Help! Nook HD+ Won't boot after flash new recovery

Jan 26, 2016
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So, I was running the latest CM snapshot on my Nook HD+ and decided that I wanted to have TWRP instead of CWM as my custom recovery. I downloaded the latest TWRP img and flashed using Flashify. I rebooted and now it's stuck on the 'Nook' boot screen and doesn't progress. I can't boot into recovery or the OS. What should I do?

Apologies in advance for my naivity!
 
Jan 26, 2016
13
3
0
Okay, more details. Tried to run CWM recovery from a bootable SD card (as per instructions on another thread). With the SD card in the Nook won't even power on (black screen). Have a bricked it?