Database Users

[Q] Factory restore

I need a .img of the original rom, where can i find? Thanks

Aran83 said:
I need a .img of the original rom, where can i find? Thanks
Click to expand...
Click to collapse
You cant, every NST is unique and using an image from another NST will cause trouble for both you and the NST it came from.

Thanks, nook is bricked but I can read the main partition, which .img I install?
Sorry for my english.

Aran83 said:
Thanks, nook is bricked but I can read the main partition, which .img I install?
Sorry for my english.
Click to expand...
Click to collapse
There's no img you can install.
You can try booting n2T-Recovery (v0.2) from a SD card and see if that helps. (Do not write that image to your NST!)
If not, send me a PM and I'll try to help you out

Something else you can try:
1) Flash noogie.img to an sd card.
2) Hook up your nook to a pc via usb once it has booted, and you should see all the partitions exported there.
3) In one of those partitions (recovery maybe? I'm struggling to remember), there's a factory.zip, which you can then install using the "Install from zip" feature of clockwork mod.
If you go this route, you'll have to reflash your sd card with clockwork mod after you've extracted the factory.zip using noogie.
Seems like kind of a pain, but I just recovered my device using this.

Remains in the screen ROOTED FOREVER and i can't do anything

I think, for michaelwill's method, you need to have linux running. I suggest you to try ros87's suggestion.

if I use backup from nook of my friend?

Aran83 said:
if I use backup from nook of my friend?
Click to expand...
Click to collapse
That is not a good idea, since each NookTouch has a unique information to register. If you are thinking of full restore from your friend's image (1.8GB image), it will overwrite your unique information. In that case, you and your friend's devices cannot register to BnN (or just one device). People says the info is stored in /rom. If you want to know more, you need to dig more. Otherwise try factory reset suggested by ros.

herofmm said:
That is not a good idea, since each NookTouch has a unique information to register. If you are thinking of full restore from your friend's image (1.8GB image), it will overwrite your unique information. In that case, you and your friend's devices cannot register to BnN (or just one device). People says the info is stored in /rom. If you want to know more, you need to dig more. Otherwise try factory reset suggested by ros.
Click to expand...
Click to collapse
Correct!
Using a image from another NST is a very very bad idea!
There are a lot of stuff that's unique to your NST stored in /rom and in rombackup.zip on the Factory partition.
This includes:
Serial Number
Main Board Serial
Product ID
Manufacturing date
SHA hash of Private Key
Public Key in modulus form
WiFi Calibration file
Some unique binary file for your eInk screen
MAC Address
Battery Type
Duplicating the serial will make you or your friend unable to register with B&N
Duplicating / Faking the private/public key pair, will most likely make you unable to register with B&N (I'm currently testing this)
Duplicating a WiFi calibration can cause degraded WiFi performance
Duplicating that EPD vcom file (eInk screen).. well who knows
Duplicating the MAC will cause network troubles if used on the same network.
The wrong Battery Type (I've seen three different so far) can cause charging troubles, and will cause incorrect charge indication.
Don't go there!

NookRestore.img
Try writing NookRestore.img to an mSD card. (You can get a copy at my website: NootRoot)

Hard reset
I had issues rooting my NST and got stuck in a boot loop. After digging and digging through forums I finally discovered the secret to a hard reset. The instructions said to hold the power and the two bottom side buttons down together for over 20 seconds. That worked! My NST was back to when I pulled it out of the box. I then proceeded to re rooting. (my mistake was I did not upgrade the OS before rooting). My bad. Hope this helps someone recover from a stuck boot loop.
Good luck.

chucktate said:
My NST was back to when I pulled it out of the box.
Click to expand...
Click to collapse
No it wasn't, Factory Reset doesn't remove root files or system apps installed by root tools, it only clears custom apps and settings.
While you might think it's back to stock, there are still leftover files and changes in /boot and /system

ros87 said:
Correct!
Using a image from another NST is a very very bad idea!
There are a lot of stuff that's unique to your NST stored in /rom and in rombackup.zip on the Factory partition.
Click to expand...
Click to collapse
Hi, I've just found a way around this - it is possible to restore somebody else's .img file, provided you've backup up your rombackup.zip. Then after, using Noogie, you can overwrite rombackup.zip and the contents of it which are on a different partition. The only danger is that you would potentially overwrite battery type config file, as Nook has couple of them. I gave it a try on mine and it seems fine.

sokoow said:
Hi, I've just found a way around this - it is possible to restore somebody else's .img file, provided you've backup up your rombackup.zip. Then after, using Noogie, you can overwrite rombackup.zip and the contents of it which are on a different partition. The only danger is that you would potentially overwrite battery type config file, as Nook has couple of them. I gave it a try on mine and it seems fine.
Click to expand...
Click to collapse
That is correct.
Problem is that most people who end up in a state where Factory Restore doesn't work has usually managed to overwrite their partition tables and part of the /rom partition.
And at this point it is too late to backup rombackup.zip as it's usually fragmented and cannot be recovered by ext2 file recovery tools.
So.. do a full backup before you do anything to your NST

I found if you restore with holding the two lower buttons it will remove all rooted files.

Googie2149 said:
I found if you restore with holding the two lower buttons it will remove all rooted files.
Click to expand...
Click to collapse
Read post 13 by ros87!
ros87 said:
No it wasn't, Factory Reset doesn't remove root files or system apps installed by root tools, it only clears custom apps and settings.
While you might think it's back to stock, there are still leftover files and changes in /boot and /system
Click to expand...
Click to collapse
Go to my website, download nookRestore.img and write it to an mSD card, Erase and De register, Power Off, then insert mSD then power up, then follow on screen instructions!

[OT - Removed]

[OT - Removed]

Torimu.Joji said:
I'll update the website and post links to XDA.
Click to expand...
Click to collapse
Thank you sir!
By posting proper links you help ensure that people get the most recent software and information

Cloned Nooks (I'm a dummie)

Hey everyone,
I rooted my NST Glow for the first time about a month ago and I was an idiot and didn't take a back up first. In the process I managed to totally mess it up. It got so bad that it was bricked and wouldn't boot no matter what I tried. Eventually I decided to try taking a backup of my wife's NST with glow and restored that to my Nook. That worked and allowed me to do a wipe, then root it properly etc. So everything was working and seemed good to go.
Today I was rooting my wife's nook and in the process put it online. At some point it said that there was an authentication error and it rebooted the nook and wiped it to factory.
I restored her nook from the fresh backup I took and it is back up and running, however it is unrooted and offline. My guess is that I cloned her nook's ID to mine when I restored from her backup and now B&N thinks that our nooks are the same device and registered to two different accounts. Thus anytime hers gets online it will get wiped.
Is there any way to reset my Nook's device ID or w/e so that it is unique again? How do I fix this problem?
And yes I learned my lesson and take backups regularly now.

unfortunately mate , we dont have any method to recover thr Rom partition that have ur unique files like nooks ID and MAc address and serial and etc , so i think if u dont have any chance to find an backup for ur device , then noway mate
but , u can use one device for online purpose and other offline always and for ever until u got recover ur original Rom partition
sry for ur loss mate , but try to remember that u take backup or anything or ur nook just will be used offline only
good luck

speedman2202 said:
unfortunately mate , we dont have any method to recover thr Rom partition that have ur unique files like nooks ID and MAc address and serial and etc , so i think if u dont have any chance to find an backup for ur device , then noway mate
but , u can use one device for online purpose and other offline always and for ever until u got recover ur original Rom partition
sry for ur loss mate , but try to remember that u take backup or anything or ur nook just will be used offline only
good luck
Click to expand...
Click to collapse
You could always try using Noogie to get at the rom partition - the S/N and MAC address are just text files
down in the devconf subdirectory on the rom partition. Nothing special, except no line termination.
If I were doing this from linux/Ubunto, I would try something like this after booting Noogie and attaching the
nook to my laptop, and assuming that Ubuntu mounted the Noogie-presented rom partition as /media/ROM:
echo -n "XXXXXXXXX" > /media/ROM/devconf/SerialNumber
echo -n "XXXXXXXXX" > /media/ROM/devconf/DeviceID
echo -n "58611Axxxxxx" > /media/ROM/devconf/MACAddress
If you log into your account on www.bn.com, go to manage your Nook, and put the pointer over the nook in
question, it will show you the S/N registered to that particular device associated with your account.
Of course, you say that you re-registered the nook, but if you're lucky, it will show up as a different device
under the management window(since it probably presented a different S/N from the original). Just ignore
the device with the S/N that matches what's in your cloned ROM(that S/N belongs to your wife). Hopefully
the original is still showing up as another Nook, which will have your original S/N. Put that into the
SerialNumber and DeviceID files.
As far as the MAC address, other than the 58611A prefix, which you need to leave the same(it's the manufacturer
code), pick a different series of six hexadecimal digits that are different from what you already have.
The MAC address only needs to be different from any other device attached to the same WiFi router.
If you pick something at random, you know it'll be different from your wifes Nook, and you've got a good
chance that you won't match anybody else that you're sharing a Wifi router with(at home, or the BN store, etc).
They must be 6 hexadecimal digits, and I would keep any alpha characters uppercase. Or you could just
pick 010101
What do you have to lose? I'm just guessing that this will work, but at this point what other options do you
have?
PS: If you do try this, please keep us updated.

Sure you can fix the serial number and mac address but you can't recover the public key and private key hash you need to authenticate with B & N. Fixing the serial number and mac address will keep you from messing up your wife's B&N authentication and allow you both to be on the same WiFi access point at the same time. But its unlikely you'll get B&N Authentication to work with the native NST apps. But you might be able to install the Nook app from the Market and use that to read your B&N books.

straygecko said:
Sure you can fix the serial number and mac address but you can't recover the public key and private key hash you need to authenticate with B & N. Fixing the serial number and mac address will keep you from messing up your wife's B&N authentication and allow you both to be on the same WiFi access point at the same time. But its unlikely you'll get B&N Authentication to work with the native NST apps. But you might be able to install the Nook app from the Market and use that to read your B&N books.
Click to expand...
Click to collapse
So this has already been tried, and it's known that the public/private key is used
to identify the specific Nook(not simply used for comm encryption to the BN server)?
If it were being used to identify the Nook shouldn't there have to be a full private key
half, as opposed to simply the hash? The only full "piece" of a key that I see is
the public half of the key, which you wouldn't normally use to specifically identify a
device.
Even then, even if it's a device identifier rather than a pre-loaded SSL or comm pubkey
for connecting securely to the Nook server(s), do we know that B&N has matched that
key to the device S/N, and keeps that matchup in a DB somewhere?
If not, then it should be possible to create a new key. You may lose the original registration
info, but re-registering should be possible.
Has anybody actually tried this yet?
...
Hmm, I just diff'ed the Pubkey in the rom backups for my NST and NST Glow, and
they're different, which doesn't make sense if it's an SSL/Comm pubkey being
used to connect to the same B&N server(s).

Thanks for the responses guys. It looks like I have made an erroneous assumption. I stumbled across this thread which says that the Nook Color Tools causes the factory reset, and that is exactly what I was doing when her nook reset on me.
I assumed that it was because I put the nook online for the first time since restoring mine with her image and B&N detected that they had the same ID or something.
When I get a chance this week I will check the serials and stuff in the ROM partition on both the nooks and see if they are the same or if mine is still unique from hers. The B&N website is only showing one nook under my account but says it was registered Sept 2, 2012 (long before I rooted it) and it lists a serial number there, so I am hopeful that my nook is still unique, and if not I may play with it and see if I can return it to the original serial. If I lose the ability to sync to B&N that isn't a big deal since I only have one book on my account (I sideload all my books through Calibre).
I'll let y'all know what I find out.

Here's a Nook Tablet users experience with restoring the serial number and mac address. Bottom line is he couldn't authenticate with B&N after restoring the serial and mac. He ended up lucky and got B&N to replace it under warranty.

serial number can found in the NST original Box , or u can found it when u look in memory card slot
for Mac address , i dont know how , but u can use cheat one , for how to edit , add this info to Rom partition , i dont know
good luck

You can follow that: http://forum.xda-developers.com/showthread.php?t=2104145
I faced a same situation and now my nook become normal :victory:

thanmeo78 said:
You can follow that: http://forum.xda-developers.com/showthread.php?t=2104145
I faced a same situation and now my nook become normal :victory:
Click to expand...
Click to collapse
That thread tells you how to save your ROM partition before overwriting it with a backup from a different Nook and then replacing the ROM partition with your backup. Unfortunately, it appears the OP had already restored a backup of another Nook before saving his ROM partition so the procedure on that thread is unlikely to do any good at this point.

Yah, unfortunately I did not back up my own ROM partition before writing a new one. I tried putting in my serial and changing the MAC address, but as in the other thread I could not register with B&N as I'm assuming the private keys don't match my serial (as they came from my wife's nook). So unless someone figures out how to recover or generate a new private/public key pair that will work with B&N's servers, I'm stuck with a cloned nook.
It's ok though because I side load all of my books and don't need to have it online or anything. So, it is working just fine for my purposes at this point.

Can the NST with v1.2.2 be rooted?

I got my first ereader, a lightly used NST and am thoroughly delighted with how much easier it is to read than on my phone or laptop. I was hoping to remove some of the bloatware as all my books are sideloaded using Calibre, but my version is 1.2.2. I couldn't find any reference to this new version on the Nookmanager thread. Can I still root it with this version?
Additionally, I am finding it hard to organise and find my EPUBs on it. The shelf function requires manual selection, which will take a while for a lot of books. At the moment I'm just keeping 5-10 books at a time of what I'm actively reading, but ideally I'd like to have my whole collection on there. If I were to root it, are there any library apps which would group the books by tags? A bit like how Calibre does it?
If not, what workarounds have people with large collections on the NST used?

fsa259 said:
I got my first ereader, a lightly used NST and am thoroughly delighted with how much easier it is to read than on my phone or laptop. I was hoping to remove some of the bloatware as all my books are sideloaded using Calibre, but my version is 1.2.2. I couldn't find any reference to this new version on the Nookmanager thread. Can I still root it with this version?
Additionally, I am finding it hard to organise and find my EPUBs on it. The shelf function requires manual selection, which will take a while for a lot of books. At the moment I'm just keeping 5-10 books at a time of what I'm actively reading, but ideally I'd like to have my whole collection on there. If I were to root it, are there any library apps which would group the books by tags? A bit like how Calibre does it?
If not, what workarounds have people with large collections on the NST used?
Click to expand...
Click to collapse
1.2.2?! Are you sure it's an actual NST? There is nothing past 1.2.1 for the NST that I know. Look under Settings>Device Info>About Your Nook. The model number of the NST is BNRV300.

That is really odd. It definitely has the model no you mentioned and says v1.2.2. Now that you mention it, I can't find the 1.2.2. on the B&N software updates section of their website, but found a reference to it on another forum where a user says their NSTG updated to it automatically when on wifi this January.
Should I be worried?

fsa259 said:
That is really odd. It definitely has the model no you mentioned and says v1.2.2. Now that you mention it, I can't find the 1.2.2. on the B&N software updates section of their website, but found a reference to it on another forum where a user says their NSTG updated to it automatically when on wifi this January.
Should I be worried?
Click to expand...
Click to collapse
I don't know anything about software version 1.2.2. However, if you would like to try rooting it, I would start with this thread.
Minimal rooting - back to basics. If you can get a minimal root with those instructions, the other more "advanced" (or not) rooting tools should also work.

fsa259 said:
That is really odd. It definitely has the model no you mentioned and says v1.2.2. Now that you mention it, I can't find the 1.2.2. on the B&N software updates section of their website, but found a reference to it on another forum where a user says their NSTG updated to it automatically when on wifi this January.
Should I be worried?
Click to expand...
Click to collapse
I would not worry. In a pinch you could do a factory reset and return to the original firmware which is not 1.2.2 I'm sure. Then you could use the 1.2.1 update zip to get it ready for NookManager. If indeed B&N is pushing an update (I've not seen it and have used WiFi regularly) you can avoid WiFi until you've rooted with NM. If there is some kind of update it may involve security issues for those purchasing B&N books with their devices. That would explain why I have not seen it.

nmyshkin said:
I would not worry. In a pinch you could do a factory reset and return to the original firmware which is not 1.2.2 I'm sure. Then you could use the 1.2.1 update zip to get it ready for NookManager. If indeed B&N is pushing an update (I've not seen it and have used WiFi regularly) you can avoid WiFi until you've rooted with NM. If there is some kind of update it may involve security issues for those purchasing B&N books with their devices. That would explain why I have not seen it.
Click to expand...
Click to collapse
Thanks for your reply.
After creating a back up I attempted to root with NM and in the final screen everything had positive remarks except 'PackageInstaller not modified' and 'ModManager not available for 1.2.2'. I figured I needed these two, so I went through the deregistration and restore to factory settings and booted to NM to avoid connecting to wifi. Strangely, on the NM main menu, it still says the system is 1.2.2.
I'm not sure if I'm missing something. I'll try factory reset again, but I'm not sure how else to get back to 1.2.1

fsa259 said:
Thanks for your reply.
After creating a back up I attempted to root with NM and in the final screen everything had positive remarks except 'PackageInstaller not modified' and 'ModManager not available for 1.2.2'. I figured I needed these two, so I went through the deregistration and restore to factory settings and booted to NM to avoid connecting to wifi. Strangely, on the NM main menu, it still says the system is 1.2.2.
I'm not sure if I'm missing something. I'll try factory reset again, but I'm not sure how else to get back to 1.2.1
Click to expand...
Click to collapse
There are two distinct "factory" operations. The one you describe just deletes user info and settings.
The other one reimages the device from a hidden and protected factory image--that won't be 1.2.2. That's the one you want. One way to get there is by eight failed boot attempts. That's very tedious. There is another way involving holding one of the buttons down during boot. Let me see if I can find it.
Edit: power down. Power up and as soon as you get anything on the screen press and hold the two bottom buttons until the factory restore dialog appears.

nmyshkin said:
There are two distinct "factory" operations. The one you describe just deletes user info and settings.
The other one reimages the device from a hidden and protected factory image--that won't be 1.2.2. That's the one you want. One way to get there is by eight failed boot attempts. That's very tedious. There is another way involving holding one of the buttons down during boot. Let me see if I can find it.
Edit: power down. Power up and as soon as you get anything on the screen press and hold the two bottom buttons until the factory restore dialog appears.
Click to expand...
Click to collapse
Ah, now I understand, I didn't realise there were two different options. Thank you for this.
Unfortunately it has lead to something very strange: I held the two bottom buttons on restart, went through both prompts confirming if I want to factory reset. It went through the process and at the selecting WiFi screen I restarted to boot to NM which still says the system is 1.2.2! Could it be that the forced update to 1.2.2 also wrote over the protected factory image?
Edit: I found these instructions and am keeping my fingers crossed they work to get 1.2.1 back
https://sites.google.com/site/xcdguides/nook/nookregion

fsa259 said:
Ah, now I understand, I didn't realise there were two different options. Thank you for this.
Unfortunately it has lead to something very strange: I held the two bottom buttons on restart, went through both prompts confirming if I want to factory reset. It went through the process and at the selecting WiFi screen I restarted to boot to NM which still says the system is 1.2.2! Could it be that the forced update to 1.2.2 also wrote over the protected factory image?
Edit: I found these instructions and am keeping my fingers crossed they work to get 1.2.1 back
https://sites.google.com/site/xcdguides/nook/nookregion
Click to expand...
Click to collapse
Yes. That was going to be my next suggestion. I hope it works.

nmyshkin said:
Yes. That was going to be my next suggestion. I hope it works.
Click to expand...
Click to collapse
Thank you so very much for your help. 1.2.1 was installed successfully and rooting worked a breeze!
I found an old version of ES Explorer on here and I'm now just adding '.disable' to the apks as recommended on another thread here to optimise the NST.
Once again, many thanks!

Rooting with NookManager
The answer to the original thread question is "yes". See https://forum.xda-developers.com/nook-touch/general/nst-nstg-fw-1-2-2-update-t3785566

@nmyshkin ...
Its true there is a version 1.2.2 ... i just got a mailer for update ... specifies 29 June 2018 as the last date after which managing and purchases from the nook store will be blocked rescinded !!!
please respond on this thread ... HERE

Nook Color Tools--a warning!

I should know better, but how many times have you said that to yourself?
Whilst investigating the Nook Color Tools app (which I had never bothered with before) in order to get an alternate keyboard working, I managed to reset my NST
I have a backup from January of this year, but a lot has happened since then. Anyway, at least I have something to fall back on. The incident occurred when I was looking at the multiple "Settings" entries under "All Settings". One of those is a killer.
I'm sure there are safer ways to switch the keyboard out but I didn't look for them, so shame on me.

Me too! Did this yesterday but I had just rooted so I simply inserted the SD card and re-rooted it. I did have to sign in to B&N again though. All user settings and customizations were lost.
I clicked the second "Settings" menu item and it reset. The first "Settings" item was fine.
Off topic:
Yes. It's important to boot into NookManager and backup regularly when messing around. Also REMEMBER TO COPY THE BACKUPS TO YOUR PC or they will be overwritten by the new backups. (Connect the Nook via USB while booted into NookManager. Then you'll see the extra drive letter, on the PC, where the backup is stored.)
You might be able to rename the backups on the SD card so they're not overwritten but I believe you'd still have to connect to the PC to rename them first before restoring. Am I correct or do the renamed files show up in a list? (I'll try it later and report back.)

gggirlgeek said:
You might be able to rename the backups on the SD card so they're not overwritten but I believe you'd still have to connect to the PC to rename them first before restoring. Am I correct or do the renamed files show up in a list? (I'll try it later and report back.)
Click to expand...
Click to collapse
You may be able to rename files on the backup partition but NookManager doesn't have the innards to display a list of files for backups so you'd probably just end up making it mad. When I off-load a backup to my PC I put it in a folder whose name includes the date and add a little readme.txt file to the folder describing what I've done to that point. Then I just drag whatever backup I want back to the card after I've started up NookManager.
On the subject of NookColorTools... That app really has nothing to offer except the keyboard swap and much mischief can be wreaked with it. I've located a little app that just swaps keyboards. I didn't check to see if the keyboards have to be in /system/app to be recognized, but that's where I put mine. You can turn off all the status bar stuff in the app (unless you are constantly changing keyboards?!). Attached below.

nst glowlight starting up stops every time

I bought a used nst glowlight (bnrv350), I made a backup, and then I tried to root using glownooter, but had a limited success : I could not install google market or opera mobile.
So I tried to restore the backup, but after "read forever, your nook is starting up", nothing happens, the message just stays there. I can boot with the back button, but it does the same.
I then tried to restore the factory image several times, using all the methods I could find in the internet, but it does the same as above. It has been going on for 24 hours.
The problem might have originated when I could not use winimage in my windows 10 computer to make the backup, and I used windows xp in a virtualbox in my linux computer instead. I used also dd, but I am afraid I don't remember the exact order. The backup size is 426.8 MB.
I reverted back to windows 10 with win32diskimager, with the same result.
Can anything be done ?

sinlog said:
I bought a used nst glowlight (bnrv350), I made a backup, and then I tried to root using glownooter, but had a limited success : I could not install google market or opera mobile.
So I tried to restore the backup, but after "read forever, your nook is starting up", nothing happens, the message just stays there. I can boot with the back button, but it does the same.
I then tried to restore the factory image several times, using all the methods I could find in the internet, but it does the same as above. It has been going on for 24 hours.
The problem might have originated when I could not use winimage in my windows 10 computer to make the backup, and I used windows xp in a virtualbox in my linux computer instead. I used also dd, but I am afraid I don't remember the exact order. The backup size is 426.8 MB.
I reverted back to windows 10 with win32diskimager, with the same result.
Can anything be done ?
Click to expand...
Click to collapse
That backup is too large, I think. Should be more in the neighborhood of 250 MB? Have you tried the factory re-image where you just see the booting up screen and then hold down the two bottom hardware buttons until you get a prompt?
It's difficult--but not impossible--to damage the factory image unless you've been messing with the partitions. If that method does not get you there, consider making a NookManager card and trying to access the re-image routine from its menu.

Thank you for your reply. I just used nookManager. After 5 seconds, it said the backup was successful, but there was no backup in the card. Similarly, it said that rooting was successful, but when I removed the card, it did the same as before : "starting up..." and it stays there.
Do you have another idea ? I downloaded the 1.2.2 update from the b&n site. Can nookManager install it ?
PS: The nook was already 1.2.2
Yes, I used the two lower buttons trick.

sinlog said:
Thank you for your reply. I just used nookManager. After 5 seconds, it said the backup was successful, but there was no backup in the card. Similarly, it said that rooting was successful, but when I removed the card, it did the same as before : "starting up..." and it stays there.
Do you have another idea ? I downloaded the 1.2.2 update from the b&n site. Can nookManager install it ?
PS: The nook was already 1.2.2
Yes, I used the two lower buttons trick.
Click to expand...
Click to collapse
5 seconds is not enough time for NookManager to correctly make a backup. And, backups can only be seen on the card if you connect your NSTG to your PC while NookManager is running. Otherwise the partition is invisible.
It's hard to know since I have no experience with the NSTG. If it were an NST I would suggest that you perform the region change flash, but it's not clear if that will remove your light function or, indeed, if the flash is deep enough to rewrite the areas of your device that appear to be preventing boot. AFAIK there are no ROM images for the NSTG available. But there might be. Somewhere.
I guess if you have exhausted all the possibilities, rather than trashing the device I would try the region change (just flash the US firmware again--I assume that's what's on there already). It may or may not preserve the glowlight capability, but it might at least produce a functioning e-reader. But only as a last resort.
Edit: Hmm.... seems like I've been down this winding road before: https://forum.xda-developers.com/showpost.php?p=72551413&postcount=57
But I emphasize that this process worked for a plain NST, not the NSTG, so it is an absolute last resort (and might not work anyway because you could have a completely different situation). Next thing is to look at the innards of the 1.1 updater and see if Glowlight updates could be substituted...

O.K. So here is a thread that contains a link to an NSTG image and the instructions to write to your device (read down in the thread).
https://forum.xda-developers.com/showthread.php?t=2608815
What "may" happen: your device could end up with a mismatched serial number and or MAC address depending on how this image was made. There is information on this forum for correcting the MAC address. Just a disclaimer. I don't know. IF this is successful, you can then do a manual update to 1.2.2 and then root with the updated NookManager. I've checked the link to the image and it is still good. I got a file that is about 245 MB--seems about right. Presumably you use the image in place of your backup in the restoring process described in the thread.

I am very grateful for your help, but I am afraid I need more. The nook is now functioning and I might not have done it without your hints. As you suspected, the serial number and mac address have changed (I wrote them down before all this). I suppose that's why it did not automatically upgrade to 1.2.2 . Also the device says it's connected to the internet, but it doesn't seem to be.
I searched xda (nstg mac address, nstg serial number), but I didn't find anything meaningful to me (there are posts by Renate and by ros87 but too complex). Can you help, please ?

sinlog said:
I am very grateful for your help, but I am afraid I need more. The nook is now functioning and I might not have done it without your hints. As you suspected, the serial number and mac address have changed (I wrote them down before all this). I suppose that's why it did not automatically upgrade to 1.2.2 . Also the device says it's connected to the internet, but it doesn't seem to be.
I searched xda (nstg mac address, nstg serial number), but I didn't find anything meaningful to me (there are posts by Renate and by ros87 but too complex). Can you help, please ?
Click to expand...
Click to collapse
Oy.
I didn't think you would act so rashly with all my disclaimers. Well, it's done. I actually don't think the MAC address is a big deal unless you begin to have issues.
Did you actually manage to register? If so then the serial number must not currently be in use and the change you effected was deep enough to pass muster. If not....well battery life is said to be shorter for devices that have skipped registration.
Correcting the MAC address is described (sort of) here: https://forum.xda-developers.com/showthread.php?t=1483600
As far as I can guess it involves editing a hex file. Doable, but maybe not needed. There is no way to correct the serial number. It is heavily encrypted with private keys. Again, if you managed to register then this is all moot.
How are you judging lack of internet connectivity?

I was not given the opportunity to register and I don't care about registration, but I'd like to have connectivity. The link you just gave me is for the ros87's thread that I mentioned, and I don't know how to use it. So I suppose I cannot upgrade to 1.2.2 . Should I root the device ?
PS : ros87's last activity was 2 years ago
EDIT : I copied nook_1_2_update.zip in the device and it was installed. I have now 1.2.2

sinlog said:
I was not given the opportunity to register and I don't care about registration, but I'd like to have connectivity. The link you just gave me is for the ros87's thread that I mentioned, and I don't know how to use it. So I suppose I cannot upgrade to 1.2.2 . Should I root the device ?
PS : ros87's last activity was 2 years ago
EDIT : I copied nook_1_2_update.zip in the device and it was installed. I have now 1.2.2
Click to expand...
Click to collapse
You didn't answer my question about connectivity. Are you not able to make a connection? With only the stock device there is nothing to connect to other than B&N. What does it say about "Owner" in the Settings?
Yes, you should root. Be sure to use the NookManager update or it won't work.
Before we even think about the MAC address issue you need root access and some way to tell if you actually have an internet connection. That means some kind of functioning browser, etc.
Do you still have that weird backup? If so, keep it safe somewhere. You may want that someday.

I tried to download a book and I got this : Unable to download, Internal error...
I can ping the nook from the computer.
I will look into rooting the device in 2 or 3 hours and then post again. I suppose this is what you're referring to :
https://forum.xda-developers.com/nook-touch/development/nst-g-updating-nookmanager-t3873048
Thank you for your patience with me.

sinlog said:
I tried to download a book and I got this : Unable to download, Internal error...
Click to expand...
Click to collapse
There is an entire galaxy of mystery contained in that statement. Download from where? Download with what? Do you have an sdcard inserted for storage?

nmyshkin said:
There is an entire galaxy of mystery contained in that statement. Download from where? Download with what? Do you have an sdcard inserted for storage?
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Click to collapse
I meant to download a book from the home page of the nook, where it says New reads. I am still unrooted and I don't leave an sdcard inserted.

sinlog said:
I meant to download a book from the home page of the nook, where it says New reads. I am still unrooted and I don't leave an sdcard inserted.
Click to expand...
Click to collapse
Hmm... I'm surprised there are any books populating that section at all since the device is not registered. In any case, that is no test of connectivity since without registration the NSTG will spit out all kinds of generic messages about connections and failures if you attempt anything that requires access of B&N servers--like buying/downloading a book (which you can't do unless you are registered).

Rooted with nookManager updated. Opera mobile needs to be reinstalled. I can connect to the computer using es file explorer, so wifi is ok. BUT I can't use nookManager because I can't read the icon labels. I'll restore the backup tomorrow and I will try another rooting method. There are 2 more, I think : tiny and glownooter. Are there others ?

sinlog said:
BUT I can't use nookManager because I can't read the icon labels.
Click to expand...
Click to collapse
? Do you mean ADW Launcher? You can fix the icon label issue in the Settings. As I recall the default font color is white. That needs to be changed to black. The size can also be changed. Depending on what icon style you pick the label will either be on one line or, if longer, on two. LOTS of Settings in ADW. Don't write it off without spending some time working with it.

Sorry, I used glownooter. It's a lot like touchnooter, with which I am familiar. I still have to sign in to my google account and to install opera mobile. I'll be back when finished.

Opera mobile is installed and working. I still can't sign in to google but I can use yalp store and that's good. Thanks again, nmyshkin, you saved my nook glowlight.