[Q] KitKat 4.4 - Nook HD, HD+ Q&A, Help & Troubleshooting

Hey, so I'll start off by saying everything works fantastic with the CWM11.0 and KitKat ROM I installed! Everything is smooth and amazing! The only problem is the location services being buggy and not working with a few apps, but a thread about that has already been made and I'll just monitor that for any solutions. My question is since there's no emmc version of KitKat yet for the Nook HD: for future official KitKat updates, how would we install them? I'm assuming you can't auto-update because it's running from the EXT. SD card. Anyone have any ideas how the updates would be installed?

Corkerman said:
Hey, so I'll start off by saying everything works fantastic with the CWM11.0 and KitKat ROM I installed! Everything is smooth and amazing! The only problem is the location services being buggy and not working with a few apps, but a thread about that has already been made and I'll just monitor that for any solutions. My question is since there's no emmc version of KitKat yet for the Nook HD: for future official KitKat updates, how would we install them? I'm assuming you can't auto-update because it's running from the EXT. SD card. Anyone have any ideas how the updates would be installed?
Click to expand...
Click to collapse
There are KitKat nightlies for the HD that run on emmc
https://download.cyanogenmod.org/?device=hummingbird&type=nightly

jpisini said:
There are KitKat nightlies for the HD that run on emmc
https://download.cyanogenmod.org/?device=hummingbird&type=nightly
Click to expand...
Click to collapse
And do I just copy it to the sd card or emmc and install it using CWM on start up?

You should be able I copy it to either. I would recommend external card so it doesn't get accidentally erased. You will need a new recovery either CWM or TWRP that is compatible with Kit Kat. I am not sure of the versions I have the HD plus.
Sent from my BN NookHD+ using XDA Free mobile app

Alright, I think I have the latest version of cwm. Can I just install it then or do I need to clear the external card's kitkat OS first? And I can remove the SD card before rebooting and the KitKat OS will run without the card, right? One more thing: will it wipe my device if I install it on the emmc, and will I still need to install the GAPPS add on once again? Sorry for the noob questions \:

Corkerman said:
Alright, I think I have the latest version of cwm. Can I just install it then or do I need to clear the external card's kitkat OS first? And I can remove the SD card before rebooting and the KitKat OS will run without the card, right? One more thing: will it wipe my device if I install it on the emmc, and will I still need to install the GAPPS add on once again? Sorry for the noob questions \:
Click to expand...
Click to collapse
Follow this thread.....great directions for installing CM11 .....
http://forum.xda-developers.com/showthread.php?t=2600572

Yes those directions are better than anything I could write up. If you have specific questions just ask.
Sent from my SPH-L900 using XDA Free mobile app

Everything works now! Thanks for the links, guys!

Related

Can I root with a flashable zip?

I have nook ver 1.3 stock. I have also made a bootable Clockwork recovery SD card. Is there a way to use this sd card to root the device and install CM7 to the emmc?
I assume I need to root the device. New to the nook.
You don't need to root to install CM7 from a clockworkmod micro SD.
Sent from my NookColor using xda premium
SCrid2000 said:
You don't need to root to install CM7 from a clockworkmod micro SD.
Sent from my NookColor using xda premium
Click to expand...
Click to collapse
I suspected that. So the new ROM and CWM recovery will be installed to emmc? It seems like this maybe the easiest way and best way to go back and forth between roms/stock, rather than rooting it and doing it internally. Agree?
I love this device. I may pick a second one up from ebay (B&N refurbished).
CWM won't be installed, but you can install that with ROM manager once CM7 is installed.
Sent from my NookColor using xda premium
SCrid2000 said:
CWM won't be installed, but you can install that with ROM manager once CM7 is installed.
Sent from my NookColor using xda premium
Click to expand...
Click to collapse
Thanks. I assume this can also be done with CM7 variations, ie, phiremod and miui, right?
Yes but once CM7 is installed (which is rooted by default) it's much easier to just flash new roms using ROM Manager. I recommend getting the premium version if you want to install nightlies.
SCrid2000 said:
Yes but once CM7 is installed (which is rooted by default) it's much easier to just flash new roms using ROM Manager. I recommend getting the premium version if you want to install nightlies.
Click to expand...
Click to collapse
got you. I already have the premium RM. Thanks
one more question, booting from the sd card and the CWR on it, I format data, cache, emmc, boot and system andthen flashed phiremod rom. somehow my wifi settings and wallpaper were saved. I thought I would get a setup screen. Is it because these roms are not rooted and it's just being installed over stock?
I thought those settings were saved in /data. Hmm.
In the future, I wouldn't recommend formatting anything other than system when you flash a new ROM unless it specifically states to (which it shouldn't if it's a well written rom ).
It sounds like you didn't actually format those, which would definitely be a good thing, especially for EMMC.
loveubuntu said:
I have nook ver 1.3 stock. I have also made a bootable Clockwork recovery SD card. Is there a way to use this sd card to root the device and install CM7 to the emmc?
I assume I need to root the device. New to the nook.
Click to expand...
Click to collapse
See a few posts down..
http://forum.xda-developers.com/showthread.php?t=1030227
Please use search
Ty. As much as I love xda the search function has always been terrible. I think its improved but in the past it was nothing more than a Google search.
Sent from my SHIFTAO5P using xda premium

[Q] Root questions.

I've tried to read as much as I can about rooting the Nook HD+ here, but I have some questions before my attempts. It sounds like some Nook HD+ taking rooting fine while others do not. Through some of the reading I've done here, it sounds like you can dual boot if you have CWM/CM installed on an SD card. Before attempting anything, can you leave the stock Nook ICS on the internal memory and have CWM/CM installed on an external SD Card? I would feel more comfortable about that because it sounds like this is really hit and miss. If rooting does not take I can pull out the SD card and boot like normal to stock Nook ICS
I've never had a problem with rooting any devices that I've owned. This is the first time I've been hesitant about rooting. I just bought it today. I don't want to brick it. I liked how easy it was to root the Galaxy S3 with odin. I would feel more comfortable if there was something more automated in this case. It looked like there was a lot of different links to files for root. Which one is the current? Sorry if this is asked a lot. Thanks in advance for the help
Richard
I think I found the answers. I should have read a little more. I guess there is no way to do this without removing the stock firmware. That is fine with me, but I'm still nervous because the reports of Nooks boot looping seem to be frequent compared to other devices. I know this can obviously happen with any device. It looks like I can leave the stock firmware/ bootloader untouched if I understand this post correctly? I can install a bootloader and CM 10.1 to an external SD without affecting the Nook bootloader and firmware? Thanks again
http://forum.xda-developers.com/showthread.php?t=2317500
Well, first off I am very frustrated how so many users get confused about "rooting". Rooting is just the process of giving an operating system 'root' access. You can 'root' stock by flashing a zip with CWM. It is still stock but has root access.
Or you can replace stock with a totally different operating system (like CM). CM comes already rooted and unfortunately many users call installing CM rooting. It is not. It is installing a new operating system that just also happens to be already rooted.
Ok, off my soapbox.
If you are worried about messing up your stock then you should install CM to an SD. That leaves stock unmodified and allows CM to run independently. Just remove the SD and it will boot next time to stock. There are instructions to install to SD in the development threads.
All HD/HD+'s will have no trouble with rooting stock or installing CM. It is the actual ability to boot using a bootable SD that is sometimes troublesome. And you must be able to boot to an SD to either root stock or install CM. And of course if you want CM on SD, that must be able to boot also.
Sent from my BN NookHD+ using XDA Premium HD app
Sorry, I should have been a little more clear. I was worried about putting CWM on the internal storage. I use the term rooting to broadly here. I saw people had trouble with CWM on internal storage and some not. I have plenty of experience. I'm not worried I would make mistake. Seems like this device has had recent history of problems with making any chances to the stock firmware. Most of the post I read were from people who bought the Nook recently. That is what made me thing before making a change.. The last thing anyone wants is to brick a new device. That's why I liked the idea of using external storage first. Thanks for clearing that up.
Richard
riche1 said:
Sorry, I should have been a little more clear. I was worried about putting CWM on the internal storage. I use the term rooting to broadly here. I saw people had trouble with CWM on internal storage and some not. I have plenty of experience. I'm not worried I would make mistake. Seems like this device has had recent history of problems with making any chances to the stock firmware. Most of the post I read were from people who bought the Nook recently. That is what made me thing before making a change.. The last thing anyone wants is to brick a new device. That's why I liked the idea of using external storage first. Thanks for clearing that up.
Richard
Click to expand...
Click to collapse
Well putting CM on internal is very easy and reliable once you get the SD to boot. And that thread you referenced is the right one to be following if you want it on internal.
However if you want CM on SD follow a different thread.
Sent from my BN NookHD+ using XDA Premium HD app
leapinlar said:
Well putting CM on internal is very easy and reliable once you get the SD to boot. And that thread you referenced is the right one to be following if you want it on internal.
However if you want CM on SD follow a different thread.
Sent from my BN NookHD+ using XDA Premium HD app
Click to expand...
Click to collapse
Which one would that be? I thought it was all on that one linj. Thanks for pointing that out.
I'm sure this all works fine on internal storage, like you said. Normally I would go for it, but this is the first time I have been a little nervous.
riche1 said:
Which one would that be? I thought it was all on that one linj. Thanks for pointing that out.
I'm sure this all works fine on internal storage, like you said. Normally I would go for it, but this is the first time I have been a little nervous.
Click to expand...
Click to collapse
I would suggest this one:
http://forum.xda-developers.com/showthread.php?t=2087988
That puts CM10.1 on it and it is very stable. There are other threads for CM10.2 and for the SGT7 modified CM10.1 and CM10.2 on SD, but I think the one above would be your best bet.
Sent from my BN NookHD+ using XDA Premium HD app

Need help updating CyanogenMod from my Nook HD+

I have CyanogenMod Version 10.1.3-ovation on my Nook Hd+ and I tried to update by going to CyanogenMod updates in the settings menu. It is set for stable only and I downloaded cm-10.2.1 and when I click the Apply update button, it says.......
"You are about to upgrade to cm-10.2.1-ovation.zip.
If you press Update, the device will restart itself in recovery mode to install the update.
Note: This feature requires a compatible Recovery or updates will need to be installed manually."
I click update and the device reboots but does not update. I want to know what do I need to do to update. Please let me know!
Do you have CWM installed internally? That is what it meant by having a compatible recovery. You also need to update the gapps to the 20130813 version. Your best solution is to go to the Dummies guide linked in my signature and follow that for installing CM10.2. But skip the step about factory resetting if you want to keep you installed apps.
Sent from my SCH-i705 using XDA Premium HD app
leapinlar said:
Do you have CWM installed internally? That is what it meant by having a compatible recovery. You also need to update the gapps to the 20130813 version. Your best solution is to go to the Dummies guide linked in my signature and follow that for installing CM10.2. But skip the step about factory resetting if you want to keep you installed apps.
Sent from my SCH-i705 using XDA Premium HD app
Click to expand...
Click to collapse
Thanks for replying. I installed this about a year ago and I actually had to Google CWM to see what that was and I am not sure if I have that installed internally. I know I did something with an microSD card when I installed and there is no card in now. I'm still new at this as I haven't done anything to this tablet in about a year. I will check out the Dummies guide a little later but I want to know if I have to redownload the CM10.2 as well linked in the dummies since it was downloaded to the tablet when I tried to update, or do I just strictly follow the directions on the Dummies?
babysneak said:
Thanks for replying. I installed this about a year ago and I actually had to Google CWM to see what that was and I am not sure if I have that installed internally. I know I did something with an microSD card when I installed and there is no card in now. I'm still new at this as I haven't done anything to this tablet in about a year. I will check out the Dummies guide a little later but I want to know if I have to redownload the CM10.2 as well linked in the dummies since it was downloaded to the tablet when I tried to update, or do I just strictly follow the directions on the Dummies?
Click to expand...
Click to collapse
It is probably best to redownload the files per the guide. The only step to skip is to not factory reset per the guide. That way your installed apps still will be there.
Sent from my BN NookHD+ using XDA Premium HD app
leapinlar said:
It is probably best to redownload the files per the guide. The only step to skip is to not factory reset per the guide. That way your installed apps still will be there.
Sent from my BN NookHD+ using XDA Premium HD app
Click to expand...
Click to collapse
Thanks a lot for the help. I will do this as soon as I find my microSD! One more question for future reference, so how do I update from the device in the future just by downloading an update straight from my Nook? Sorry, that's what I tried to do in the first place and I thought that cyanogenmod would update everything when I checked in the settings and there was an update to download. Once again, I appreciate your help greatly and thanks!
Well, first of all there will be no more updates to CM10.2, only CM11. Secondly, updates to CM11 will not work from CM10.2 using the update procedure because it requires entirely different CWM and files. Once you have manually updated once to CM11, you can use the update procedure to update to a newer nightly or version of CM11. The key that was missing for you and caused the update failure was you missed a step in your original install and did not install CWM to internal memory. That is required for the update procedure to work.
Sent from my BN NookHD+ using XDA Premium HD app

[Q&A] [Nook HD/HD+][SD Install][4.4] CM11.0 (KitKat) Updated 08/05

Q&A for [Nook HD/HD+][SD Install][4.4] CM11.0 (KitKat) Updated 08/05
Some developers prefer that questions remain separate from their main development thread to help keep things organized. Placing your question within this thread will increase its chances of being answered by a member of the community or by the developer.
Before posting, please use the forum search and read through the discussion thread for [Nook HD/HD+][SD Install][4.4] CM11.0 (KitKat) Updated 08/05. If you can't find an answer, post it here, being sure to give as much information as possible (firmware version, steps to reproduce, logcat if available) so that you can get help.
Thanks for understanding and for helping to keep XDA neat and tidy!
Nook HD+ HDMI Video but no sound - bokbokan SD bootable
I have a Nook HD+ and I'm using bokbokan's cyanogenmod bootable SDcard image. When I connect an HDMI cable I'm getting video but no sound. Anyone else experience this or know how to fix?
link to bokbokan thread that I used to create the bootable SDcard image: http://forum.xda-developers.com/showthread.php?t=2583952
No Joy
Regardless of which build or method I use, nightly or otherwise, SD, EMMC, or Updating from within CM10, I've never been able to get CM11 working on my Nook HD+ 16GB. Each try ends in my device getting stuck on the cyanogenmod boot screen (revolving arrow). The only recovery is to flash back to CM10. Any ideas?
n122vu said:
Regardless of which build or method I use, nightly or otherwise, SD, EMMC, or Updating from within CM10, I've never been able to get CM11 working on my Nook HD+ 16GB. Each try ends in my device getting stuck on the cyanogenmod boot screen (revolving arrow). The only recovery is to flash back to CM10. Any ideas?
Click to expand...
Click to collapse
Which version of CWM are you using? It must be v6045 or newer.
Sent from my BN NookHD+ using XDA Premium HD app
leapinlar said:
Which version of CWM are you using? It must be v6045 or newer.
Sent from my BN NookHD+ using XDA Premium HD app
Click to expand...
Click to collapse
I'm using NookHDplus-CWM-6046-for-internal-memory-rev0-(07-13-14)
n122vu said:
I'm using NookHDplus-CWM-6046-for-internal-memory-rev0-(07-13-14)
Click to expand...
Click to collapse
The SD image in my original post works fine for me on an Nook HD+ 16GB.
http://forum.xda-developers.com/showthread.php?t=2583952
My only issue is that I get no sound when I connect HDMI out to my TV.
n122vu said:
I'm using NookHDplus-CWM-6046-for-internal-memory-rev0-(07-13-14)
Click to expand...
Click to collapse
Are you factory reseting with CWM after flashing the ROM?
Sent from my BN NookHD+ using XDA Premium HD app
leapinlar said:
Are you factory reseting with CWM after flashing the ROM?
Sent from my BN NookHD+ using XDA Premium HD app
Click to expand...
Click to collapse
Yes, doing a Factory Reset. Also have tried clearing and not clearing cache, neither seemed to have any effect.
Thanks for your attention. It looks like I've found a build that works. cm-11-20140804-SNAPSHOT-M9-ovation.zip installed and booted rather quickly. None of the other nightly or official/unofficial builds seem to have worked, but I'm up and running now.
Regards,
n122vu
Help
Ok so I managed to install cm-11-20140706-UNOFFICIAL-bok-ovation. Installation ran smoothly and everything was fine (kitkat running ok and I was able to go into main menu etc.), until I powered off the device. I remembered the display sort of paused for a brief moment and the device powered down. As I turned it back on, it boots back to the original factory rom.
I've lost my back up rom and cynoboot now only allow selection of either no.1 (boot from Stock ROM), or no. 4 (boot CWM recovery).
I have tried installing the newer ROM (cm-11-20140804-UNOFFICIAL-bok-ovation) but it says E: Can't Open /emmc /cm-11-20140804-UNOFFICIAL-bok-ovation.zip (bad) -tried downloading the file again with same result..
Out of desperation I tried all the menu functions from wiping and formatting to hard resetting it, but nothing happens. It can still boot to Stock ROM fine though. Any help to get this thing rooted with kitkat running is much appreciated..
Patience is the key ...
n122vu said:
Regardless of which build or method I use, nightly or otherwise, SD, EMMC, or Updating from within CM10, I've never been able to get CM11 working on my Nook HD+ 16GB. Each try ends in my device getting stuck on the cyanogenmod boot screen (revolving arrow). The only recovery is to flash back to CM10. Any ideas?
Click to expand...
Click to collapse
Patience. No, I'm not good at it either, but combined with the slower operations on the bootable microSD card, I had to wait about 15-20 minutes for the revolving arrow to stop. Touch the screen occasionally, so that the processor stays up to speed (I shouldn't think that necessary, but it stopped revolving when I touched the screen after about 20 minutes).
Noob Questions
I realize these questions will likely seem obvious to everyone, but I couldn't find an answer looking through the forum, so I figured I would ask before proceeding to try this;
The instructions say to download the SD Card Image - I see the links under "SD Card Images", but I also see similar looking links under "Cyanoboot Sources"
Example: SD Card Images: HD: sdcard-hummingbird-cm11.0-v1.img
Cyanoboot Sources: HD: u-boot-hummingbird-cm11.tgz
My question is are these the same thing? Do I need both? One or the other?
Maybe some helpful info: I have a Stock Nook HD 8gb running 2.2.0, never done anything to it other than the factory updates.
Thanks in advance.
Thanks for the great posts
I want to thank everyone for the outstanding work here that allowed a complete noob to take my stale 2 year old Nook HD from blah to WOW in a few simple steps.
I really worried about getting a good SD card, but I was able to exFat format an ADATA 64GB Class 10 card which then tested to 1.62 MB/s on Random Write 4KB (QD=32) on CrystalDiskMark (5 iterations, 50MB). Already owned it as I actually purchased it for the nook, but it seemed like it would not store on the external card.
I followed the instructions exactly as posted on page 1 of this thread and I have the following results: (All confirmed with Screenshots I hope will post)
Total space: 57.12GB! (dramatic improvement over factory Nook HD)
Up time: 18+ hours and going strong with NO forced restarts
Android Version: 4.4.4!
update installation steps
Hello,
I have the August update installed for the cm11 sd install on the hd+. Simple question:
What's the procedure to install the updated Rom(11/23)? Do I just boot to recovery and
flash the Rom? Or do I have to do some other things ( wipe? and/or flash gapps?).
Thanks
rjolbrich said:
Hello,
I have the August update installed for the cm11 sd install on the hd+. Simple question:
What's the procedure to install the updated Rom(11/23)? Do I just boot to recovery and
flash the Rom? Or do I have to do some other things ( wipe? and/or flash gapps?).
Thanks
Click to expand...
Click to collapse
If you mean the updated 11/22 version that bokbokan posted earlier, yes, just flash with no wiping.
Sent from my BN NookHD+ using XDA Premium HD app
is there an update to this version (HD: cm-11-20141122-UNOFFICIAL-bok-hummingbird)
I used the install process at http://forum.xda-developers.com/showthread.php?t=2583952 to install HD: cm-11-20141122-UNOFFICIAL-bok-hummingbird - Dev-Host | Android File Host, and the gap below that, and followed all the instructions below that. KK woks fine on my nook hd, except that I am unable to use kobo, as it can't find my connection to allow me to sign in, and also can't use another app because when I try to aces it's store for my previous purchases I get an SSL error. Is there any way to update this version of KK I installed, or is there a different way to do this so that I can update on a regular basis? Thanks
mitchellfox said:
I used the install process at http://forum.xda-developers.com/showthread.php?t=2583952 to install HD: cm-11-20141122-UNOFFICIAL-bok-hummingbird - Dev-Host | Android File Host, and the gap below that, and followed all the instructions below that. KK woks fine on my nook hd, except that I am unable to use kobo, as it can't find my connection to allow me to sign in, and also can't use another app because when I try to aces it's store for my previous purchases I get an SSL error. Is there any way to update this version of KK I installed, or is there a different way to do this so that I can update on a regular basis? Thanks
Click to expand...
Click to collapse
If you want to keep using this SD based kk, you have no choice but to wait for bokbokan to update to a new version. Other versions of kk will not work on the SD setup.
Sent from my BN NookHD+ using XDA Premium HD app
As Spock used to say, there are always possibilities
mitchellfox said:
Is there any way to update this version of KK I installed, or is there a different way to do this so that I can update on a regular basis? Thanks
Click to expand...
Click to collapse
There is Verygreen's SD-bootable variant (HD+ only): http://forum.xda-developers.com/showthread.php?t=2600572
cm_cache not on EMMC
Is there the option of moving the cm_cache off of the EMMC? My EMMC is trim bricked and doesn't work; I am trying to figure out how to move cm_cache to the SD card.
joe8mofo said:
Is there the option of moving the cm_cache off of the EMMC? My EMMC is trim bricked and doesn't work; I am trying to figure out how to move cm_cache to the SD card.
Click to expand...
Click to collapse
Search the forum for the term noemmc. Verygreen made an SD version of CM so it does just that for bricked emmcs.
Sent from my BN NookHD+ using XDA Premium HD app

If I want 4.4 on HD+ which way should I go?

I'm wanting to put 4.4 or what ever is latest stable on my HD+. I have a Mac so the win disk image tool won't do me any good.
Which thread should I look at? There are so many release and threads. I want to use the SD card for the new OS. Not to blow away my current Nook OS.
Thanks,
Steve
piperman7 said:
I'm wanting to put 4.4 or what ever is latest stable on my HD+. I have a Mac so the win disk image tool won't do me any good.
Which thread should I look at? There are so many release and threads. I want to use the SD card for the new OS. Not to blow away my current Nook OS.
Thanks,
Steve
Click to expand...
Click to collapse
I'm not sure there is a version of CM11 that can run on SD, but there are many CM10 -CM10.2 threads that give files and instructions.
Sent from my BN NookHD+ using XDA Premium HD app
leapinlar said:
I'm not sure there is a version of CM11 that can run on SD, but there are many CM10 -CM10.2 threads that give files and instructions.
Sent from my BN NookHD+ using XDA Premium HD app
Click to expand...
Click to collapse
With the CM11 install that I have seen on here, does it boot straight into 4.4 no Nook at all? If so what happens to my current data?
I don't mind if it runs 4.4 or was even looking at the CM12.1. I have an iPad Air that I mostly use, but love this Nook and have had it for a while, I figured that I would make use of it.
piperman7 said:
With the CM11 install that I have seen on here, does it boot straight into 4.4 no Nook at all? If so what happens to my current data?
I don't mind if it runs 4.4 or was even looking at the CM12.1. I have an iPad Air that I mostly use, but love this Nook and have had it for a while, I figured that I would make use of it.
Click to expand...
Click to collapse
If you run CM11 or CM12 it directly replaces the ROM and data already there. No stock is left. All data is wiped.
Sent from my BN NookHD+ using XDA Premium HD app
leapinlar said:
I'm not sure there is a version of CM11 that can run on SD, but there are many CM10 -CM10.2 threads that give files and instructions.
Sent from my BN NookHD+ using XDA Premium HD app
Click to expand...
Click to collapse
Actually either verygreen and bokbokan released sdcard builds of cm11 for ovation, but they were updated last november.
http://forum.xda-developers.com/showthread.php?t=2600572
There are no instructions for SD card install in verygreenÅ› thread, but I think you can follow the same procedure detailed in cm10.x sdcard instrucutions.
I did a CM11 install that is in leapinliar's post, was pretty easy to do.
If I wanted to update to CM12.1 or put twrp on what would I need to do?
piperman7 said:
I did a CM11 install that is in leapinliar's post, was pretty easy to do.
If I wanted to update to CM12.1 or put twrp on what would I need to do?
Click to expand...
Click to collapse
I think leapilar listed almost everything useful to nook hd(+) in his signature.
IIRC, I took these steps to have both recovery and rom in my ovation emmc:
1) create a micro SD card with a recovery (you probably did it already when flashed cm11)
2) Download a newer (cm12 compatible) recovery and copy to sdcard (I'm using emmc twrp 2.8.6.0 built by amaces but there are older builds compatible, including cwm)
3) flash recovery (it'll replace nook stock recovery with the one you're flashing. People says it may be more difficult to fix your nook in case you experience emmc issues. I've never had any issues so I can't tell)
4) reboot to newer recovery, wipe /data, /cache, /dalvik-cache and /system, then flash cm12.1 rom with cm12.1 gapps (cm12 gapps won't work in cm12.1 and vice versa)
PS: I'm afraid .img files aren't flashable via recovery. To flash 2.8.6.0 I used Flashify. You can get it in play store and use it if you are rooted. This will make the process a lot easier since you won't need to prepare an sdcard.

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