Originally Posted by stunts513
No need to purchase it for the 8.9" model from what I know, if the device shows up in the device manager for a moment as a jem device then install the drivers in my signature and get a copy of the fastboot command and run "fastboot -i 0x1949 getvar product" with the kindle off and unplugged, then plug it in, it should power on and go into fastboot mode. From there you should be able to reflash it to a working state.
Sent from my Amazon Kindle Fire HD running CM10.1 Tablet UI using xda-developers app
Had the exact same problem as him and couldn't find any info anywhere. This helped me fix it instantly
Thanks for the info!