[Fire TV Original Android Development] atdog69:
Ok at last I did the shorting method described in #2.

There was an error message after 5.) and at he end reports a bad gpt...:

[2022-02-02 17:37:48.081670] Waiting for bootrom

[2022-02-02 17:38:05.259045] Found port = /dev/ttyACM0

[2022-02-02 17:38:05.261003] Handshake

[2022-02-02 17:38:05.264970] Disable watchdog

[2022-02-02 17:38:05.288951] Waiting for bootrom

[2022-02-02 17:38:13.451098] Found port = /dev/ttyACM0

* * * Remove the short and press Enter * * *

[2022-02-02 17:39:06.142558] Init crypto engine

[2022-02-02 17:39:06.375515] Disable caches

[2022-02-02 17:39:06.379861] Disable bootrom range checks

[2022-02-02 17:39:06.496834] Load payload from ../brom-payload/build/payload.bin = 0x4760 bytes

[2022-02-02 17:39:06.505065] Send payload

[2022-02-02 17:39:11.092831] Let's rock

[2022-02-02 17:39:11.097486] Wait for the payload to come online...

[2022-02-02 17:39:11.101744] all good

[2022-02-02 17:39:11.102095] Clear preloader header

[8 / 8]

[2022-02-02 17:39:12.496797] Check GPT

[2022-02-02 17:39:12.949994]

[2022-02-02 17:39:12.950431] Sector size (logical): 512 bytes

[2022-02-02 17:39:12.950863] Disk identifier (GUID): 57E14FDD-053E-48B1-B7F4-5B52586FE145

[2022-02-02 17:39:12.951094] Partition table holds up to 128 entries

[2022-02-02 17:39:12.951325] This partition table begins at sector 2 and ends at sector 33

[2022-02-02 17:39:12.951545] First usable sector is 34, last usable sector is 15269854

[2022-02-02 17:39:12.951760] Other partition table is at sector 15269887

[2022-02-02 17:39:12.952068]

[2022-02-02 17:39:12.952398] Number Start (sector) End (sector) Size Name

[2022-02-02 17:39:12.957634] 1 1024 1277 127.00 KiB PRO_INFO

[2022-02-02 17:39:12.958403] 2 2048 12287 5.00 MiB NVRAM

[2022-02-02 17:39:12.959158] 3 12288 22527 5.00 MiB TEE1

[2022-02-02 17:39:12.959888] 4 22528 32767 5.00 MiB TEE2

[2022-02-02 17:39:12.960604] 5 32768 34815 1024.00 KiB lk

[2022-02-02 17:39:12.961338] 6 34816 86015 25.00 MiB boot

[2022-02-02 17:39:12.961984] 7 86016 137215 25.00 MiB recovery

[2022-02-02 17:39:12.962243] 8 137216 139263 1024.00 KiB KB

[2022-02-02 17:39:12.962510] 9 139264 141311 1024.00 KiB DKB

[2022-02-02 17:39:12.962769] 10 141312 142335 512.00 KiB MISC

[2022-02-02 17:39:12.963025] 11 142336 158719 8.00 MiB LOGO

[2022-02-02 17:39:12.964743] 12 158720 182015 11.38 MiB EXPDB

[2022-02-02 17:39:12.964988] 13 182016 2659615 1.18 GiB system

[2022-02-02 17:39:12.965229] 14 2659616 3171615 250.00 MiB cache

[2022-02-02 17:39:12.965470] 15 3171616 15269854 5.77 GiB userdata

[2022-02-02 17:39:12.986369]

[2022-02-02 17:39:12.986613] Modify GPT

[2022-02-02 17:39:12.987084] Validate GPT

[2022-02-02 17:39:12.987414]

[2022-02-02 17:39:12.987500] Sector size (logical): 512 bytes

[2022-02-02 17:39:12.987596] Disk identifier (GUID): 57E14FDD-053E-48B1-B7F4-5B52586FE145

[2022-02-02 17:39:12.987672] Partition table holds up to 128 entries

[2022-02-02 17:39:12.987750] This partition table begins at sector 2 and ends at sector 33

[2022-02-02 17:39:12.987825] First usable sector is 34, last usable sector is 15269854

[2022-02-02 17:39:12.987898] Other partition table is at sector 15269887

[2022-02-02 17:39:12.987970]

[2022-02-02 17:39:12.988081] Number Start (sector) End (sector) Size Name

[2022-02-02 17:39:12.988346] 1 1024 1277 127.00 KiB PRO_INFO

[2022-02-02 17:39:12.988637] 2 2048 12287 5.00 MiB NVRAM

[2022-02-02 17:39:12.988876] 3 12288 22527 5.00 MiB TEE1

[2022-02-02 17:39:12.989122] 4 22528 32767 5.00 MiB TEE2

[2022-02-02 17:39:12.989367] 5 32768 34815 1024.00 KiB lk

[2022-02-02 17:39:12.989613] 6 34816 86015 25.00 MiB boot_x

[2022-02-02 17:39:12.989858] 7 86016 137215 25.00 MiB recovery_x

[2022-02-02 17:39:12.990096] 8 137216 139263 1024.00 KiB KB

[2022-02-02 17:39:12.990334] 9 139264 141311 1024.00 KiB DKB

[2022-02-02 17:39:12.990594] 10 141312 142335 512.00 KiB MISC

[2022-02-02 17:39:12.990846] 11 142336 158719 8.00 MiB LOGO

[2022-02-02 17:39:12.991094] 12 158720 182015 11.38 MiB EXPDB

[2022-02-02 17:39:12.991341] 13 182016 2659615 1.18 GiB system

[2022-02-02 17:39:12.991588] 14 2659616 3171615 250.00 MiB cache

[2022-02-02 17:39:12.991833] 15 3171616 3233055 30.00 MiB boot

[2022-02-02 17:39:12.992078] 16 3233056 3294495 30.00 MiB recovery

[2022-02-02 17:39:12.992316] 17 3294496 15269854 5.71 GiB userdata

[2022-02-02 17:39:13.008095]

[2022-02-02 17:39:13.008202] Flash new primary GPT

[34 / 34]

[2022-02-02 17:39:13.597928] Flash new backup GPT

[33 / 33]

[2022-02-02 17:39:14.307863]

[2022-02-02 17:39:14.308307] Sector size (logical): 512 bytes

[2022-02-02 17:39:14.308602] Disk identifier (GUID): 57E14FDD-053E-48B1-B7F4-5B52586FE145

[2022-02-02 17:39:14.308832] Partition table holds up to 128 entries

[2022-02-02 17:39:14.309063] This partition table begins at sector 2 and ends at sector 33

[2022-02-02 17:39:14.309280] First usable sector is 34, last usable sector is 15269854

[2022-02-02 17:39:14.309497] Other partition table is at sector 15269887

[2022-02-02 17:39:14.309708]

[2022-02-02 17:39:14.310033] Number Start (sector) End (sector) Size Name

[2022-02-02 17:39:14.310855] 1 1024 1277 127.00 KiB PRO_INFO

[2022-02-02 17:39:14.311569] 2 2048 12287 5.00 MiB NVRAM

[2022-02-02 17:39:14.312303] 3 12288 22527 5.00 MiB TEE1

[2022-02-02 17:39:14.313017] 4 22528 32767 5.00 MiB TEE2

[2022-02-02 17:39:14.313727] 5 32768 34815 1024.00 KiB lk

[2022-02-02 17:39:14.314437] 6 34816 86015 25.00 MiB boot

[2022-02-02 17:39:14.315183] 7 86016 137215 25.00 MiB recovery

[2022-02-02 17:39:14.315898] 8 137216 139263 1024.00 KiB KB

[2022-02-02 17:39:14.316610] 9 139264 141311 1024.00 KiB DKB

[2022-02-02 17:39:14.317316] 10 141312 142335 512.00 KiB MISC

[2022-02-02 17:39:14.318028] 11 142336 158719 8.00 MiB LOGO

[2022-02-02 17:39:14.318783] 12 158720 182015 11.38 MiB EXPDB

[2022-02-02 17:39:14.319039] 13 182016 2659615 1.18 GiB system

[2022-02-02 17:39:14.319484] 14 2659616 3171615 250.00 MiB cache

[2022-02-02 17:39:14.319734] 15 3171616 15269854 5.77 GiB userdata

[2022-02-02 17:39:14.340020]

Traceback (most recent call last):

File "main.py", line 146, in <module>

main()

File "main.py", line 84, in main

raise RuntimeError("bad gpt")

RuntimeError: bad gpt

After that I tried the next step: sudo ./fastboot-step.sh

but after "Press Enter to continue" I got an error message:

./fastboot-step.sh: Line 8: fastboot: Command not found

After booting the box went to the same procedere white ama*n logo and TWRP with all the red data, cache and system errors as before.

:-(((