Thanks Meter 605
Join Date: Feb 2013
Location: New Braunfels, TX
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Here's the guide for 2nd bootloader + twrp, ignore the fact this process was meant for a lesser version, just either put the rom on ahead of time or push the rom on with an "adb push" once it starts to bootloop into recovery. The bootloop is of no concern, it won't happen once you flash another rom.
Also just a warning, a bad fastboot cable can fry the kindles USB circuit, assume an ic or something partially shorts out, have seen it happen before on the forum. I don't have a link handy but there's a nifty adapted that goes between the end of a micro-usb cable and the kindle for fastboot mode, I believe its in the op of the thread I linked. Oh and please check the md5sum of the bootloader before downgrading/flashing it or you will risk hard brick it and be putting that soldering iron to some really good use...
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My Wallpaper Fix for KF2, KFHD 7", and KFHD 8.9" is HERE
Please Read the instructions and use the debugger if you run into errors.
My own modified adb drivers for just about all kindles (includes old twrp and cm versions) HERE
Tablet UI Patch for latest CM10.1 build HERE
Please send complaints to /dev/null