Debrick problem - Diags not starting / Screwed screen

[sclause]

Hello.
Maybe someone has a hint.

I try to repair a K4. Actual status: Man under tree - no progress bar.

I tried to debrick it with Kubrick:
Going to recovery mode - DONE
Going to fastboot mode - DONE
Flashing diags - DONE
Starting to diags - FAIL - Kindle restarts (screen off/on) then again Man under tree.

I tried the steps manually:
Going to recovery mode - DONE
Switching to fastboot mode with imx_usb or MfgTool - DONE
Connecting in fastboot - DONE
Writing diags_kernel - DONE
Writing diags - DONE
Writing main_kernel - DONE
Set diags mode (fastboot setvar bootmode diags) - DONE
Get diags mode (fastboot getvar bootmode) - FAIL - gives "main"
Reboot (fastboot reboot) - FAIL - Kindle restarts (screen off/on) then again Man under tree - no diags mode

I tried with MfgTool and imx_usb to boot diags directly but this does not work too. In this case Kindle restarts (screen off/on) then Screen is screwed up. Upper part is black, lower part is white with some mixed areas in center (looks like a pedestrian walk).


I can do everything again and again. I tried all fastboot stuff with fastboot and fastboot-standalone.

Have you ever had this problem?

Thx.
SClause

[knc1]

Originally Posted by sclause

- - - -
Have you ever had this problem?

Thx.
SClause

Yes - it has been seen before.
Something in the parts of the firmware that is not (normally) touched by Kubrick.

Does your fastboot utility have a way to get the firmware (u-boot/bist aka fastboot) version number?
You may have a version that has a bug in the mode set command.

[sclause]

I can get into fastboot and run all commands. No error messages.

fastboot getvar version-bootloader
U-Boot 2009.08-lab126 (Spe 22 2011 - 21:34:10)

fastboot getvar version
0.3

fastboot getvar product
Kindle

fastboot getvar serialno
003150XXXX951KGA // I replaced 4 digits by XXXX

fastboot getvar serial
B00E1510XXXXXXFL // I replaced 6 digits by XXXXXX

fastboot getvar accel
// empty result

fastboot getvar mac
F0A225387B36

fastboot getvar sec
5XU7X52L9ZNZ2BH3E8DD

fastboot getvar pcbsn
// same as serialno

fastboot getvar bootmode
main

[knc1]

Super!

Now all we have to do is get someone who's mode command does work to report the result of the same queries.

Comparing the two should give us an idea of how to proceed from here.

[sclause]

I have a K4 (black) at home which is working. I will try it there and write back then.

I can set diags mode from fastboot within this device. I will now try to extract the partitions and write it to the other model.
version-bootloader: U-Boot 2009.08-lab126 (Jan 12 2013 - 20:38:30)


After extracting diags and main (kernel and partition) I uploaded it to the bricked Kindle. After reboot still the same. The bootloader and all other values are the "old" ones.

[knc1]

Originally Posted by sclause

I have a K4 (black) at home which is working. I will try it there and write back then.

I can set diags mode from fastboot within this device. I will now try to extract the partitions and write it to the other model.
version-bootloader: U-Boot 2009.08-lab126 (Jan 12 2013 - 20:38:30)


After extracting diags and main (kernel and partition) I uploaded it to the bricked Kindle. After reboot still the same. The bootloader and all other values are the "old" ones.

The problem will **NOT** be within the partitioned portion of the flash.
So what you have just re-flashed is the same things that Kubrick re-flashes.

[sclause]

Originally Posted by knc1

The problem will **NOT** be within the partitioned portion of the flash.
So what you have just re-flashed is the same things that Kubrick re-flashes.

That's what I guessed.
How can I flash the bootloader? I have not found a way without diags mode.