Kindle PW4 is stuck on restarting. Is it dead or have a chance?

[Alkosu]

Hi all, my Kindle seems to be dead. Something happened at night and it has not woken up at morning. It is showing "Your Kindle is restarting" message on the screen and it's not changed after reboot. The log from TTL is:

U-Boot 2016.03 (Feb 19 2020 - 18:42:36 +0000)

CPU: Freescale i.MX6SLL rev1.1 996 MHz (running at 792 MHz)
CPU: Commercial temperature grade (0C to 95C) at 48C
Reset cause: POR
Board: MX6SLL Rex
I2C: ready
DRAM: 512 MiB
read voltage pass, retry=20
MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
idme_initialize
Idme version is 2.x and set related function to V2.x
IDME table version 2.1
hibernation: Not from hibernation
Core : f770ee83 2018/03/16 19:49:02 (Licensed to Amazon Fulfillment Services,Inc..)
SBIOS: v2.0 2022/09/21 17:13:01
TTBR:9fffc059
Platform: v2.0 2022/09/21 17:13:01
fl
*** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
switching back to PMIC user mode
Hardware Board: EVT
Board ID is P091M70293640LX4
WFO module
secure_cpu: 1, production: 1, unlocked: 0
Boot mode is 0
Hit any key to stop autoboot: 0
boota mmc1
boota: trying to boot from partition: kernel
Certificate authenticated
==============
Image Metadata
==============
product:jaeger
signer:CodeSigner
Image FAILED AUTHENTICATION on PRODUCTION device
fl
Enter fastboot mode, use Ctrl+C to exit.


So could you say if it's completely dead or I can give it a chance to debrick?