Database Users

Nexus 7 Won't Turn On

Hey everyone,
I've tried searching, but no luck, so here's my issue.
My nexus 7 was around 25% battery last night so I plugged it in for the night.
Woke up this morning and the backlight was on, but the screen was off.
When I unplugged my n7 the backlight turned off. Hitting the power button had no effect.
I then tried pushing and holding the power button for roughly a minute, nothing.
I have disconnected the battery and still no response from the unit.
I plugged it back in for roughly a minute as well, still nothing.
Unfortunately I don't have access to a charger right now.
Is it possible the battery is dead even though it was on the charger all night?
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Weird.
Just plugged it in to my car charger and it booted up. Battery is completely dead, so I guess with the backlight staying on all night it didn't charge.
Now why would the backlight stay on if the screen is off...
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Don't go flashing different roms and kernels now like most of the idiots here, it could just have been your charger being faulty or a bad connection to the tablet overnight. if the problem happens again then you can investigate further.
BTW, were you charging from your PC/Laptop with a USB cable or through a wall adapter? i've had issues in the past charging my Nexus 4 and 7 not charging overnight on my PC

I feel like a broken record but since I've fixed a ton of n7s with loose battery connections, I would recommend checking the internal battery lead to make sure its not loose. Asus didn't do a good job of making sure all n7 batteries were secure and this allowed the battery to shift and pull the power lead out. Some clear scotch tape on the connector and one on the battery (avoid the copper tape areas) will eliminate this problem if that's what you have.
Sent from my Nexus 7 using Tapatalk HD

dottat said:
I feel like a broken record but since I've fixed a ton of n7s with loose battery connections, I would recommend checking the internal battery lead to make sure its not loose. Asus didn't do a good job of making sure all n7 batteries were secure and this allowed the battery to shift and pull the power lead out. Some clear scotch tape on the connector and one on the battery (avoid the copper tape areas) will eliminate this problem if that's what you have.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
I ran into this problem. Initially, my Nexus 7 didn't start. When I plug in the charger the screen would flicker from time to time but there's no indication of charging. So I decided to open it up to see that the battery cable has loosened. So I managed to fix it and use it happily thinking that it won't happen again.
Since last week, the same issue happened. I thought it was the same issue and opened it up to see that the battery cable is firmly in place. So I got a shock. I removed it and re-inserted it again to see if it fixed it. But nope, it won't turn on. And now it's been a week and I don't know what to do It's nothing wrong with the loose cable cuz now it's firmly in place.
Now when I plug it in to charge, the screen will just flicker (as in the back light will turn on and off in 5 sec intervals). What do you think I should do? I tried holding the power button for 30 secs as well.
I bought this new from eBay and still under warranty. But I live in Sri Lanka. So when I bought it, I had to ship to a friend in the US and had to wait till he came down. So it's not easy for me to ship back and to receive another device. Hopefully I can find a solution to fix this myself.

Su_Tweetz said:
I ran into this problem. Initially, my Nexus 7 didn't start. When I plug in the charger the screen would flicker from time to time but there's no indication of charging. So I decided to open it up to see that the battery cable has loosened. So I managed to fix it and use it happily thinking that it won't happen again.
Since last week, the same issue happened. I thought it was the same issue and opened it up to see that the battery cable is firmly in place. So I got a shock. I removed it and re-inserted it again to see if it fixed it. But nope, it won't turn on. And now it's been a week and I don't know what to do It's nothing wrong with the loose cable cuz now it's firmly in place.
Now when I plug it in to charge, the screen will just flicker (as in the back light will turn on and off in 5 sec intervals). What do you think I should do? I tried holding the power button for 30 secs as well.
I bought this new from eBay and still under warranty. But I live in Sri Lanka. So when I bought it, I had to ship to a friend in the US and had to wait till he came down. So it's not easy for me to ship back and to receive another device. Hopefully I can find a solution to fix this myself.
Click to expand...
Click to collapse
Make sure that the cables between the battery and the connector are intact and not broken. One or two people reported a broken cable.
Does it boot while plugged in to the charger with the battery disconnected ? You could simply have a bad battery.
Sent from my Nexus 7 using Tapatalk HD

dottat said:
Make sure that the cables between the battery and the connector are intact and not broken. One or two people reported a broken cable.
Does it boot while plugged in to the charger with the battery disconnected ? You could simply have a bad battery.
Click to expand...
Click to collapse
I checked again. The cables aren't broken. They are all in good shape.
It doesn't boot when I plug in. Actually it doesn't show anything on the screen. If I look closely I can see static flicker on the screen from time to time. Just like the static in TV but much much less. Like only a few of those in certain places.
When this happened the first time I opened it up to see the loose cable. So fixing that helped it then. But now I dunno what's causing it.
Sent from my Galaxy Nexus

Might have to try a different charger, maybe something stronger. I JUST had that problem with my GF Nexus 7. It wouldn't boot with her normal charger and the screen would flicker like a TV. I used my Nexus 4 charger and it worked.
She had left the battery fully drain for over two weeks and I think the battery didn't appreciate it.
Sent from my Nexus 4 using xda premium

Nexus Won't Charge

This may be the noobiest of questions, but is there anything special that needs to be done to chage the unit or is anyone aware of units with bad charging ports. I just unboxed my Nexus last night and as my usual new device ritual put it on the charger for a few minutes. Noticed the battery icon came on for about 5-10 seconds and then disappeared. Figured it was normal but when I powered it on we only at 43%. Shut it off and let it "charge" overnight but when I powered it back up still at 43%. Tried a different cable with same results. Calling store today but wondering if I might have missed something.
Sent from my EVO using xda app-developers app

mumbles202 said:
This may be the noobiest of questions, but is there anything special that needs to be done to chage the unit or is anyone aware of units with bad charging ports. I just unboxed my Nexus last night and as my usual new device ritual put it on the charger for a few minutes. Noticed the battery icon came on for about 5-10 seconds and then disappeared. Figured it was normal but when I powered it on we only at 43%. Shut it off and let it "charge" overnight but when I powered it back up still at 43%. Tried a different cable with same results. Calling store today but wondering if I might have missed something.
Sent from my EVO using xda app-developers app
Click to expand...
Click to collapse
A common problem seems to be that the battery connector is not properly seated during assembly. Pop off the back cover and visually inspect the connector. Also, there are a handful of threads regarding the issue you're having. You may want to search for them and check them out for some pertinent info.

najaboy said:
A common problem seems to be that the battery connector is not properly seated during assembly. Pop off the back cover and visually inspect the connector. Also, there are a handful of threads regarding the issue you're having. You may want to search for them and check them out for some pertinent info.
Click to expand...
Click to collapse
Thanks. Does the back just pop off? Was running out the door to work so didn't get to search. Will check when I get home.
Sent from my EVO using xda app-developers app

Ok, so got the back popped off and all look connected. Power the unit back on and somehow it's at 49% and my wife said when she picked it up earlier today it was at 55%. Checked the battery stats and it's been online for 9 hrs. If I plug it in while powered on the charging icon displays as if it's charging. Just tried leaving it powered on and connecting the charger and just leaving it. If I hit the power button the charging icon comes on, so maybe it is charging, just incredibly slowly?

mumbles202 said:
Ok, so got the back popped off and all look connected. Power the unit back on and somehow it's at 49% and my wife said when she picked it up earlier today it was at 55%. Checked the battery stats and it's been online for 9 hrs. If I plug it in while powered on the charging icon displays as if it's charging. Just tried leaving it powered on and connecting the charger and just leaving it. If I hit the power button the charging icon comes on, so maybe it is charging, just incredibly slowly?
Click to expand...
Click to collapse
My cable went bad within a month. Luckily, every other item we own seems to have the same micro-usb slot, so we had a ton of other cables to try, so that fixed it. But two bad cables - I wouldn't guess that.

Try to unplug the battery and replication it again. Open the back cover and do that. You need to be carefully and not to break the pins.
Sent from my Nexus 7 using xda app-developers app

Seems to be charging ok now. Going to watch it today, then be in adb later for root.
Sent from my EVO using xda app-developers app

Battery/Charging Issues (Nexus 4)

I am having problems with my Nexus 4.
History, replaced screen after phone was knocked out of my hand, probably damaged battery while trying to remove it, but everything worked once it was back together.
Screen broke again, and while working on that, I noticed the battery had swollen so ordered a replacement of eBay.
All back together now, but.
1 Phone does not state "charging" when connected to AC or USB charging, although the battery icon has the lightning bolt in it and the %charge does not drop while messing with the phone.
2 Phone does charge using wireless, but slowly, and status swaps back and forth between charging and not charging and the % will move from e.g. 40% to 35% as it says charging or not charging.
3 USB works for connection to PC.
I charged the new battery overnight, wirelessly. It got to about 90%, so slow charging, but seems to work. Phone is usable, everything seems to work. I connected it to PC and was able to use Nexus Root Toolkit to backup, the reset the phone, no change in charging behavior.
Booting into safe mode made no difference either. So it seems it is not software/firmware/apps that are causing the problem?
I guess next step is to open it up again and remove and remake all connections and check contact posts? Should I order a third battery? Or a new motherboard?
I searched here, but could not find anyone with the same problem.
Any and all help appreciated. Thanks in advance, guys.

Opening and rechecking connections and coating with contact cleaner has made no difference.
Phone typically needs Volume Down and Power button pressed to get it to start, then Power Button to select start option, then seems to run okay.
Battery still not reaching 100% charged, generally 70-80% after a full night off, using wireless (my Nexus 5 charges happily on same charger).
Ordered a cheap battery from China, not really expecting that to be the problem, but no other clues or suggestions for now.

Any update?
My battery is ****e now, lasts 3-4 hours and I need to turn off the phone and charge. It takes 4+ hours to charge when switched on. Charging via the PC you can forget it, it drains the battery if anything!
I'm thinking of buying the battery on eBay and doing my research on how to fix myself.

Phone not switching on and Battery issues
Hi,
I have been facing quick drainage of my Nexus 4 battery since past few months. Recently I had been keeping it on charge almost the whole day, and a full charge would last only 2-3 hours! Further, the charging was taking a lot of time too.
Today, my phone had already switched off due to low battery when I put it on charger. After the white charging icon appeared for a few seconds, the phone wasn't charging at all. I have tried 4 different chargers, but to no avail.
Can someone help me? Is there a guide on how to change the battery?
Any help and urgent help appreciated!
Zany!

Cooldood2012 said:
II guess next step is to open it up again and remove and remake all connections and check contact posts? Should I order a third battery? Or a new motherboard?
I searched here, but could not find anyone with the same problem.
Click to expand...
Click to collapse
It's possible some hardware was damaged when you took apart and put back together your phone. The USB board is a possibility, as is the back cover itself. These parts are pretty inexpensive, if you want to try buying a replacement, but that's just a shot in the dark.
uncle_buckman said:
Any update?
My battery is ****e now, lasts 3-4 hours and I need to turn off the phone and charge. It takes 4+ hours to charge when switched on. Charging via the PC you can forget it, it drains the battery if anything!
I'm thinking of buying the battery on eBay and doing my research on how to fix myself.
Click to expand...
Click to collapse
Buy a new battery. Li-ion batteries are only good for a few hundred cycles or so (~500 cycles is the expected lifetime), and the N4 isn't exactly the best in battery life, so you can reach the point where your battery turns to crap within a year or so (or less).
Go to ifixit.com and look at the teardown. All you need to replace the battery is a T5 TORX driver (for the screws at the bottom), something thin and plastic (like a guitar pick or a plastic knife - they do make professional tools for this) to pry the back cover off, a tiny phillips screwdriver (like for eyeglasses) for the battery screws, and something to pry the old battery off of the adhesive holding it in. Double sided cellophane tape works fine for keeping the new battery in. When prying the cover off, go slowly. A little at a time, don't rush or force things. Or you might flex too much and crack the back glass. Don't forget to take out the SIM tray first.
zanyguy said:
Hi,
I have been facing quick drainage of my Nexus 4 battery since past few months. Recently I had been keeping it on charge almost the whole day, and a full charge would last only 2-3 hours! Further, the charging was taking a lot of time too.
Today, my phone had already switched off due to low battery when I put it on charger. After the white charging icon appeared for a few seconds, the phone wasn't charging at all. I have tried 4 different chargers, but to no avail.
Can someone help me? Is there a guide on how to change the battery?
Click to expand...
Click to collapse
Time for a new battery. See above.

My battery have started to swollen up a bit but not alot (around 1mm or less, but it is noticeable when not in a case, it can wiggle a bit from side to side but not alot at all).
I have already ordered a new battery if it is expanding more, but yet battery life is pretty good in standby but not getting more then 3hours of SOT. but since im mostly using the N4 for email's and texting its not a problem for me to get through a full day.

I'm having the exact same issue but I've never taken the phone apart. In the 20 minutes its been off charger it's dropped 11% screen off in my pocket. It also gets hot and shuts off.

apocolypsecow said:
I'm having the exact same issue but I've never taken the phone apart. In the 20 minutes its been off charger it's dropped 11% screen off in my pocket. It also gets hot and shuts off.
Click to expand...
Click to collapse
That could be software/ROM related. It sounds like somethings keeping your phone going full blast instead of letting it idle.

Yup, trying going back to full stock (should always be first step if possible), and then you can go from there. If it doesn't happen, than it was a software issue, and if it still does than it is definitely a hardware issue. Best of luck.
Sent from my Nexus 4 using XDA Free mobile app
---------- Post added at 04:29 AM ---------- Previous post was at 04:27 AM ----------
With a swollen battery I strongly recommend you stop actively using the device. Swollen batteries can explode and that would not be good at all. I advise you to please not use the device anymore.
EDIT: Spelling
Sent from my Nexus 4 using XDA Free mobile app

Third battery (original, suspect replacement, now China sourced replacement) has been working well, phone back together and preforming as new for the last few months

[Q] [Issue]: Weird behaviour and battery problems

Hey all at xda,
Recently I purchased, second hand, a Nexus 4. But I have been having massive issues with the battery. Firstly it seems to be completely inaccurate in reading the battery levels. It jumps all over the place, and reports back RIDICULOUS charging speeds. (10 minutes and the phone went form 7% to 95% :S).
The other problem that I have been having aside from those strange sporadic readings is the fact that the phone does not work at all when it's not plugged in. It lasts for 3 or 4 seconds after I unplug it, and then turns off, and appears to bootloop when I attempt to start it back up again, even when I plug it back in. I CAN get into the bootloader and my TWRP recovery perfectly fine and with no issues. TWRP often reports a 25% battery drop despite the fact that I JUST removed its charger.
It still bootloops when I plug the charger back in and let it charge for some time. I actually have to go into recovery and execute a factory reset to be able to get back into the ROM.
Should I try different ROMs?
Originally I put on cyanogenmod 11 kitkat. While I was running through the initial phone setup was the first time I encountered this unplugged issue. Due to this, and the bootloop I thought I had softbricked the phone, and so I reflashed from CWM to TWRP and put on a different ROM.
I upgraded to kitkat 4.4.4 this ROM to be exact. There seemed to be no issue it runs PERFECTLY when plugged in. But still doesn't last when not plugged in, and begins reporting strange battery percentages, eventually turning off completely.
When attempting to restart the phone I get the Google image, with the unlocked padlock at the bottom, and then it goes straight to the battery image with the electricity symbol in the middle. The same occurs when starting from the bootloader. Occasionally the same occurs when attempting to get into twrp but not always.
Is this simply a battery issue, and will replacing the battery solve the issue, or are there larger problems at steak here? Did I get ripped right off by the seller. (Doesn't seem like it, seller told me to contact him if there were any issues and he would do his best to help / solve the problem for me.)
Thanks guys,
Pensai

I would try out some roms and kernels and see what happens. And if nothing helps than contact your retailer and ask for him

Sounds like the battery is bad to me.
Sent from my Nexus 5 using XDA Free mobile app

CCody said:
I would try out some roms and kernels and see what happens. And if nothing helps than contact your retailer and ask for him
Click to expand...
Click to collapse
I'll try some more rom's and see if the issue persists. Unfortunately contacting my retailer won't help as this is a second hand purchase from an individual, rather than a store/company. (got a sick deal btw 180 for it ).
jd1639 said:
Sounds like the battery is bad to me.
Click to expand...
Click to collapse
I'm hoping this is purely the issue, since it's and easy fix, I'll try the above suggestion when I get home from work. (or before hehe) If new roms and kernals don't fix the issue I suppose I'll order a new battery and hope for the best. They're pretty cheap anyway.
Another thing that may be worth mentioning, is that USB charging seems to be useless in giving the battery any juice. It somehow is actually capable of draining quicker than it chargers if left on plugged in. Even turned completely off and just plugged in to charge yields no results. It must be plugged into the wall.

Just a bit of an update, I got home from work and noticed that the screen had begun to separate from the chassis. I suspected that perhaps the battery was bloated, given the issues I have been having. I am now 99% sure it is the battery.
When I took the phone apart, the battery was indeed bloating and and even burst open on the bottom, exposing these 'layers' along with some casing ruptures on the bottom of the battery as well.
I have ordered a new battery and it has shipped. Hopefully a new battery is the nail in the coffin for this issue.

Pensai said:
Just a bit of an update, I got home from work and noticed that the screen had begun to separate from the chassis. I suspected that perhaps the battery was bloated, given the issues I have been having. I am now 99% sure it is the battery.
When I took the phone apart, the battery was indeed bloating and and even burst open on the bottom, exposing these 'layers' along with some casing ruptures on the bottom of the battery as well.
I have ordered a new battery and it has shipped. Hopefully a new battery is the nail in the coffin for this issue.
Click to expand...
Click to collapse
Wow that sounds scary lol. Imagine if it was a Li-Ion, they are more dangerous than Li-Po

Mashed_Potatoes said:
Wow that sounds scary lol. Imagine if it was a Li-Ion, they are more dangerous than Li-Po
Click to expand...
Click to collapse
I don't know much about battery tech, but the front of the battery says Li-Ion, should I concerned since I've handled it with my bare hands?

Pensai said:
I don't know much about battery tech, but the front of the battery says Li-Ion, should I concerned since I've handled it with my bare hands?
Click to expand...
Click to collapse
Just wash your hands. It's not going to kill you handling the battery.
Sent from my Nexus 5 using XDA Free mobile app

Pensai said:
I don't know much about battery tech, but the front of the battery says Li-Ion, should I concerned since I've handled it with my bare hands?
Click to expand...
Click to collapse
It still is a Li-Po battery. Li-Po and Li-Ion both are types of Lithium-Ion batteries, the difference is that their structure is different
Li-Po is safer and less hazardous
https://www.youtube.com/watch?v=fkP-b1ADvbk
Here is a funny Li-Ion explosion video

jd1639 said:
Just wash your hands. It's not going to kill you handling the battery.
Click to expand...
Click to collapse
Mashed_Potatoes said:
It still is a Li-Po battery. Li-Po and Li-Ion both are types of Lithium-Ion batteries, the difference is that their structure is different
Li-Po is safer and less hazardous
[cantpostlinks]:laugh:
Here is a funny Li-Ion explosion video
Click to expand...
Click to collapse
Thank you for the info, It makes sense now with the 'polymer' after the Li-Ion. Also, that video was quite amusing to say the least. :laugh:

Think my phone is dead. Won't boot. any ideas?

I've been having a few issues with my Nexus 4 on 5.1.1.
Twice in the past month I've had random Force closures of all aps. Facebook was the worst. But then it goes on to all other apps including the launcher.
First time that happened I did a factory reset and things went well. Yesterday it happened again while it was on another charger and I can get my phone to boot.
The screen backlight looks like is on when it's plugged into the charger and will go out if I hold the power button down for 5 to 10 seconds.
If I hold the power button down for 10 seconds when the charger is connected the LED flashes red till I take my finger of the Power button.
I've let it charge overnight (12 hours) and I've tried holding both volume buttons with the power button.
As well as Volume up and Volume down separately with the power button.
Is the phone dead? anyone got any ideas on how to bring it back to life
I've got a screwdriver set on order as I don't have fine enough star screwdriver to remove the internal battery connection. Which is my next step..

I think you are right to try replacing your old battery. Be careful while scraping it out where it is glued in not to tear it up too bad because it can 'splode. Might want to use a plastic card for that. I used a metal shim, an iOpener, and am much better now...
Sent from my Nexus 6 using Tapatalk

I'm going to try just unplugging the battery from the board first before I attempt to replace it.
Think it's time for an upgrade anyway.
Got my eye on the "OnePlus-X" as my next phone.

Removed the battery and stuck my multimeter into it.
It's got V output of 3.61 volts but amps drop off a cliff to zero as soon as I touch the contacts.
New battery arriving tomorrow.

i have the same problem with my nexus 4 dude. it boots when it is connected to the charger. basically it works like a desktop. I went into recovery mode and did a fectory data reset and wiped all the cache. Pliz help me proceeed. I kind have a hunch that its a software thing. did yours start working ater change of battery? Thanks ..

Suraj Sanjay said:
i have the same problem with my nexus 4 dude. it boots when it is connected to the charger. basically it works like a desktop. I went into recovery mode and did a fectory data reset and wiped all the cache. Pliz help me proceeed. I kind have a hunch that its a software thing. did yours start working ater change of battery? Thanks ..
Click to expand...
Click to collapse
Can you go to recovery without charger plugged in?

karsondang said:
Can you go to recovery without charger plugged in?
Click to expand...
Click to collapse
yes dude. i can go to recovery without it even being plugged in. I m pretty frustrated. I plan on giving it to the repair centre but he will charge me a bit high. Doesnt matter will let you guys know if I do find a solution.

Well my "new" battery arrived yesterday.
And it's getting sent back today!!
Got it through Amazon and when the battery arrived it looked ok but would not charge. I took it out to check the contacts and the ribbon came away form the battery! Looks like it was not soldered to the battery properly (if it ever was!) Just glad it didn't cause a short and kill the phone or myself.
Getting one from a different supplier tomorrow. Hopefully this one will work!

s0litaire said:
Well my "new" battery arrived yesterday.
And it's getting sent back today!!
Got it through Amazon and when the battery arrived it looked ok but would not charge. I took it out to check the contacts and the ribbon came away form the battery! Looks like it was not soldered to the battery properly (if it ever was!) Just glad it didn't cause a short and kill the phone or myself.
Getting one from a different supplier tomorrow. Hopefully this one will work!
Click to expand...
Click to collapse
Please let me know! I've ordered a third battery just now. The first one was an aftermarket one, the second one was apparently a knock-off, this one was smaller than the original one.
The third one is hopefully a genuine LG one since the reseller is listed on LG their site.

Dam!!
Replacement battery arrived today. Looks good.
Installed it and the same thing is happening!
Screen backlight goes on. does not seem to be charging!
Now thinking the motherboard is buggered!
But I'll keep the phone on charge overnight just in case...

Damn that sucks to hear man. Hope it works tomorrow!

Now just searching freebe sites and eBay for any damaged cracked nexus4's I could scavenge from

Suraj Sanjay said:
yes dude. i can go to recovery without it even being plugged in. I m pretty frustrated. I plan on giving it to the repair centre but he will charge me a bit high. Doesnt matter will let you guys know if I do find a solution.
Click to expand...
Click to collapse
After battery replacement, my Nexus 4 is come back

karsondang said:
After battery replacement, my Nexus 4 is come back
Click to expand...
Click to collapse
Good on you!
No point in replacing a great phone if you can help it