[Fire HD 8 and HD 10 Original Android Development] deathlessster:
Ok

Now my device showing amazon logo and reset every 10 second i use bootrom-step command and output script is :

khalid@khalid:~/Downloads/amonet-douglas-v1.1/amonet$ sudo ./bootrom-step.sh

[sudo] password for khalid:

[2019-09-04 22:48:41.338658] Waiting for bootrom

[2019-09-04 22:48:54.141256] Found port = /dev/ttyACM0

[2019-09-04 22:48:54.162453] Handshake

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

* * * Press Enter to continue * * *

[2019-09-04 22:48:56.264960] Init crypto engine

[2019-09-04 22:48:57.012440] Disable caches

[2019-09-04 22:48:57.026085] Disable bootrom range checks

[2019-09-04 22:48:57.506266] Load payload from ../brom-payload/build/payload.bin = 0x4888 bytes

[2019-09-04 22:48:57.521699] Send payload

[2019-09-04 22:49:23.567851] Let's rock

[2019-09-04 22:49:23.588354] Wait for the payload to come online...

[2019-09-04 22:49:24.308652] all good

[2019-09-04 22:49:24.325801] Check GPT

[2019-09-04 22:49:24.869941]

[2019-09-04 22:49:24.870124] Sector size (logical): 512 bytes

[2019-09-04 22:49:24.870176] Disk identifier (GUID): BE9E3536-6B98-4084-A368-36B21A533077

[2019-09-04 22:49:24.870212] Partition table holds up to 128 entries

[2019-09-04 22:49:24.870246] This partition table begins at sector 2 and ends at sector 33

[2019-09-04 22:49:24.870278] First usable sector is 34, last usable sector is 30535646

[2019-09-04 22:49:24.870309] Other partition table is at sector 30535679

[2019-09-04 22:49:24.870339]

[2019-09-04 22:49:24.870391] Number Start (sector) End (sector) Size Name

[2019-09-04 22:49:24.871204] 1 1024 7167 3.00 MiB proinfo

[2019-09-04 22:49:24.871665] 2 7168 16383 4.50 MiB PMT

[2019-09-04 22:49:24.872220] 3 16384 17407 512.00 KiB lk

[2019-09-04 22:49:24.873103] 4 17408 18431 512.00 KiB lk2

[2019-09-04 22:49:24.873606] 5 18432 51199 16.00 MiB boot_x

[2019-09-04 22:49:24.874273] 6 51200 86015 17.00 MiB recovery_x

[2019-09-04 22:49:24.874777] 7 86016 96255 5.00 MiB tee1

[2019-09-04 22:49:24.875425] 8 96256 106495 5.00 MiB tee2

[2019-09-04 22:49:24.876026] 9 106496 187391 39.50 MiB metadata

[2019-09-04 22:49:24.876768] 10 187392 189439 1024.00 KiB kb

[2019-09-04 22:49:24.877372] 11 189440 191487 1024.00 KiB dkb

[2019-09-04 22:49:24.877967] 12 191488 192511 512.00 KiB MISC

[2019-09-04 22:49:24.878574] 13 192512 208895 8.00 MiB reserved

[2019-09-04 22:49:24.879198] 14 208896 3515391 1.58 GiB system

[2019-09-04 22:49:24.879693] 15 3515392 4383743 424.00 MiB cache

[2019-09-04 22:49:24.880292] 16 4383744 30084095 12.25 GiB userdata

[2019-09-04 22:49:24.881296] 17 30084096 30309375 110.00 MiB boot

[2019-09-04 22:49:24.882060] 18 30309376 30534655 110.00 MiB recovery

[2019-09-04 22:49:25.006290]

[2019-09-04 22:49:25.009896] Check boot0

[2019-09-04 22:49:25.310469] Check rpmb

[2019-09-04 22:49:25.545918] Clear preloader header

[8 / 8]

[2019-09-04 22:49:26.143972] Downgrade rpmb

[2019-09-04 22:49:26.158158] Recheck rpmb

[2019-09-04 22:49:27.059259] rpmb downgrade ok

[2019-09-04 22:49:27.086486] Flash tz

[6459 / 6459]

[2019-09-04 22:53:45.382279] Flash lk

[950 / 950]

[2019-09-04 22:54:23.728713] Inject payload

[1 / 1]

[962 / 962]

[1 / 1]

[962 / 962]

[2019-09-04 22:55:41.280159] Force fastboot

[2019-09-04 22:55:41.689014] Flash preloader

[280 / 280]

[272 / 272]

[2019-09-04 22:56:04.451791] Reboot to unlocked fastboot

khalid@khalid:~/Downloads/amonet-douglas-v1.1/amonet$

No hacked BL just amazon logo and reset every 10 second

i thing my device totally brick