[Fire HD 8 and HD 10 Original Android Development] jlim0930:
I have a bricked HD 8 7th gen. Not sure how it was bricked since its been like this for a while.

When i plug in the device it shows

==> /var/log/kern.log <==
Dec 17 16:16:51 ubuntu kernel: [ 1574.396715] usb 2-1: new high-speed USB device number 11 using ehci-pci
Dec 17 16:16:51 ubuntu kernel: [ 1574.553668] usb 2-1: New USB device found, idVendor=0e8d, idProduct=2000, bcdDevice= 1.00
Dec 17 16:16:51 ubuntu kernel: [ 1574.553682] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dec 17 16:16:51 ubuntu kernel: [ 1574.553687] usb 2-1: Product: MT65xx Preloader
Dec 17 16:16:51 ubuntu kernel: [ 1574.553692] usb 2-1: Manufacturer: MediaTek
Dec 17 16:16:51 ubuntu kernel: [ 1574.557233] cdc_acm 2-1:1.0: Zero length descriptor references
Dec 17 16:16:51 ubuntu kernel: [ 1574.557249] cdc_acm: probe of 2-1:1.0 failed with error -22
Dec 17 16:16:51 ubuntu kernel: [ 1574.557729] cdc_acm 2-1:1.1: ttyACM1: USB ACM device

==> /var/log/syslog <==
Dec 17 16:16:51 ubuntu kernel: [ 1574.396715] usb 2-1: new high-speed USB device number 11 using ehci-pci
Dec 17 16:16:51 ubuntu kernel: [ 1574.553668] usb 2-1: New USB device found, idVendor=0e8d, idProduct=2000, bcdDevice= 1.00
Dec 17 16:16:51 ubuntu kernel: [ 1574.553682] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dec 17 16:16:51 ubuntu kernel: [ 1574.553687] usb 2-1: Product: MT65xx Preloader
Dec 17 16:16:51 ubuntu kernel: [ 1574.553692] usb 2-1: Manufacturer: MediaTek
Dec 17 16:16:51 ubuntu kernel: [ 1574.557233] cdc_acm 2-1:1.0: Zero length descriptor references
Dec 17 16:16:51 ubuntu kernel: [ 1574.557249] cdc_acm: probe of 2-1:1.0 failed with error -22
Dec 17 16:16:51 ubuntu kernel: [ 1574.557729] cdc_acm 2-1:1.1: ttyACM1: USB ACM device
Dec 17 16:15:20 ubuntu gnome-shell[5651]: [GFX1-]: Couldn't sanitize RENDERER device: AMD RV710
Dec 17 16:16:51 ubuntu mtp-probe: checking bus 2, device 11: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-1"
Dec 17 16:16:51 ubuntu mtp-probe: bus: 2, device: 11 was not an MTP device
Dec 17 16:16:51 ubuntu snapd[1326]: hotplug.go:199: hotplug device add event ignored, enable experimental.hotplug
Dec 17 16:16:51 ubuntu mtp-probe: checking bus 2, device 11: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-1"
Dec 17 16:16:51 ubuntu mtp-probe: bus: 2, device: 11 was not an MTP device

I tried to run both bootrom-step.sh and bootrom-step-minimal.sh but am keep getting the same results

[2021-12-17 16:14:16.297660] Waiting for bootrom
[2021-12-17 16:14:31.770383] Found port = /dev/ttyACM0
[2021-12-17 16:14:31.797342] Handshake

* * * If you have a short attached, remove it now * * *
* * * Press Enter to continue * * *

b''
b'\x00\x01'
Traceback (most recent call last):
File "main.py", line 256, in <module>
main()
File "main.py", line 129, in main
load_payload(dev, "../brom-payload/build/payload.bin")
File "/home/ubuntu/Downloads/amonet/modules/load_payload.py", line 123, in load_payload
dev.write32(0x10007008, 0x1971) # low-level watchdog kick
File "/home/ubuntu/Downloads/amonet/modules/common.py", line 163, in write32
self.check(self.dev.read(2), b'\x00\x01') # arg check
File "/home/ubuntu/Downloads/amonet/modules/common.py", line 90, in check
raise RuntimeError("ERROR: Serial protocol mismatch")
RuntimeError: ERROR: Serial protocol mismatch

What am i missing or doing wrong?