_Firmware_Releases) that some devices can have different hardware versions. Can it be the case with the ClaraHD as well? Maybe the newer Clara is Mark8 instead of Mark7.