When the Nook Tablet runs low on battery, it will turn off. Duh..
However, what happens when the battery gets too low? It goes into a "sleeping death" mode. I theorize this is caused by a lack of power management when the device is in sleeping condition.
Here is the related portion of my UART log.. Put in simple terms:wires hooked up internally to read what would be "BIOS" on a desktop or laptop.
Code:
fullcap0=0x2067 VFSOC=0x08f0 remcap=0x02e5
fullcap0=battery full capacity
VFSOC= Voltage for? System On a Chip- the value required for the device to operate
remcap= remaining capacity
These values are checked before the screen even turns on. So, if the Nook Tablet has a dead battery, the processor will initialize, then turn off before turning on the screen. The device appears to be totally dead.
I verified that a standard USB cable will charge the device even when it's completely off. I do not have a Barnes and Nobel cable currently, so I don't know if this applies.
The solution is to leave the device plugged in for 2 hours, then attempt to turn it on.
I hope this helps someone who would otherwise return a totally operational device.
I purposefully ran my nt down to see how low it would go and what happens when the battery runs out. I got it down to somewhere around 4% before it went black. I then plugged in the nt wall charger and tried turning it on. Nothing happened. I waited a few minutes and tried again. It was then flashing a message about critically low battery on the screen and to wait 15 minutes before trying again. It was probably 5-10 minutes later that it actually booted into android.
Just to clarify, it flashed red text on black screen when too low to power on fully.
nook tablet wont charge
I have the nook tablet and last night the battery died and brought up a screen that said "battery to low to power on, please connect your charger" so I connected the nook charger and the little "n" on the cable lit up, but the screen just keeps flashing (once a minute or so without me touching it) the battery to low message. Everytime the message pops up the "n" on the charger changes color from Orange to green. Left it to charge all night and this morning more of the same. Any thoughts? Thanks in advance.
16GB
8GB SD card
Rooted
Purchased at christmas
My friend's nook tablet had the same problem.
http://forum.xda-developers.com/showthread.php?p=23836518#post23836518
Even after leaving it plugged up with the nook charger over night, it would not boot. I guess I should have tried a standard micro usb plug.
I ran into the same problem a couple of daya earlier. I tried a standard mini usb charger but my tablet woulbnt boot. Then I tried b&n charger and cable. After around 20 minutes I found it booted and charging.
I noted that standerd mini-usb chargers outputs ampere are far lower than bn chargers. For example nokia charger : 1200mA, sony erricsson : 850 mA and b&n charger : 1.9 A. Does it have to do anything with this?
Sent from my Nook Tablet using XDA
Thanks for the responses. I contacted Barnes and noble last night and they seem to think that it is the cable. They are sending a new one. I will update when it comes in. Thanks again.
mamnun said:
I ran into the same problem a couple of daya earlier. I tried a standard mini usb charger but my tablet woulbnt boot. Then I tried b&n charger and cable. After around 20 minutes I found it booted and charging.
I noted that standerd mini-usb chargers outputs ampere are far lower than bn chargers. For example nokia charger : 1200mA, sony erricsson : 850 mA and b&n charger : 1.9 A. Does it have to do anything with this?
Sent from my Nook Tablet using XDA
Click to expand...
Click to collapse
The B&N cables are known to stop working after a while. Guess its built a little on the cheap side and the end that plugs into the nook is the problem as it is to heavy and so it bends the plug and causing it to snap off on the inside which of course is a bad thing. Some of the pins snap and thus causes problems.
My nook is doing the same thing. Thing is that im on my second B&N cord and my phone cord which usually charges it wont charge it either. The screen just say battery too low.. wait 15 minutes.
I'm wondering if making a bootable sd card will solve the problem.
Ended up taking mine to the b&n store after the new cable didn't help. They ended up replacing my NT all together.
bustedukulele said:
My nook is doing the same thing. Thing is that im on my second B&N cord and my phone cord which usually charges it wont charge it either. The screen just say battery too low.. wait 15 minutes.
I'm wondering if making a bootable sd card will solve the problem.
Click to expand...
Click to collapse
A regular micro sd cable will not charge the nook. The receptacles for it are set in deeper than normal and thus the reason for the extended microsd pins on the nook tablet charger.
Cubanluke88 said:
A regular micro sd cable will not charge the nook. The receptacles for it are set in deeper than normal and thus the reason for the extended microsd pins on the nook tablet charger.
Click to expand...
Click to collapse
I guess my question is if I make a bootable SD card is there a way for me to force my nook to restart through the computer?
bustedukulele said:
is there a way for me to force my nook to restart through the computer?
Click to expand...
Click to collapse
sorry for asking a question about a question... is your adb running ?
old_fart said:
sorry for asking a question about a question... is your adb running ?
Click to expand...
Click to collapse
No, I have not set up ADB on my computer. If I do so, can I force my nook to reboot using ADB?
Code:
adb reboot
Should do the trick.
Just wanted to post an update.... i made a bootable SD card and inserted it in my nook... one push of the power button had clockwork recovery up.
Once i had a ROM installed the battery read that it was full.
Thanks for your replies. I'm glad i don't have to replace it
Sent from my ADR6400L using XDA
Related
I recently received my fresh NT from the ebay sale, and yesterday had it running CM7, with CWM installed internally. Everything was fine with the world.
Today, I wake up and find it boot looping constantly.
- When plugged into USB, it boot loops constantly. As soon as the N screen disappears, it restarts. I can't even get it to turn off.
- When disconnected from USB, I can't even get it to turn on. Period.
- When disconnected from USB when the N screen is showing, it instantly shuts off.
- 8 Reboot trick doesn't work, booting onto a CWM or stock-flashing SDCard doesn't work, acclaim doesn't work.
Almost sounds like a dead battery, considering the instant shut-off when unplugged, but it can't charge because it's constantly trying to turn on. Any advice?
Leave it on the charger and don't touch it for about half an hour.
Sent from my Nook Tablet using Tapatalk
Unfortunately, it's degraded to the point that it won't even turn on -- plugged in or not. I'm going to go ahead and pass it off as a hardware failure and see if I can get an exchange.
mine is doing this , i didnt charge it last night , when i woke up it went to cynoboot showed 12 percent batt and now its looping just like what you said yours was , what is the end result ?
i've already taken the back off i have access to the batt connector im thinking about maybe rigging up a trickle charger to that directly also i dont have the BN charge cable im using a micro usb and its worked well so far, i did order a BN cable it should be home by the time i get home though , im guessing i need to find an alternative way to recharge this battery
id like to know if you got an exchange ? or if you still have the tablet ? im going to try a few other things too but if you still have yours and i figure it out ill pm it to you
solution
dude sorry to dump this on you years after wards , crack it open , flip it over to its back flip up the sd card cover take out the torx 5 screws , use a small flat head screw driver pop out the back tabs once its open , disconnect the battery and the other cable up top , i left em disconnected and tapped them with my volt meter , i saw a capp drain flat on the outside red and outside black lines, then after a few minuets reconnect the two cables , plug it into your power and leave it for 2 hours your now at screen of death and just need to charge the battery,
manually forced the device to reset , it keep running in circles and would never charge , just disconnect the batt man ...
mines on and at 20 % batt and charging ...
later
I have the same problem. Would letting it drained completely and recharge work? I don't have the right tiny screw driver for it. :crying:
I think the battery is still good. For me, It's able to get into CWM and install the latest cm-10.2-20130811-UNOFFICIAL-acclaim.zip. Just, when reboot, it goes into the endless booting "N" loop.
Thanks.
doublemhi said:
I recently received my fresh NT from the ebay sale, and yesterday had it running CM7, with CWM installed internally. Everything was fine with the world.
Today, I wake up and find it boot looping constantly.
- When plugged into USB, it boot loops constantly. As soon as the N screen disappears, it restarts. I can't even get it to turn off.
- When disconnected from USB, I can't even get it to turn on. Period.
- When disconnected from USB when the N screen is showing, it instantly shuts off.
- 8 Reboot trick doesn't work, booting onto a CWM or stock-flashing SDCard doesn't work, acclaim doesn't work.
Almost sounds like a dead battery, considering the instant shut-off when unplugged, but it can't charge because it's constantly trying to turn on. Any advice?
Click to expand...
Click to collapse
Had almost the same problem as you. Bought a Nook Color off eBay. Battery was discharged to 0%. I didn't have the original Nook Color charger cable so I thought I was fscked. I had a few microUSB chargers lying around. I used an old Motorola flip-phone charger to charge it back to life.
Get ANY microUSB charger, like for an old cellphone, or buy one (they're cheap off the streets). Plug it in and let it charge overnight. Do NOT under any circumstances press the power button or you'll have to restart the charging process. The next morning my Nook Color booted up (although it had only 18% charge) and everything was fine (poor seller sold it on eBay for parts, I got it for $28 in total LOL, but I knew it was fine).
sagirfahmid3 said:
Had almost the same problem as you. Bought a Nook Color off eBay. Battery was discharged to 0%. I didn't have the original Nook Color charger cable so I thought I was fscked. I had a few microUSB chargers lying around. I used an old Motorola flip-phone charger to charge it back to life.
Get ANY microUSB charger, like for an old cellphone, or buy one (they're cheap off the streets). Plug it in and let it charge overnight. Do NOT under any circumstances press the power button or you'll have to restart the charging process. The next morning my Nook Color booted up (although it had only 18% charge) and everything was fine (poor seller sold it on eBay for parts, I got it for $28 in total LOL, but I knew it was fine).
Click to expand...
Click to collapse
good score man , i by micro usb cables off amazon for 2.65$ shipped to the house , yea you can also get the torx 5 screw driver off ebay or amazon dirt cheap , if you want links let me know i will find a few for ya , i like to get stuff cheap but if you want it today you can get em at sears for a few dollars more ,
if you want links for torx 5 or usb cables that will work on the nook tablet / color , also you can get OEM from B&N for 9.99 i just ordered one from them a few weeks ago it works charms
cheers
So last night before I went to sleep, my NT had about 40% battery life left in it. I'm currently running the final alpha build of CM7. I've been experiencing really bad wifi loss issues and have kept the 'Never' option enabled under the wifi sleep policy (thinking that would help hold the connection).
I woke up to find the NT was turned off. Figured that was odd as I was only asleep for about 5hrs. I turned it on and then noticed it got into the OS and then died. I did see the battery icon was red briefly.
I then plugged it into the wall and it was boot looping. I saw the 'n' logo pop up, screen went black, 'n' logo, etc. etc.
After numerous attempts of holding down the power button for 20+ seconds, holding power+vol down for 10 seconds, plugging it with or without an sd card into the wall and computer, nothing is happening.
The computer does see something as I'm hearing the common connected/disconnected tone from the USB port. Now I'm noticing that plugged into the wall, the 'n' on the cable stays orange. It never turns green.
Did it go 'poof' in the night somehow?
[EDIT] Ok after leaving it plugged into the wall for about 15mins, it suddenly turned on but had a google framework FC error. Yeah, not sure what I should do at this point. It appears to be charging...
It's been noted by others that if the power level goes below 15% you mustn't turn the device off if you don't have the original charger nearby. If it dies you need to charge it with the original charger for a bit before it'll power back up.
I assume this means that you can't run it off the cable while you've got a completely dead battery. That kind of stinks but isn't too surprising, a lot of devices are like that.
So does that mean that if the device is <40% of battery I need to plug it in if I won't be around it for a while? Not sure I'm cool with that. Battery life was great all day yesterday but somehow it dropped 40% in under 5hrs while asleep.
I can't really say much as I haven't dealt with it personally. People were talking about it in a couple threads about the NT's charger and unique 12 pin cable.
Here's what I understand from what I've read:
You can run it until it's empty all you like. You'll just need to use the Nook's factory charger (or a compatible 2A charger with bridged D- and D+ pins) AND (this is the important one) the factory USB cable to charge it.
If you run it until it dies you have to charge it for a little while before it'll turn on again, BUT you have to use the original cord and charger. It won't charge off of a regular micro USB cable nor will it work if you're using a 2A or smaller charger that doesn't have the middle two pins bridges (the Apple UBS chargers won't work nor will your PC's USB ports, for example).
The NT will charge, albeit slowly, if connected with a third party cable or USB charger (without the data lines D- and D+ bridged), but not if the device's power has been depleted.
So I suspect something sucked up a lot of juice while you weren't using your NT. Not a huge deal, but definitely annoying. Plug it in for 15 minutes and you can get rolling again.... BUT only if you're using the original charger and cable. Lovely isn't it? It's not a huge problem but it is annoying. I wish you could at least use the device with a dead battery while plugged in.
I just mention the charger/stock cable thing because I'm sure someone will probably see this post in the future and may be having that particular problem resuscitating their NT.
Cool, yeah I don't specifically set out to run it down to zero but since the device is clean with minimal stuff running in the background, it's difficult to know when this might happen again. I assumed I'd wake up with like 20-25% battery left. The framework FC is also something I'm concerned about but maybe it was just a fluke.
Ah well, really do appreciate your input and I'll be sure to keep the stock cable/adapter on hand when I'm on the go.
Battery showed fully charged, I rebooted to do another CWM backup and then when it came back up it showed 84% charged. Lol. And this pic made me laugh even more. Time to get that lady from Poltergeist involved I think...
The Google Framework force close is typical of stock rooted NTs. I don't believe it ever did any harm to anything though. Just that it sometimes appears on reboot.
I'll ask one additional question as to not make another topic since it's related.
Opinions on battery calibration with the NT? That was one of the reasons I didn't charge it last night as I wanted to fully run it down and then fully charge it back up. Does the NT require this with a new rom install? That pic above shows the battery gauge clearly wasn't correct initially.
Your battery is draining overnight because wifi is running the whole time (as you stated in your first post).
Sent from my SCH-I500 using Tapatalk
ckevinwelch said:
Your battery is draining overnight because wifi is running the whole time (as you stated in your first post).
Sent from my SCH-I500 using Tapatalk
Click to expand...
Click to collapse
That's what I obviously thought of at first but it didn't drain nearly as much when I was using it throughout the day. The only thing I can think of is maybe the fuel gauge itself was wrong from the start, which refers back to my calibration question.
My GS2 has the sleep policy set to 'Never' as well and only loses maybe 7-8% after being asleep for around 7-8hrs and it certainly uses more juice in sleep due to the cell communication, etc.
Hey all for some odd reason once I plug in the usb cable, the NT just reboots and starts bootlooping on cyanoboot screen while loading emmc. if i don't have the usb cable plugged in it will boot just fine with no bootloops whatsoever. have any of you encountered this problem? I had cm10 running on it and thought it was a bad flash, reflashing didn't help and restoring to a cm7 backup didn't do the trick either...
any ideas?
Can you charge with wall socket plug and usb?
demetris_I said:
Can you charge with wall socket plug and usb?
Click to expand...
Click to collapse
determines on your definition of charging. since it keeps on bootlooping endlessly on cyanoboot is it considered charging?
when i had flashed your cm10 rom on the cyanoboot screen it says charging disabled. so i assume that means its not charging?
if i have the usb cable plugged in and i turn the NT off completely by holding the power button, it will shut off but then come straight back on since the usb cable is sitll plugged in.
boots fine without the usb cable, but once the usb cable is inserted it just instant reboots and the bootlooping on cyanoboot starts.
do you think it may be hardware failure?
ShinnAsuka said:
determines on your definition of charging. since it keeps on bootlooping endlessly on cyanoboot is it considered charging?
when i had flashed your cm10 rom on the cyanoboot screen it says charging disabled. so i assume that means its not charging?
if i have the usb cable plugged in and i turn the NT off completely by holding the power button, it will shut off but then come straight back on since the usb cable is sitll plugged in.
boots fine without the usb cable, but once the usb cable is inserted it just instant reboots and the bootlooping on cyanoboot starts.
do you think it may be hardware failure?
Click to expand...
Click to collapse
Cyanoboot screen saying charging disabled is normal.
Before we can say is a hardware failure, if you hold N can you stop Cyanoboot?
If you can stop it select recovery and leave it there 20-30 minutes.
demetris_I said:
Cyanoboot screen saying charging disabled is normal.
Before we can say is a hardware failure, if you hold N can you stop Cyanoboot?
If you can stop it select recovery and leave it there 20-30 minutes.
Click to expand...
Click to collapse
yeah i can stop it and select recovery and it will boot into recovery. this is assuming the usb cable is not plugged in. whatever state the NT is in, once the usb cable is plugged in, it will auto reboot and start bootlooping on cyanoboot.
i have already requested for a replacement from B&N, so i don't know if leaving it on for 20-30 minutes is an option at this point. i plan to wipe the thing completely using adam's total wipe before i send it back to them.
i am afraid that if i leave it on for 20-30 minutes the battery will die and i won't be able to boot from sd to initiate the total wipe by adamoutler.
ShinnAsuka said:
yeah i can stop it and select recovery and it will boot into recovery. this is assuming the usb cable is not plugged in. whatever state the NT is in, once the usb cable is plugged in, it will auto reboot and start bootlooping on cyanoboot.
i have already requested for a replacement from B&N, so i don't know if leaving it on for 20-30 minutes is an option at this point. i plan to wipe the thing completely using adam's total wipe before i send it back to them.
i am afraid that if i leave it on for 20-30 minutes the battery will die and i won't be able to boot from sd to initiate the total wipe by adamoutler.
Click to expand...
Click to collapse
You are right, is a hardware problem. Go get a replacement.
so i got the replacement a week or so ago, and this replacement is now having the same problem... what in the world is going on. i am using your rom with the sgt7 enhancements. is it possible that the governor being on hotplug may be the problem?
EDIT: changed it back to the default ondemand governor... the problem is still there... how is this possible.
All this make me think is a bad flash.
Check your rom for any corruptions
demetris_I said:
All this make me think is a bad flash.
Check your rom for any corruptions
Click to expand...
Click to collapse
i restored to the 1.4.2 factory stock image that i made with cwm when i first got my replacement nook. same problem exists... i think it has something to do with the usb port getting bent or something...
How you manage to bent a brand new usb port?
So, take it back again for a replacement.
demetris_I said:
How you manage to bent a brand new usb port?
So, take it back again for a replacement.
Click to expand...
Click to collapse
thats the plan lol... the replacement nook was a pre-certified one. this time around they say they are going to send me a brand new one....
Same Problem on nook tablet cm 10.1 acclaim
I had the same problem with my tablet after I allowed the battery to drain completely while using it. I have to mention in my situation I had lost the original charger that came with my nook and I've been using a wall charger from my cell phone. When I had the stock barnes & noble nook tablet plugged in I noticed that the device would say that it's not charging even though it really was. It just took a longer time to charge. More than likely i had a voltage difference between the two devices. I too was stuck in that cyanoboot loop where there was not enough power to load the operating system and cyanboot wouldn't indicated if my battery was in fact charging. I had two solutions to this; I left my endless loop on overnight and in the morning low and behold i was booted into cyanogenmod. My other solution was to leave the device off for a long period of time and then try again. Hopefully this helps anyone else out in the future.
16 gb Nook Tablet running sgt7 12/10 build on emmc.
Will only charge when unit is turned completely off.
Any suggestions?
I have the same problem, I am running 0.6 ROM. Any help greatly appreciated.
Sent from my Barnes & Noble Nook Tablet using xda app-developers app
I'm not sure that I've seen it fail to charge. But I have seen some oddities with each CM10 ROM I tried.
What I do is plug it in while the tab is asleep (The LED is usually green). Normally the tablet will wake and the LED will turn amber. Then I press the power button to put it back to sleep.
I say "normally" because with one ROM it doesn't wake when I connect the charger.
By "oddities" I mean I think the battery stats are getting wacked, but I haven't been able to isolate it, yet.
wellersl said:
I'm not sure that I've seen it fail to charge. But I have seen some oddities with each CM10 ROM I tried.
What I do is plug it in while the tab is asleep (The LED is usually green). Normally the tablet will wake and the LED will turn amber. Then I press the power button to put it back to sleep.
I say "normally" because with one ROM it doesn't wake when I connect the charger.
By "oddities" I mean I think the battery stats are getting wacked, but I haven't been able to isolate it, yet.
Click to expand...
Click to collapse
While the power is on with mine, the charging light is green no matter how low the battery.
When I turn off the power the light turns orange & the battery charges.
My nook tablet also will not charger after a completely clean install of the 12/10 ROM. It shows that it's charging, and the cable is orange, but it doesn't actually do anything unless I power it down completely after plugging it in. Also, the n button doesn't take me to the screen set as default home screen, but to screen 1 instead, all the way over to the left, but installed app icons are installed to the correct screen.
The no charging thing is a big deal for me. It makes this ROM basically useless since I can't use it while it's charging. That means you can forget about heavy use. Everything else about it is awesome but once it's dead I'm stuck reading books on my phone while I wait hours for it to recharge.
Update:
Not sure what caused it, but last night I accidentally shut my nook tablet down before plugging it in, which made it come back on, then I shut it down again. Since waking it this morning, it is plugging in and charging as intended. No idea why, but it does indeed seem to be working fine now, other than the previously mentioned home screen issue.
Try a new cable.
mnosugref said:
16 gb Nook Tablet running sgt7 12/10 build on emmc.
Will only charge when unit is turned completely off.
Any suggestions?
Click to expand...
Click to collapse
Between my kids and me totaling two cables already. I ended up duct taping around the 3rd cable so that it would fill the gap between the surface of the table and plug which made it more solid. I cut of square so to see the nook charging led. I would try plugin in from in store cable or someone else that has a nook if it would eliminate that as a possibility.
imsoenthused said:
My nook tablet also will not charger after a completely clean install of the 12/10 ROM. It shows that it's charging, and the cable is orange, but it doesn't actually do anything unless I power it down completely after plugging it in. Also, the n button doesn't take me to the screen set as default home screen, but to screen 1 instead, all the way over to the left, but installed app icons are installed to the correct screen.
The no charging thing is a big deal for me. It makes this ROM basically useless since I can't use it while it's charging. That means you can forget about heavy use. Everything else about it is awesome but once it's dead I'm stuck reading books on my phone while I wait hours for it to recharge.
Update:
Not sure what caused it, but last night I accidentally shut my nook tablet down before plugging it in, which made it come back on, then I shut it down again. Since waking it this morning, it is plugging in and charging as intended. No idea why, but it does indeed seem to be working fine now, other than the previously mentioned home screen issue.
Click to expand...
Click to collapse
i am having a similar issue, but my cable's led is always green no matter if the tablet is on or off. already tried a different cable and the same issue. also tried a different ac adapter, still the same thing. i wonder why.... any ideas?
UPDATE: tablet does charge just fine when it is off, however the LED is still green while the tablet is off. Weird... hard to say if its software or hardware issue now...
I bought three nook tablets, put NT-CWM-SD on a sd card then installed sgt7-10-20121209-meghd00t-acclaim on all three.
All three ran great installed many apps on each one. Once all three battery drained none of the tablets turn back on. The N on the usb charger is green and has been plugged in for 24 hours.
One known/reported issue with many recent CM10 builds is the NT while asleep will not detect USB cable insertion and kick into charging mode; one would have to wake it up with the power button or "N" button for it to go into charging mode (afterward one then put it back to sleep with power button and it will stay in charging mode).
I suspect your problem might have the same underlying root cause.
The only "shot in the dark" thing I can suggest trying is to stick in a bootable SD card (e.g., your CWM SDcard), then insert the powered USB cable -- hopefully with luck that would jolt the NT to boot up and go into charging mode. Please provide feedback on whether this works.
I would also suggest that you report this on the SGT7 development and CM10 support threads -- so that other CM10 users know not to ever let their NT battery completely drain.
If it's anything like mine you cannot plug it in to charge while it's in standby. The "n" turns green right away. I have to "wake it up" and then it starts to take charge. ("n" turns orange)
Edit: LOL! Digixmax posted while I was writing!
asawi said:
...
Edit: LOL! Digixmax posted while I was writing!
Click to expand...
Click to collapse
Great minds think alike
Joke aside, I am now really concerned -- previously it had not occurred to me that the problem the OP reported is a logical and fatal corollary of the problem you/I/others had seen/reported.
If the bootable cwm doesn't do it, try making a bootable cm7 (this rom didn't have the bug)
NT no longer charging or waking up
baberswallet said:
I bought three nook tablets, put NT-CWM-SD on a sd card then installed sgt7-10-20121209-meghd00t-acclaim on all three.
All three ran great installed many apps on each one. Once all three battery drained none of the tablets turn back on. The N on the usb charger is green and has been plugged in for 24 hours.
Click to expand...
Click to collapse
I experienced this type of problem a few days ago on my NT. I replaced my charging cable and it started working fine.
nigelshea said:
I experienced this type of problem a few days ago on my NT. I replaced my charging cable and it started working fine.
Click to expand...
Click to collapse
Could it maybe be that you need to force a reboot or reset or whatever by holding the PowerOn and N keys at the same time? For a 20 second count on my NT 16GB.
It would be great to hear back from the OP if any of the above suggestion works.