HELP unbrick Kindle Paperwhite 1 - NO USB

I was given an old Kindle paperwhite 1st gen with 3G, in which the screen was stuck to the boy reading under the tree.

Charged the battery for a very long period of time (24h) on the wall charger with the led on amber and tried powering it on with it connection to the pc running linux.

With constant monitoring of the logs it was obvious that no storage device was found.

I eventually dissasembled the device and soldered the pinouts for the usb and was able to get the boot message. with kernel checksum errors.

Got into uboot->bist
run fastboot on the kpw1

Got the system images from http://ixtab.tk/kindle-touch-images/...pw520_wlan+3g/ (Thanks by the way) and ran the fastboot commands from the pc.

extracted the files then ran

fastboot flash kernel main_kernel.img.gz

after rebooting i was able to get the diag menu.

Exporting USB storage now shows up the Kindle storage. I copy over the extracted pw_3g_5.2.0-mmcblk0p1.img.gz then drop to the login prompt.

I Cannot get root access...
Copied the serial number to the Amazon Kindle root password site https://www.sven.de/kindle/ (Also thanks for providing the service) but the resulting passwords do not work.

So, I can't dd the mmcblk0p1.img without root access.

Following the instruction here https://gist.github.com/TobiasWooldr...ca75190b9a473f which recomends

modifying the mmcblk0p2.img diags partition and editing a upstart script for automatically dd the file does not and the fastboot flashing the file to the diags partition does not work.

Would really appreciate some pointer....

Thanks.