Red light of death after Antutu Benchmark - Nexus 4 Q&A, Help & Troubleshooting

The title pretty much explains it.
My N4 died on me today after running an Antutu Benchmark. I was running on Android 4.4 with the latest Fauxkernel (v29).
I can't boot it up anymore without the charging cable plugged in. When the charging cable is plugged in, the LED flashes red once, the display turns on and shows me the battery charging indicator and turns off just a couple seconds later also with the LED flashing red once. If I attempt to turn it on, the Google sign appears but the phone turns off immediately after that and once again, say Hi! to the red LED.
Pretty much tried everything so far, charging my battery, getting into the recovery menu, pushing down the power+VOL Up buttons for 60 seconds, etc. Nothing helped.
Maybe you guys know any way to fix it? I don't wanna open my device nor replace the battery if possible.
Thanks in advance.

2 ways to fix it. first, leave your phone on the charger for 3-4 hours. thwn try to boot it into the bootloader and press turn off the phone. let it charge further. if that doesnt work, remove the back cover, remove the battery, then clip the battery back in. the second method works 100%.

simms22 said:
2 ways to fix it. first, leave your phone on the charger for 3-4 hours. thwn try to boot it into the bootloader and press turn off the phone. let it charge further. if that doesnt work, remove the back cover, remove the battery, then clip the battery back in. the second method works 100%.
Click to expand...
Click to collapse
I can get into the bootloader but once I select power off, the phone just turns on again and shows me the battery charging indicator. Not sure if it's supposed to be like that but the indicator is completely filled so that would probably mean the battery is full.
Not sure if I have the right screwdrivers to open the back.

xSalamanderman said:
I can get into the bootloader but once I select power off, the phone just turns on again and shows me the battery charging indicator. Not sure if it's supposed to be like that but the indicator is completely filled so that would probably mean the battery is full.
Not sure if I have the right screwdrivers to open the back.
Click to expand...
Click to collapse
the reason for rlod is that the phone thinks that it is under 0% battery. leave it on the indicator that is filled, thats a good start. when that filled indicator starts the reguler behavior that it looks like its filling(up and down), thats when your phone will be fixed. leave it charging for a few hours.

simms22 said:
the reason for rlod is that the phone thinks that it is under 0% battery. leave it on the indicator that is filled, thats a good start. when that filled indicator starts the reguler behavior that it looks like its filling(up and down), thats when your phone will be fixed. leave it charging for a few hours.
Click to expand...
Click to collapse
Alright, I'll try that out. It's kinda annoying though that the display turns on every few seconds and turns off again but if it's going to work later that'll be worth it. Thanks alot!

if worst comes to worst, remove the battery and plug the battery back in. this will "reset" the battery(like a normal battery pull for devices with a removable battery).

seems the post may drive users a mis-understanding to AnTuTu Benchmark, I will ask our engineer to double check.

Related

Charging problem ..

(Bare with me, this IS wm6 related)
Okay, so i got this qtek 9090 from a trade online, and the owner pointed out that he had used it for some time now and it worked without problems.
However that seems not to be my experience. At first I was a little worried that it did not came with a charger.. Only a USB cable. No worries i thought, I will just charge it through USB. Now I have had some experiences where phones wouldn't charge from some of my computers, apparently because of some boards that put out lower amps than others. However I knew atleast one computer should have no problem charge ordinary cell phones.
So i plugged it in, and to my worries the battery kept going down... Untill the phone was dried from power and everything got lost again.. and again.. and again.. It seemed a little odd that it apparently deleted everything each time, since the backup battery indicated 100%.
So at last it went into flightmode and I shut it down with the powerbutton and let it be connected.. The first many hours nothing happened.. But suddenly, when i did an occasional check, it said 3% battery. I went to sleep and the next morning it was fully charged. I used it all day in school and it held its power real fine.
Now I got the feeling that this probably was caused by the low amp output from the computer, making it unable of charging to the extend where the phone would still be able of running whilst charging. So i figured i would order a 220v (the powercurrent here in Denmark) -> 5v USB that outputs 700mA, to make a quicker charge.
Well, to day I was gonna receive that adapter, and since I'd read that the wm6 apparently draines the battery some bit, I waited untill today to upgrade to wm6.
I upgraded and everything truely runs quick and stable. But when i recieved the adapter and plugged it in, i was horrified. The power kept going down, as I had experienced when it was plugged into USB.
Now my girlfriend really wanted to play bejeweled on this thing, so she did and then shortly afterwards we took a few hours nap. I had her plug it in the new adapter to charge it. When i woke up i saw the screen blinking.
I could se it was rebooting over and over again, as it had done the first time it completely lost power..
Now besides that extremely annoying charging problem, I now had another concern....
The boot screen shows NONE next to the R and the G.
Next to the D is the wm version displayed.
Any help would be greatly appreciated.
red LED?
Hm.. By doing a hard reset it shows numbers next to R and G again.
It continuely reboots, display boot screen, shuts down, LED is red, reboots, displays boot screen, shuts down, LED is red again and again.
If i hard reset it some times it will at one point stay off, but the LED still lights red.
And now I question wether 700mA is even enough for charging the BA?
1. Higher power given by power supply does not mean, you will get faster charging
2. If you use WM5/WM6 and have Bluetooth turned on, device turns on every few minutes (bug/feature of the driver needed to keep Bluetooth running: look for BigMike's fix for more information). If your deivce is set up to turn off after long time (for ex. 5 mins), battery might drain out in half a day.
3. Check power settings (delays for device power down etc.)
4. In WM6 be sure, that audio manager is not running (prevents device from deep sleep, allows only screen shutdown)
5. If battery shows up 100% and after disconnecting device discharges in less than 2h being turned on all the time (wifi, bt, phone, screen all the time turned on) it means, that battery might be worn. Consider exchange.
R and G showing NONE is normal in WM5/WM6 because of bug (unfixable for now) in the device and it's incomatibility with this OS: after turning on from power down (taking battery out or total discharging) make soft reset just when R NONE G NONE shows up on the screen. Everything will be normal.
jakubd said:
1. Higher power given by power supply does not mean, you will get faster charging
2. If you use WM5/WM6 and have Bluetooth turned on, device turns on every few minutes (bug/feature of the driver needed to keep Bluetooth running: look for BigMike's fix for more information). If your deivce is set up to turn off after long time (for ex. 5 mins), battery might drain out in half a day.
3. Check power settings (delays for device power down etc.)
4. In WM6 be sure, that audio manager is not running (prevents device from deep sleep, allows only screen shutdown)
5. If battery shows up 100% and after disconnecting device discharges in less than 2h being turned on all the time (wifi, bt, phone, screen all the time turned on) it means, that battery might be worn. Consider exchange.
R and G showing NONE is normal in WM5/WM6 because of bug (unfixable for now) in the device and it's incomatibility with this OS: after turning on from power down (taking battery out or total discharging) make soft reset just when R NONE G NONE shows up on the screen. Everything will be normal.
Click to expand...
Click to collapse
AFAIK the lower the mA output, the slower the charge period.
I have had wifi, bluetooth, beam off. I've set shutdown to 2 minutes. I've set it to low brightness and etc.
As i mentioned it had no problems going a whole day of usage in school.
Didn't know about the bug in wm6 that makes only the screen shut off, but at the momemt i can't even boot the device, apparently because it has no batterypower. And having it connected to the charger makes no real difference (other than it will display the bootscreen and perhaps even the Windows Mobile welcome screen thing, for a few seconds.. then go dead again.)
I've had it in the charger for about an hour or two, still not enough power to boot it up.
It feels like it's just not charging sometimes.. And other times it will charge just fine.
Found out about the reset to solve the NONE issue, but i still don't know what it means that its LED is red all the time?
Even 500mA is enough for sure, as charging from USB works fine.
Device will shut down soon after turning on if there is not enough power in battery, even it if is charging. Leave it charging (amber led on the right) for some time. RED led means low battery and no charging (AFAIR).
jakubd said:
Even 500mA is enough for sure, as charging from USB works fine.
Device will shut down soon after turning on if there is not enough power in battery, even it if is charging. Leave it charging (amber led on the right) for some time. RED led means low battery and no charging (AFAIR).
Click to expand...
Click to collapse
Hmm, i see. I just don't understand why it's not charging then :/
trylleklovn said:
Didn't know about the bug in wm6 that makes only the screen shut off
Click to expand...
Click to collapse
This is not a bug - thanks to this you can still listen to your music keeping device with screen turned off, when you don't need it to spare battery.
trylleklovn said:
Found out about the reset to solve the NONE issue, but i still don't know what it means that its LED is red all the time?
Click to expand...
Click to collapse
Red LED (right one) means low battery, no charging. To charge this led must be amber. Details - you must look for manual.
jakubd said:
This is not a bug - thanks to this you can still listen to your music keeping device with screen turned off, when you don't need it to spare battery.
Red LED (right one) means low battery, no charging. To charge this led must be amber. Details - you must look for manual.
Click to expand...
Click to collapse
Okay.
It's odd still. When i connect the charger the right LED starts to light red.
If it means that its not charging, there must be something wrong, since it only happens when connecting the charger..
it can be amber or red. Those are different colors and meaning.
You can confirm it charges touching the battery - it becomes slightly warm after some time.
jakubd said:
it can be amber or red. Those are different colors and meaning.
You can confirm it charges touching the battery - it becomes slightly warm after some time.
Click to expand...
Click to collapse
I KNOW that, but it is not going amber. It stays red all the time.
Found this thread that discusses a similar problem; http://forum.xda-developers.com/archive/index.php/t-233782.html
Apparently it shows RED light all the time if the battery is dead.. However i hardly doubt that the battery, which could power the phone just fine for and entire day, should be dead.
However, one suggestion in the thread was to take out the battery for some time and then try again. So I will do that for now.
Behavior has changed a bit now..
The LED is still red when i connect the charger. However, if i try to turn it on following happens:
Boot Screen shows for a couple of seconds...
Windows Mobile startup screen appears and the LED changes to orange/amber..
After a few seconds the screen turns black and the LED changes to red again...
And then after a few more seconds the boot screen appears again and everything is repeated, over and over.
If I disconnect the charger the boot screen appears, the wm startup screen appears, this time with a flashing red LED.. shortly after the phone turns off.
trylleklovn said:
Behavior has changed a bit now..
The LED is still red when i connect the charger. However, if i try to turn it on following happens:
Boot Screen shows for a couple of seconds...
Windows Mobile startup screen appears and the LED changes to orange/amber..
After a few seconds the screen turns black and the LED changes to red again...
And then after a few more seconds the boot screen appears again and everything is repeated, over and over.
If I disconnect the charger the boot screen appears, the wm startup screen appears, this time with a flashing red LED.. shortly after the phone turns off.
Click to expand...
Click to collapse
I've seen this problem before. The charger is not putting out enough power to both charge and boot the BA. So what happens is that it starts charging enough to start boot, but as soon as it has enough power to start the boot, it immediately drains it by starting to boot with screen at full brightness.
What I do in this case is to try to catch it just as it starts to boot and turn the backlight off by holding down the power button for 5 sec. This turns off the backlight so there is less drain and the thing can boot up and start charging.
All in all, its a pretty stupid bug but what the hell, there is a solution to it.
Good luck.
motisu said:
I've seen this problem before. The charger is not putting out enough power to both charge and boot the BA. So what happens is that it starts charging enough to start boot, but as soon as it has enough power to start the boot, it immediately drains it by starting to boot with screen at full brightness.
What I do in this case is to try to catch it just as it starts to boot and turn the backlight off by holding down the power button for 5 sec. This turns off the backlight so there is less drain and the thing can boot up and start charging.
All in all, its a pretty stupid bug but what the hell, there is a solution to it.
Good luck.
Click to expand...
Click to collapse
This seems to work atm. (just a few seconds since it successfully booted)..
Does this mean that the device really cant charge if its not "on" ?
(I can see its booted and the LED is now orange. If only it will stay this way untill it has been recharged further ))
trylleklovn said:
This seems to work atm. (just a few seconds since it successfully booted)..
Does this mean that the device really cant charge if its not "on" ?
(I can see its booted and the LED is now orange. If only it will stay this way untill it has been recharged further ))
Click to expand...
Click to collapse
It can charge when it is off. BUT... When its off, its not really off... It has to finish booting and then you can turn it off. Then it will charge faster as it only has minimum drain on the battery. As I said before, its a stupid design.
motisu said:
It can charge when it is off. BUT... When its off, its not really off... It has to finish booting and then you can turn it off. Then it will charge faster as it only has minimum drain on the battery. As I said before, its a stupid design.
Click to expand...
Click to collapse
Well we can certainly agree on that
So does the phone also basicly use to much power to be used and charged at the same time? Which would explain why it seemed to lose power even though it was connected to the charger.
Although it still doesn't add up for me, as at one point i was playing a game on it, while charging and then it charged real fast, where you would expect it to use more power
Oh well, if only it keeps charging now i'll be glad
trylleklovn said:
Well we can certainly agree on that
So does the phone also basicly use to much power to be used and charged at the same time? Which would explain why it seemed to lose power even though it was connected to the charger.
Although it still doesn't add up for me, as at one point i was playing a game on it, while charging and then it charged real fast, where you would expect it to use more power
Oh well, if only it keeps charging now i'll be glad
Click to expand...
Click to collapse
I have found that if you only use the USB cable to charge, it takes much longer (if at all) to charge if it is on. Thats why I bought cradles that have external power suppies as well as the USB sync cable. With this configuration, it gets to full charge in about 90 minutes.
Hm.. yeah.. I let it charge for some time, until it shut down and the LED changed to red again.. The same thing has happened about 3 times now.. If I try to navigate it with the brightness off it will shut down after a few clicks..
Seems like either the battery is completely dead or it's simply not charging.. :/
Think i have to buy a new battery and a cradle, although i didn't really want to spend money on this phone as i got it virtually for free (through a trade of a w810i)
trylleklovn said:
Hm.. yeah.. I let it charge for some time, until it shut down and the LED changed to red again.. The same thing has happened about 3 times now.. If I try to navigate it with the brightness off it will shut down after a few clicks..
Seems like either the battery is completely dead or it's simply not charging.. :/
Think i have to buy a new battery and a cradle, although i didn't really want to spend money on this phone as i got it virtually for free (through a trade of a w810i)
Click to expand...
Click to collapse
Get it to orange and then push the power button (short push) to turn it off (not long push which only turns off the backlight). Then let it charge for an hour or 2 (or even all night). By then, it should work OK.
motisu said:
Get it to orange and then push the power button (short push) to turn it off (not long push which only turns off the backlight). Then let it charge for an hour or 2 (or even all night). By then, it should work OK.
Click to expand...
Click to collapse
Yeah, i tried that. As soon as i press the power button it goes to red again.
Update..
A litte update (i might as well document everything I find out here, if anyone should run into a similar problem).
Now, I've had the device connected to the charge for some time now.
What happens is that the device boots up, automaticly dimms down to no light (since i once had hold down the power button, to dimm down light).
Then it boots up, and i can see everything running.
I can navigate to the battery status menu, which shows
Battery: 0% (charging)
Backup battery: 25%
After a few minutes the device shuts down, and the LED goes red again. But after about a half a minute it will try to boot up again, and it goes through everything again.
What I've noticed is that the backup battery slowly increases, and while im writing it has gone all the way to 75%. The good thing about this completely automatic procedure is that it apparently slowly charges, at least, the backup battery.
My theory is that the backup battery has first priority in the system, so that the regular battery wont charge untill the backup battery is up. And since the backup battery can't apparently be used for actualy powering the system, the system will continuesly reboot because of lack of power, theoreticly untill the backup battery reaches 100% and it starts to charge the regular battery.
The whole problem seems to be cause by some charging malfunction, so that both batteries has been completely discharged. I hope that by letting it continue to reboot, charge, reboot, charge, etc. it will revive the battery.
I will return with more info tomorrow.
Any suggestions are still greatly appreciated.

Flashing red led of death

Hi everyone, yesterday I took my G1 from my pocket (after using it normally for some hours) and it was turned off. I thought the battery was dead (I left it at about 20% charge) so I tried to turn it back on and surprise...no vital signs at all. The phone didn't turn on, and the led was dead. After losing half of my hair, I tried removing the battery and placing it back. Now the phone behaves like this; when I press the power button, as long as I keep it pressed the led flashes red and that's it. When I stop pressing the power button the led stops flashing. When I plug the usb cable, the led gives a solid red and stays like that forever.
Please someone tell me it's just a screwed up battery...please
Neuromansa said:
Hi everyone, yesterday I took my G1 from my pocket (after using it normally for some hours) and it was turned off. I thought the battery was dead (I left it at about 20% charge) so I tried to turn it back on and surprise...no vital signs at all. The phone didn't turn on, and the led was dead. After losing half of my hair, I tried removing the battery and placing it back. Now the phone behaves like this; when I press the power button, as long as I keep it pressed the led flashes red and that's it. When I stop pressing the power button the led stops flashing. When I plug the usb cable, the led gives a solid red and stays like that forever.
Please someone tell me it's just a screwed up battery...please
Click to expand...
Click to collapse
Probably bad battery. It is certainly worth it to at least try another battery -- they're dirt cheap anyways, or better yet, BORROW one.
* Solid green (when connected to the power adapter): The battery is fully charged.
* Solid red (when connected to the power adapter): The battery is charging.
* Flashing red: The battery is low and needs to be charged.
* Flashing green: There is a new notification.
Neuromansa said:
Hi everyone, yesterday I took my G1 from my pocket (after using it normally for some hours) and it was turned off. I thought the battery was dead (I left it at about 20% charge) so I tried to turn it back on and surprise...no vital signs at all. The phone didn't turn on, and the led was dead. After losing half of my hair, I tried removing the battery and placing it back. Now the phone behaves like this; when I press the power button, as long as I keep it pressed the led flashes red and that's it. When I stop pressing the power button the led stops flashing. When I plug the usb cable, the led gives a solid red and stays like that forever.
Please someone tell me it's just a screwed up battery...please
Click to expand...
Click to collapse
Leave it to charge for 30 minutes or so, then try to power on. should be okay
better to charge from ac power if u can
Its possible your charger could be faulty.
I have the same problem, has anyone found a solution?
Try leaving it charge for a good hour, or just go out and try a new battery, could just be dead.
Sent from my Xoom
sometimes if a battery gets to low it wont even charge... not just for phones but cameras too and so on..... iv had to do this to cell phones and cameras.... take a usb cord you dont care about and cut it and expose the red and black wires..... look for the positive on your battery and negative, usually its marked, how positive to positive and negative to negative for 30 seconds to a minute while its plugged into the computer then, pop the battery back into the phone and try to charge..... everytime iv had to do this for a freind or something of my own the battery has lasted over a year after with no problems.... just a suggestion
Thanks for the suggestions. I had already ordered a new battery and the phone boots up with it but it won't charge on or off and usb isn't recognized either. I tried wiggling the plug around to see if it was some kind of loose connection but it doesn't appear to be the case. I may take the phone apart and see if anything is loose but otherwise I'll just have to enjoy the last 30% battery of G1 time I have.

Charging Issue

Has anyone ever had an issue where by their battery life is at say 59% and when i plug it in to charge rather than the blue charging icon appearing it just showing the battery being 100% and the LED doing successive double flashing as opposed to a static LED like i should be if it was charging?
I've not installed anything, flashed a new rom etc, was fine yesterday.
All i did was have a little play with CHTEditor.
somethings not right, it must be something to do with me messing about with CHTEditor
out of the blue my lock screen had gone, and it says i have a voice mail waiting when i dont. haha
Hard reset i think
update...
hard reset not worked...uhoh
Same problem here
I was in a phone call an al of a sudden everything just went black and rebooted. Turns out the phone stopped charging and flasing green and red. Battery ran out of power and the phone shut down. After the reboot the phone charged normally again
Another situation:
Phone started acting up again and endend in a reboot. Battery was empty and i made a phone call on the charger. during the phonecall the same problem happend again, but the battery was at 9%. I intended to unplug the charger and plug it back in, but after the unplug the battery jumped to 0% and shut down.
So, i think the battery is acting up. Having to charge the thing every damn day is finally taking it's toll.
Wizzkid007 said:
Same problem here
I was in a phone call an al of a sudden everything just went black and rebooted. Turns out the phone stopped charging and flasing green and red. Battery ran out of power and the phone shut down. After the reboot the phone charged normally again
Another situation:
Phone started acting up again and endend in a reboot. Battery was empty and i made a phone call on the charger. during the phonecall the same problem happend again, but the battery was at 9%. I intended to unplug the charger and plug it back in, but after the unplug the battery jumped to 0% and shut down.
So, i think the battery is acting up. Having to charge the thing every damn day is finally taking it's toll.
Click to expand...
Click to collapse
The phone seems to charge ok when switched off, i will leave it as it is till im home from work and wil have a tamper with it.
phone is now charging ok, just need to get rid of this voicemail notification now.
hmm and everything back to normal. must be its time of the month
djchubbs said:
Has anyone ever had an issue where by their battery life is at say 59% and when i plug it in to charge rather than the blue charging icon appearing it just showing the battery being 100% and the LED doing successive double flashing as opposed to a static LED like i should be if it was charging?
I've not installed anything, flashed a new rom etc, was fine yesterday.
All i did was have a little play with CHTEditor.
Click to expand...
Click to collapse
tis happens to mine (not allways) hd2 when using non htc battery.
do you have original batt?
bRkiX said:
tis happens to mine (not allways) hd2 when using non htc battery.
do you have original batt?
Click to expand...
Click to collapse
yep, using the original battery, it seems to be ok now, charging as it should.
ahh well. cheers for the reply
one last this, how the hell to i get the lock screen back, i think im being dim.
edit
sorted
I have a program BsB Tweaks that has a setting for the lockscreen. Try that.
My phone is also charging fine when turned off, also it functions fine at the moment. i think it has something to do with overloading the device when the battery is low. Based on that its not possible to turn on any phone when the battery is in attached but the power is, i think everything is drained from the battery while charging it and that when overloading the battery just doesn't pull it anymore.
i don't have a alternative battery, mine is original.
What are the symtoms when the battery is at the end of it's life? does it do this, or is it supposed to give a warning or something?
edit: i am unable to find a manual page describing the different modes the LED could be blinking. I'm curious what is says about the red and green blinking mode. Does such a page exist?

[Q] N7 BRICKED or Hardware fault? PLS Help!

Hi guys,
First of all these are my specs
N7 WiFi 16GB - 4.2.2 PA
Yesterday I tried to turn on my N7 but no go... so i thought: no battery since I didn't used my N7 for 2-3 days. I put it on charge a few hour but then when i tried to turn it on, again... nothing, so i tried to reset and hard reset but no effect... afte letin it a few more hour on charge I tried yet again and noting... i tried to keep power button presed for 30 sec, 60sec, etc... nothing...
Then i conected it to my PC and realized that nor W7 nor W8 recognized my device... It says "USB device not recognized" and also in device manager it says "Unknown device"
The thing is that when I Hard reset it conected to the PC it seems to restart since i get the "disconnected device" sound from windows and the then message "USB device not recognized" appears again...
I want to make this clear MY SCREEN NEVER TURNS ON! so i can't get in recovery or bootloader mode
Also fastboot doesn't see it
And yes I have the correct drivers on my PC on both W7 and W8...
So PLS...ANY Idea would be appreciated!!
Sorry for my English, I hope I was clear enough so that you guys understand my problem and what i did about it until now.
the fact that you cant even get the screen to turn on doesn't sound promising...
are you sure the battery is holding a charge?
jt.one said:
the fact that you cant even get the screen to turn on doesn't sound promising...
are you sure the battery is holding a charge?
Click to expand...
Click to collapse
As far as I can tell there is battery, so that is not the problem ...
Probably would be best to send it to warranty and see what they say ...
TY for reply
Za_RO_Maniac said:
As far as I can tell there is battery, so that is not the problem ...
Click to expand...
Click to collapse
Since the screen never comes on in any circumstance, what do you mean by "as far as I can tell"?
Normally - if the device is powered off - the bootloader (or some other low-level firmware?) displays a charging animation in the display when you plug the device into a charger. If the battery is completely discharged, it will show up as empty (all black with a white outline), and then display a "filling up" animation. If the battery is mostly charged, that animation starts with the battery icon almost full (mostly white) and the animation shows a "topping off" display.
In any event, if you can see that animation, you will know the exact charge state of the battery: the percentage of the battery charge is shown as the percentage of the battery which is white at the beginning of that animation.
But, since you are saying that you are seeing nothing, then you have no idea whether the battery has a charge unless you pull off the connector and measure the battery voltage: discharged is ~ 3.5v and fully charged just shy of 4.2v.
The thing you are seeing on the PC is probably APX mode. It is usually a sign of serious trouble - but only if you have positively verified that the battery has a decent charge.
Anyway, my point is that you kneed to know unambiguously whether the battery has a charge or not before you proceed any further. A discharged battery looks identical to a hard-bricked device.
BTW, I suppose that in APX mode the device is drawing a small amount of current; this means it will inevitably discharge the battery again if it is left in that mode.
So, here is one suggestion:
Take the back cover off the device and unplug the battery. Let the device sit for ten minutes or so with the battery disconnected. (If you have a voltmeter, you can measure the battery voltage at this time so long as you are able to do it safely - don't accidentally short it! - and without damaging the connector. If not, don't worry about it). Press the power button once or twice during this time to dissipate any stored charge in the device.
Then, reconnect the battery pack, but do not attempt to start the device yet! Just plug the N7 onto the charger and see if you observe the charging display. If you see the charging display, don't get all excited and try to start the device up right away! Let it charge for a couple hours before attempting to start it. If you don't see anything at all, it still might be a good idea to leave it sit on the charger for a few hours before attempting to start it up.
good luck
bftb0 said:
Since the screen never comes on in any circumstance, what do you mean by "as far as I can tell"?
Normally - if the device is powered off - the bootloader (or some other low-level firmware?) displays a charging animation in the display when you plug the device into a charger. If the battery is completely discharged, it will show up as empty (all black with a white outline), and then display a "filling up" animation. If the battery is mostly charged, that animation starts with the battery icon almost full (mostly white) and the animation shows a "topping off" display.
In any event, if you can see that animation, you will know the exact charge state of the battery: the percentage of the battery charge is shown as the percentage of the battery which is white at the beginning of that animation.
But, since you are saying that you are seeing nothing, then you have no idea whether the battery has a charge unless you pull off the connector and measure the battery voltage: discharged is ~ 3.5v and fully charged just shy of 4.2v.
The thing you are seeing on the PC is probably APX mode. It is usually a sign of serious trouble - but only if you have positively verified that the battery has a decent charge.
Anyway, my point is that you kneed to know unambiguously whether the battery has a charge or not before you proceed any further. A discharged battery looks identical to a hard-bricked device.
BTW, I suppose that in APX mode the device is drawing a small amount of current; this means it will inevitably discharge the battery again if it is left in that mode.
So, here is one suggestion:
Take the back cover off the device and unplug the battery. Let the device sit for ten minutes or so with the battery disconnected. (If you have a voltmeter, you can measure the battery voltage at this time so long as you are able to do it safely - don't accidentally short it! - and without damaging the connector. If not, don't worry about it). Press the power button once or twice during this time to dissipate any stored charge in the device.
Then, reconnect the battery pack, but do not attempt to start the device yet! Just plug the N7 onto the charger and see if you observe the charging display. If you see the charging display, don't get all excited and try to start the device up right away! Let it charge for a couple hours before attempting to start it. If you don't see anything at all, it still might be a good idea to leave it sit on the charger for a few hours before attempting to start it up.
good luck
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I was referring to this yes : "The thing you are seeing on the PC is probably APX mode."
So ill try your advises and come back with feedback !
TYVM

[Solved; Ignore] Phone on "charge" at 0% Instantly turns off when charger is removed.

[Solved; Ignore] Phone on "charge" at 0% Instantly turns off when charger is removed.
As the title suggests, my phone will only turn on when the charger is plugged in and the battery stats say "0% Charging (AC) - 0s on battery".
Little background. I just flashed stock and AK 301 kernel as well as the latest libs. Phone turned on just fine, battery was at 50%.
I then decided to run Antutu for the hell of it to see if there were any performance changes etc.
Whilst Antutu was running the phone just powered off and wouldn't power back on. I had a red blinking light and that was it.
Eventually I managed to boot in to recovery after following advice to hold power + vol down for 15 seconds then plug the charger in.
The phone was on charge for about 3 hours with the LED still blinking at me.
When I managed to get in to recovery I flashed the only ROM I had on there after wiping all data etc. Which was Mahdi ROM.
Now when I turned the phone on, after many failed attempts, the battery icon is completely depleted with the charging icon inside the battery and as said in my first sentence it says 0% Charging and as soon as I take the charger out, the phone turns off instantly and won't turn back on nor will it blink until I put the charger back in.
Does anyone know whats going on? Could the battery have come loose somehow? I'd like to open it up but I don't have the required screwdriver to do so, anyone know any other way I can crack the case open without damage?
Any help or suggestions are most welcome. I can't return it on warranty as I bought this phone 1 year ago on the 4th June... Of course this had to happen 6 days after warranty expired!
I think I spoke too soon.
I just decided to hold the power button and vol down until the phone completely switched off. Turned it back on and now my battery says 32%.And as of writing this it's now up to 34%. So it's actually showing that it's charging now, whereas earlier the phone was on for about 20 minutes and said 0% the whole time.
Odd. That's all I have to say.
I can't delete my post for some reason. So I'll just flag it as answered. Sorry about that.

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