[Kindle Fire HDX 7" & 8.9" Q&A, Help & Troubleshoot] stubbe:
Hey guys I desperately need help here. I got this Kindle Fire 8.9" years ago, and got abandoned by my Dad because we live in SEA, can't do much with it, I cannot even get the free apps through Amazon Appstore. I can use fake US CC in this matter to get the free apps but Is that even legit? I have real CC and a legit Amazon account I bought real stuffs from Amazon too back then (books, some shirts and some gadgets) but that doesn't seem to help much.

Anyway sideloading apps from Google Play don't help much since the compatibility are horrible, and sideloading the Google Playstore itself just don't work. I've attempted to install all the Playstore requirements, some installed and some spit out "Parse error - There was a problem parsing the package".

I figure I needed to convert it to a full Android. So searching around I found about "fastboot" but I'm not familiar with it. I only got my hands dirty on Odin and SP Flash Tool.

I followed the instruction here :

http://xdaforums.com/kindle-fire-hd/8-9-development/root-install-twrp-android-fire-os-8-5-1-t3278286

Works very well, rooted with KingRoot (which I already have offline), installed FireFlash, flashed the bootloader and recovery (100% like the instruction told me), got into TWRP, did a full backup of the current ROM and reboot. I can get it to the Carousel just fine. I attempted to flash Gapps package for ICS (gapps-ics-20120429-signed.zip) from here (found from googling around, checked the content too) :

https://docs.google.com/file/d/0B6zwjGaKK0GVUll5Sm95LWpNaDg/edit

The installation went quite well, after running Play Store, it crashes constantly. Found another tutorial on installing Google Apps on another forum, which I lost the link, so I want to attempt another Google Play install before went to CyanogenMod.

I noticed something, after each reboot, I need to re-flash TWRP and reboot. When I attempt to reflash TWRP I notice that kfhd8freedom-boot-8.4.6.img didn't have any warning anymore.

The tablet was a gift from my brother in law to my Dad. It was never been reset ever since. In fact after I installed Google Play, it still got my brother in law login in it, even though it doesn't have the Google Play store. So I figure I need to do a factory reset and start 100% fresh, just to be sure.

And this is where it went wrong. After the factory reset the device rebooted into fastboot mode. I don't know why. I see the orange Kindle Fire logo, then the screen went red then "fast boot mode" appear on screen. At this point I cannot do anything to it. Followed every power button tutorials out there, like pressing the power for 20 seconds then release then hold it for 2 seconds, or power plus volume up/volume down, no luck.

I plugged it into my PC, it shows as "Android", and below it "Android ADB". So I tried to use ADB console for it, it didn't respond. However it responds to "fastboot" commands, tried some commands from here :

http://xdaforums.com/showthread.php?t=1474566&page=2

These commands works :

fastboot -i 0x1949 oem idme bootmode 4000

fastboot -i 0x1949 reboot

But it went straight back to fastboot mode. My guess is that the culprit is kfhd8freedom-boot-8.4.6.img.

Looking around in the forum there're so many obsolete solutions, like Kindle Fire HD First Aide download link are dead and it was intended for Fire 7.

So the questions are :

How would you recommend me to fix this? Fastboot command definitely still working from PC to my Kindle, if that is any help for this case. I really have no clue on what to do next. I only experienced with Odin and SP Flash Tool. I have no experience with fastboot.

I don't have any stock rom at hands, neither can find any googling around. Can anyone provide me with one? Just in case anything bad happen again after I fix this.

Will this work for 8.9"? Since he posted it in Fire 7 forum : http://xdaforums.com/showthread.php?t=1951254

Info on my devices :

Kindle Fire Jem 8.9"

Latest stock (8.5.1_user_5159720) was installed

Rooted with KingRoot before went brick

I have no fastboot cable, but the fastboot command mentioned earlier works on regular USB (OnePlus One's stock cable)

Gapps for ICS was installed within too

I got both Windows 10 and Windows XP PCs at my hand. XP seems to recognize it better as ADB something under "android" in device manager.

I also got Ubuntu 16.04 installation, if needed.

Please help.

Thank you in advance!