I successfully got my device rooted from this thread http://forum.xda-developers.com/show....php?t=2125628
After rooting, I tried to install the android and jellybean OS into my device with the following help from these threads:
The main problem now is when I tried to install TWRP (Function 3). When the "run.bat" tried to fastboot; nothing happens to my Kindle. I tried turning on and off my kindle a few times and the problem still persists. So I rerun the "run.bat" file and used the function "1" to try to boot my kindle. My kindle got rebooted but then it just like a normal reboot and it went back to the Amazon homescreen. No matter how many times I tried to manual reboot from "run.bat", it is still the same.
When I am at the KFU menu, the statuses for my device are shown as follows:
ADB Status: Online
Boot Status: Unknown
No matter what I do, the Boot Status will always be shown as "unknown".
I am wondering is it even possible to install android and jellybean on the new Kindle Fire 7" 2nd Generation device? Thanks a lot and your help will be deeply appreciated.
I came across this site and got to know all of the links I posted above.