Originally Posted by stunts513
This is going to be a pain to type on my phone... plug the device in while off, keep the device manager open when doing this, it should briefly show up as a jem device, when it does right click it and hit update driver, point it to where you will have downloaded and extracted the driver in my signature. Once you install the drivers, shut it off and unplug it, you will need to open a command prompt that's cd'd into a directory like kffa where you can run a fastboot command. Then run
fastboot -i 0x1949 getvar product
it should say waiting for device, once it does plug your kindle in, it should go into fastboot mode and you can restore with kffa.
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I have the exact same problem as the original poster with my Kindle Fire HD 8.9". I tried downloading the drivers in your description. I connect the kindle and try to update the drivers for Jem-PVT-Prod-04. I direct my computer to install the drivers that I extracted, however it returns an error saying that "the hash for the file is not present in the specified catalog file. The file is likely corrupt or the victim of tampering." I'm not sure what I'm doing wrong, this is my first time trying to root android. Thanks so much for the help!