I used this guide to downgradr my amazon kindle 10th generation to version 5.12.5:
https://kindlemodding.gitbook.io/kin...indle-firmware
The downgrade was succesful but now my kindle shows a white screen. It shows the screensaver when I press the power button and also the reboot menu when long pressing the power button. I tried rebooting, but it didn't help. I also tried long pressing the power button to force a reboot, but it didn't help either. Is there any way to save my kindle or do I have to throw it away?