However, somewhere in that process I bricked the device. I went through the installing the Amazon software again in TWRP and told the device to reboot, but it is now stuck on the boot screen and will not respond to adb commands I send it.
I used the Kindle Fire Utility to install TWRP again, and it said it was successfully installed. I tried to boot into it through the Kindle Fire Utility menu, but it is still stuck.
It just so happens that I have a fastboot cable for this, so I plugged it in and tried to boot into recovery by issuing
C:\kfu\tools>fastboot oem idme bootmode 5001
It just says:
<waiting for device>
and nothing happens.
I don't know what else to do. I do think this factory cable put me in fastboot mode because the Windows device manager is showing "Android ADB Interface" (which according to Kindle Fire for Beginners is what it is supposed to say if the drivers are good and I am in fastboot mode), but I do not know how else to make use of this.
I am really stuck here, and I hope someone will take the time to help. My sister's birthday is in two days and I need to get this Kindle fixed and in the mail