I have a Kindle Fire HD 7 which I am running Amazon OS 7.2.3. I have followed various guides / tools and installed 2nd bootloader and TWRP. I then installed Cyanogenmod 11 nightly for tate. When I reboot after the install I get the Cyanogenmod boot animation and thats it, I have waited for 10 - 15 minutes and nothing happens just see the boot animation. I restore 7.2.3 and that boots fine. What should I look at to figure out what's going on here.