[Q] Recovery works but can't restore or mount KF? Need to unroot.

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http://forum.xda-developers.com – I just fixed my one KF and now my other one is in trouble. When it powers up it just bootloops into Kindle Fire splash screen(blue & grey letters) then just keeps restarting. If I hold the power button in it gives me 3 options; normal boot, recovery, reset bootmode. If I click normal boot or reset bootmode they do nothing except return me to the Kindle Fire screen. I can get into recovery(twrp) but I cant restore any of my backups. I can't seem to mount the KF through recovery either. Also, every time the Kindle Fire restarts I get a "USB Device Not Recognized" error that pops up (HowTos)