[Fire HD 8 and HD 10 Original Android Development] whodfkcares:
LCD Display appear to be off

Hello there, well, first of all, sorry for the next text, i will try to be the clear as posible with my english and sorry if it's bad (I'm from Argentina)

From the beggining, i bought and Amazon Prime 8 HD 2017 Version a middle week ago, and searching here a custom rom (like Lineage) i ended in this post that explains how to do the first steps, like unlocking the bootloader.

I choosed de HW method (why? because i have the last version of Fire OS and didnt read about the script that bricks without dissambling) anyway, i proceed, doing all the steps that Vendo indicates. with the next results:

root@raspberrypi:/home/pi/Downloads/amonet# sudo ./bootrom-step.sh

[2019-10-12 00:32:32.600089] Waiting for bootrom

[2019-10-12 00:32:52.496265] Found port = /dev/ttyACM0

[2019-10-12 00:32:52.512054] Handshake

* * * If you have a short attached, remove it now * * *

* * * Press Enter to continue * * *

[2019-10-12 00:32:57.527144] Init crypto engine

[2019-10-12 00:32:57.567265] Disable caches

[2019-10-12 00:32:57.568497] Disable bootrom range checks

[2019-10-12 00:32:57.594245] Load payload from ../brom-payload/build/payload.bin = 0x4888 bytes

[2019-10-12 00:32:57.613496] Send payload

[2019-10-12 00:32:58.482934] Let's rock

[2019-10-12 00:32:58.483984] Wait for the payload to come online...

[2019-10-12 00:32:59.813035] all good

[2019-10-12 00:32:59.814361] Check GPT

[2019-10-12 00:33:00.184949]

[2019-10-12 00:33:00.185478] Sector size (logical): 512 bytes

[2019-10-12 00:33:00.185899] Disk identifier (GUID): AD7EAF21-6306-463D-A3E9-1E0BCBF389C1

[2019-10-12 00:33:00.186197] Partition table holds up to 128 entries

[2019-10-12 00:33:00.186486] This partition table begins at sector 2 and ends at sector 33

[2019-10-12 00:33:00.186759] First usable sector is 34, last usable sector is 61071326

[2019-10-12 00:33:00.187025] Other partition table is at sector 61071359

[2019-10-12 00:33:00.187279]

[2019-10-12 00:33:00.187713] Number Start (sector) End (sector) Size Name

[2019-10-12 00:33:00.190461] 1 1024 7167 3.00 MiB proinfo

[2019-10-12 00:33:00.191753] 2 7168 16383 4.50 MiB PMT

[2019-10-12 00:33:00.193084] 3 16384 17407 512.00 KiB lk

[2019-10-12 00:33:00.194298] 4 17408 18431 512.00 KiB lk2

[2019-10-12 00:33:00.195466] 5 18432 51199 16.00 MiB boot_x

[2019-10-12 00:33:00.196703] 6 51200 86015 17.00 MiB recovery_x

[2019-10-12 00:33:00.198531] 7 86016 96255 5.00 MiB tee1

[2019-10-12 00:33:00.200077] 8 96256 106495 5.00 MiB tee2

[2019-10-12 00:33:00.201628] 9 106496 187391 39.50 MiB metadata

[2019-10-12 00:33:00.203382] 10 187392 189439 1024.00 KiB kb

[2019-10-12 00:33:00.205467] 11 189440 191487 1024.00 KiB dkb

[2019-10-12 00:33:00.206791] 12 191488 192511 512.00 KiB MISC

[2019-10-12 00:33:00.207926] 13 192512 208895 8.00 MiB reserved

[2019-10-12 00:33:00.209049] 14 208896 3515391 1.58 GiB system

[2019-10-12 00:33:00.210181] 15 3515392 4383743 424.00 MiB cache

[2019-10-12 00:33:00.211300] 16 4383744 60619775 26.82 GiB userdata

[2019-10-12 00:33:00.212519] 17 60619776 60845055 110.00 MiB boot

[2019-10-12 00:33:00.214108] 18 60845056 61070335 110.00 MiB recovery

[2019-10-12 00:33:00.286673]

[2019-10-12 00:33:00.287093] Check boot0

[2019-10-12 00:33:00.523885] Check rpmb

[2019-10-12 00:33:00.729567] Clear preloader header

[8 / 8]

[2019-10-12 00:33:01.136412] Downgrade rpmb

[2019-10-12 00:33:01.138588] Recheck rpmb

[2019-10-12 00:33:02.017725] rpmb downgrade ok

[2019-10-12 00:33:02.018611] Flash tz

[6459 / 6459]

[2019-10-12 00:35:20.936738] Flash lk

[950 / 950]

[2019-10-12 00:35:41.841618] Inject payload

[1 / 1]

[962 / 962]

[1 / 1]

[962 / 962]

[2019-10-12 00:36:24.308417] Force fastboot

[2019-10-12 00:36:24.619043] Flash preloader

[280 / 280]

[272 / 272]

[2019-10-12 00:36:36.809730] Reboot to unlocked fastboot

And:

root@raspberrypi:/home/pi/Downloads/amonet# sudo ./fastboot-step.sh

Your device will be reset to factory defaults...

Press Enter to Continue...

target reported max download size of 113246208 bytes

sending 'recovery_x' (13196 KB)...

OKAY [ 0.493s]

writing 'recovery_x'...

OKAY [ 0.601s]

finished. total time: 1.094s

******** Did you mean to fastboot format this ext4 partition?

erasing 'userdata'...

OKAY [ 1.410s]

finished. total time: 1.410s

target reported max download size of 113246208 bytes

sending 'MISC' (0 KB)...

OKAY [ 0.018s]

writing 'MISC'...

OKAY [ 0.008s]

finished. total time: 0.025s

rebooting...

finished. total time: 0.102s

Your device will now reboot into TWRP.

After that, nothing happens, even in the process the LCD didnt turn on or show something. I will attach photos of the disambled tablet to show that all te conectors and cables are where they have to be.

I didnt know what to do right now, yes, i tried to reboot it by adb, but it says: "root@raspberrypi:/home/pi/Downloads/amonet# adb reboot bootloader

error: no devices/emulators found"

Could it be broken for any reason? am i missing something? should i claim warranty?

Thx!