Nexus 7 2012 - changed battery and charger jack - ? What now? - Nexus 7 Q&A, Help & Troubleshooting

Advice appreciated. I tried every startup option from the web for "dead battery" etc. No success, so I obtained new battery and charger jack. (Connections rechecked)
But it still won't boot.
Is their anything else I can try, or is it for the rubbish bin?
D

Had the same issue. Got a new battery and it was 66% could not get it past that. I also changed the charger port . Did you make sure the cable connector was pushed down on the top ?. I also sprayed deposit on all connectors. Let it charge powered on for close to 30 hours. It now charges fully and battery seems to last. Still slow to charge but way better using a 2.4 ma charger ... hope this helps.

Screen blank
Desertrider, thanks.
My problem is slightly different. Would not start, had blank black screen, all dead. So I checked all connections, and then ordered new charger jack. Still dead, no charge.
So I ordered new battery (which theoretically should have had residual charge). Still dead, also after several hours of charge.
So I assume this means that some other component in the Nexus has failed, preventing revival of the tablet?
Has anyone similar experience and recommendations?

I have the exact same issue. I've removed the shielding and can feel the battery charging (from poor earth).
Did you get anywhere? I'm tearing my hair out.

No Success!
DGronk said:
I have the exact same issue. I've removed the shielding and can feel the battery charging (from poor earth).
Did you get anywhere? I'm tearing my hair out.
Click to expand...
Click to collapse
HI
I still have nothing. What do you mean by "feel the battery charging (from poor earth)."
Logically, with new battery and new charger jack, the battery should function.
So is it a screen failure issue? I wonder how one can test for this?
regards D

Bzzzz
If it's charging and you have the back cover off, stroke the batter and there is a slight buzzing sensation. Similar to macbooks and iPhones. Since they aren't rather earthed properly, you get a buzzing sensation when touching the metal parts.
I had consider a screen issue. Guess only way is to get a new LCD module? Probably the same price as one of these things second hand now.
---------- Post added at 10:49 PM ---------- Previous post was at 10:43 PM ----------
Actually, doesn't the Nexus 7 support HDMI out? If so you could connect it to a tv. I have a feeling I may have a converter cable somewhere.

Related

[Q] Please help. Phone not turning on after battery drained to zero

I gave my phone for repair to Sony, got it after 1.5 months. They said my battery is too low, so gave me another one just to check if the phone is working properly. I came home back, and the phone has been on charge for 2 hrs but it is not yet turning on, with LED continuously blinking red. After some research, I think that the reason is phone won't allow the battery to charge as it has drained to zero, and I need to jump start it by charging externally. But I don't have an external charger. I don't want to approach stupid Sony customer care again as I have had enough of them. Someone please help.:crying:
Have you checked the battery slot? Maybe its not reading/connecting properly... Try cleaning it up. Or leave battery out for a few minutes.
Sent from my R800x
---------- Post added at 09:57 AM ---------- Previous post was at 09:56 AM ----------
Also by the way this should be in the Q&A
Sent from my R800x
Lordomn said:
Have you checked the battery slot? Maybe its not reading/connecting properly... Try cleaning it up. Or leave battery out for a few minutes.
Sent from my R800x
---------- Post added at 09:57 AM ---------- Previous post was at 09:56 AM ----------
Also by the way this should be in the Q&A
Sent from my R800x
Click to expand...
Click to collapse
Have searched the forum to death regarding this and tried everything. The battery slot seems fine. Either Sony has damaged my phone's charging circuitry, or the problem is the complete battery drain. Do I need to charge the phone for several more hours? Is the battery now unusable after draining to zero?
cacarod2007 said:
Have searched the forum to death regarding this and tried everything. The battery slot seems fine. Either Sony has damaged my phone's charging circuitry, or the problem is the complete battery drain. Do I need to charge the phone for several more hours? Is the battery now unusable after draining to zero?
Click to expand...
Click to collapse
Get a USB cable that you dont need and cut the mini end off to expose the wires. Plug the big end into a charging source (either PC or wall charger). Take the battery out of your phone and hold the red wire to the positive and the black to the negative( the battery terminals are marked), you will have to do this for at least 15 minutes or if you can use sellotape or blu tack for a longer period. This will hopefully put enough charge into the battery so that when it is reinserted into the phone it will be able to charge it normally. This is a common android problem.
mulllen666 said:
Get a USB cable that you dont need and cut the mini end off to expose the wires. Plug the big end into a charging source (either PC or wall charger). Take the battery out of your phone and hold the red wire to the positive and the black to the negative( the battery terminals are marked), you will have to do this for at least 15 minutes or if you can use sellotape or blu tack for a longer period. This will hopefully put enough charge into the battery so that when it is reinserted into the phone it will be able to charge it normally. This is a common android problem.
Click to expand...
Click to collapse
Thanks infinite times, you r genius, that was the solution I was looking for. You saved me another trip to stupid Sony customer care. It is funny that despite these days of sophisticated technology, I had to resort to such primitive method for charging just because of the lazy manufacturers who want everything done by the readymade OS and cannot put in some extra hardware to overcome a serious and obvious defect. Thanks again.:good:
Your mother board might have a short. My previous phone have this issue and I had to use another Play to charge the battery. It also had battery drainage over night. I would recommend getting an external charger and extra battery, they're fairly cheap.
Sent from my Galaxy Nexus

[SOLVED] Did I cook my battery?

Yesterday I used my N7 while running errands & it was parked in the long neck windshield mount I have for it. This is the first time I've done this. I work third shift and it's usually night or early morning (and cool) when I'm driving with the tablet. Yesterday it was hot and the sun was shining. I didn't leave it in the car but it got hot riding around. I kept it plugged into my car charger the entire time (2 amp charger that fast charges). It stayed charged up most of the day but at some point it stopped charging. I noticed when I got home and the charging animation had stopped.
I took it in & plugged it into the wall A/C charger but it still did not report as charging. I just thought the battery was hot from being in the sun all day & had tripped some thermal sensor that prevented charge. I kept it on & plugged in thinking it would start back up when the battery cooled off. Nope.
The tablet is @ 6% now. I is off completely now and I don't have enough charge left to do a nandroid. I've tried all kinds of combinations of chargers and cables but it refuses to charge.
Did the heat kill the battery or some of the circuitry?
Is there any way to back this N7 up?
I'm planning on getting a new one when the new models come out anyway but I'd at least like to get a backup off of this one...
Edit: I updated my sig before submitting this post but it's not showing up yet.
I'm running Trinity Kernel & RasbeanJelly. Both are up to date.
Update: For anyone interested, I found & fixed the problem. I took the back off & was looking around for anything obvious. I knew the problem had to be either the battery or the usb port (or the electronics for either one). The battery is pretty much self contained so not much I could do there. The usb port is screwed down under the speakers and there is a flat ribbon cable that runs from it up to the logic board. The connector on the board is covered by a piece of black electrical tape type material. That is where the problem was.
There is no locking mechanism for keeping the ribbon cable seated in the connector. It is only held in place by the tape. When my Nexus got hot, the adhesive on the tape failed and the ribbon cable must have moved just enough to disconnect it. Thus preventing power getting from the port to the logic board and battery.
I reconnected the cable & reapplied the tape.
Problem solved!
On a side note, this week without my Nexus made me realize just how much I love this tablet. I have a Nook color running CM7 and an HP Touchpad running CM9 that I used as backups but the Nook was way too slow and the Touchpad was too big to be convenient. I can't wait for the new version...
Sent from my Nexus 7 using Tapatalk HD
I suggest putting some hot glue or 2 part apoxy on that ribbon cable to keep it from happening again.
Sent from my Nexus 7 using xda premium

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] charging problem

Hello, I bought tegra note 7 tab couple of months ago. It was working fine but recently im facing problem in charging it. The tab does not recognise its original charger and does not charge with the charger. Tried a lot but cant understand why? Somebody help plz
irfanalik97 said:
Hello, I bought tegra note 7 tab couple of months ago. It was working fine but recently im facing problem in charging it. The tab does not recognise its original charger and does not charge with the charger. Tried a lot but cant understand why? Somebody help plz
Click to expand...
Click to collapse
The TN7 has unfortunately been known to have wonky USB ports, so if you're having issues with it then you might want to contact the manufacturer and see about getting a replacement.
I had the same problem and I was able to fix it. Turn off the device, take a needle and try to narrow the USB port, GENTLY AND SLOWLY, try to make the hole to be tighter. I hope it helps. Tegra note is ****y stuff...
How?
rochspioch said:
I had the same problem and I was able to fix it. Turn off the device, take a needle and try to narrow the USB port, GENTLY AND SLOWLY, try to make the hole to be tighter. I hope it helps. Tegra note is ****y stuff...
Click to expand...
Click to collapse
Hey there my usb port, like many others has also gone bust. You mentioned trying to narrow the usb port, what do you mean by this? My tab has be useless for the past month since curries refused to repair it saying it was my fault. I guess its all down to me somehow fixing it any help would be appreciated. Thanks
Have you tried holding down the power button for around 30secs. My battery got drained completely and it didn't seem to be charging, even after a few hours using different chargers. After holding down the power button down for 30 seconds. Then releasing the button. Then pressing again. It came alive.
I may have had a different problem but hope it works for you.
charging problems...the port maybe?
Just bought a refurbished evga tn7 from ebay and it was charged 84% so cool. I played on it for a while bout maybe an hour or so. I left it to charge that night and it didn't charge very fast. Ever since it will only charge with the wall outlet with another cable or the one that came with it. Takes about 6 hours or so to charge even 40%. It also discharges very quickly about a percent a minute or so. It came with the 4.4.2 update. I love this tablet but I can hardly use it because of this. Please help!
Abdur Desai said:
Hey there my usb port, like many others has also gone bust. You mentioned trying to narrow the usb port, what do you mean by this? My tab has be useless for the past month since curries refused to repair it saying it was my fault. I guess its all down to me somehow fixing it any help would be appreciated. Thanks
Click to expand...
Click to collapse
hya - its not hard but you need some nerve, it is relatively easy to wire a QI wireless receiver direct to the battery then fit a charger into a suitable case.
I've done four of these now using fintie slate 7 extreme cases (ebay US) and QI elements from ebay UK. cost about 25 quid or so.
short term or as an alternative you can strip a usb cable or get a micro usb extension cable and wire that to the battery instead so you can charge it up using a smart USB charger. it is possible to wire into the charging circuit so it registers if you are carefull and solder to the board side of the USB otherwise the QI is probably a better option as the charger will switch off when it decides the battery has been charged minimising any possible fire risk from overcharging,
it is also possible to get a phone/computer repair shop to fit a new usb socket as the boards aren't available for some daft reason - they are listed on alibaba but not available.
the only issue is not having a working usb port but as long as you don't want to root the device it doesn't seem to be needed.
---------- Post added at 07:01 PM ---------- Previous post was at 06:55 PM ----------
Squee777 said:
Just bought a refurbished evga tn7 from ebay and it was charged 84% so cool. I played on it for a while bout maybe an hour or so. I left it to charge that night and it didn't charge very fast. Ever since it will only charge with the wall outlet with another cable or the one that came with it. Takes about 6 hours or so to charge even 40%. It also discharges very quickly about a percent a minute or so. It came with the 4.4.2 update. I love this tablet but I can hardly use it because of this. Please help!
Click to expand...
Click to collapse
my wireless mod charges slower than it should as its only rated to 1A but not that slow - Ideally you need a 2A charger for tablets min 1A for decent charging, most phone chargers are 500-750mA.
otherwise turn the tablet off and all the power goes to charging.

Nexus 7 not charging....(hardware problem/ battery problem?)

Hey guys...hope you guys reply asap. well my nexus 7 microusb port is fine.( how i know? well i bought a few from online and none work)
i charged from side pogo pins a long while and now it doesnt charge anymore. atleast it says its charging but % stays the same... i have no idea what to do..i cant waste any more money on it.
mmystere68 said:
Hey guys...hope you guys reply asap. well my nexus 7 microusb port is fine.( how i know? well i bought a few from online and none work)
i charged from side pogo pins a long while and now it doesnt charge anymore. atleast it says its charging but % stays the same... i have no idea what to do..i cant waste any more money on it.
Click to expand...
Click to collapse
You should let the device charge for a full 24hrs. It maybe bugged or the battery is calibrated wrong. Similar thing happened with my LG G Watch R.
Mine wouldn't charge a while back and I fixed it by cleaned the contacts on the ribbon cable going to the USB port. Take off the back, remove the battery, carefully pull the ribbon cable out of the USB port, clean the contacts (I used as white eraser). Reassemble. The contacts get a light corrosion on them after time and this cleans it off. I did need to do this again a few weeks later so maybe plug the cable back in then pull it and clean again. There could be residue in the USB port ribbon cable plug that gets back onto the contacts. Doing it a few times can help get that out. Worth a shot and costs nothing.
Sent from my Nexus 7 using Tapatalk
How long did you leave it charging for?
I remember one time I thought my Nexus was dead and wouldn't charge, as normally you would see the charging indicator on the screen but on mine it didn't. In the end , I thought I'd just be patient and just left it for a very long time and it started to charge again.
I had this happen on a wall mounted nexus 7 that just stayed plugged in all the time. I eventually just ordered a new battery for it off amazon, and it resolved the problem.
---------- Post added at 02:15 PM ---------- Previous post was at 02:11 PM ----------
My mistake. I got it off ebay from a guy named computerparts409 for $17.99 + $3.47 shipping back in March.

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