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
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Hello everyone.
So 2 weeks ago my tablet fell off a table while it was charging.. And the charger got bent but still worked.
Today I was charging the tablet and using it, and the charger fell out, leaving a part of it in the tablet.
I went to Bestbuy, Walmart, OfficeMax, and Staples. None of them wanted to risk trying to take it out. Expected. Some suggested I send it to Acer, which I don't prefer.
When I plug whats left of the charger now, it charges (but keeps falling out).. I'm thinking that getting a new charger won't work since the broken part of this charger is still in there..
Is the docking station my only choice? If so, are there any cables that use that port to charge without the whole "docking station" ?
Thanks for reading!
A paperclip straightened out, or a sewing needle gently inserted can dislodge the part that is stuck in there. That is how I removed mine.
I would maybe drain the battery down to 0 before sticking something metal in there that may cause a short.
Same issue discussed here:
http://forum.xda-developers.com/showthread.php?t=1338286
YAY!! I took it out using a geometry compass, so happy!
Just ordered a new charger :d
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
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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.
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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
Before anyone go crazy, it's most likely my fault. Since the battery is superglued to the phone I had to bend it pretty hard when I replaced the screen. And it was probably damaged
Anyway 6 month later my battery expanded and broke the glass back. There is a very visible bulge on the back (~1/16" thick), on a flat surface the phone wobble. I don't know when or how it happened, at some point I got the phone out of my pocket and it was broke.
I have a strong suspicion it happened while using a 2.4A/12V car charger at -25°C.
My real question (TL;DR) : Is there a risk using a 2.4A/12V car charger ? (my previous one was a 1A and it was barely charging the phone)
Doesnt matter what the current output of the charger is. The device has current limiting technology. It will max out at 1A so if your using a 2A charger your fine.
Also the car puts out 12VDC but it gets stepped down to 5V at the micro usb port. Thats the industry standard.
Now when you bent your battery you started the process of damaging it. Li-Ion batteries have a very thin sheet with paste on it and that is wound up with many layers. By bending it you probably flexed the thin sheet and that soft spot eventually broke and when that happens a chemical process begins to break down the battery. The bulging you are seeing is a buildup of gasses inside the sealed battery its self. When a battery begins to bulge its going bad. This can also happen prematurely if you expose it to over heating repeatedly OR for a long period of time, OR if you allow the battery voltage to drop to low for to long. Li-Ion just doesnt like heat or low voltage.
I concur with IAmSixNine you need to either replace the battery or get a new phone. And be sure to dispose of it properly. I had the same problem years and years ago with an old HTC touch diamond. The battery started bulging and I eventually had to remove the cover and use tape to hold it in. After a couple weeks it burst and it wasn't a pretty site... Pretty dangerous carrying around a battery that could explode in your pocket at any time.
Sent from my Nexus 4 using XDA Premium 4 mobile app
Thanks, good to know that the charger can't damage the battery, I have purchased a new battery lets just hope this one does not explode in the mean time
Ive replaced the battery, the first charge took 8hour to 90% and now it wont charger over 50% is there a way to reset the battery limit ?
Sent from my Nexus 4 using Tapatalk
let it cycle a few times to correct the battery information.
That means let it die down completely, then charge it completely. Do that a few times and if it still causing issues its possibly a bad battery.
I think I also have a faulty charging port, only the wireless charging is working now, when I plug into any usb there is the lightning icon but it says not charging. I'll switch the daughter board with the one from my other broken nexus 4 to see if it fix the issue.
As much as I like my Nexus 4, I'm not impressed by reliability. In under 2 year, I've had 2 broken screen, 1 broken bake cover, 1 expanded battery and now possibly the charging port. My nexus S and Galaxy nexus with a million drop each are still working as new
One of my friends got one and broke his before the 2 month mark. He was ribbing me about getting a case for it and making it more bulky. I was not the better man...
OK guys, I've waited a while to finally post this but I'm about to toss this device.
So for the past few months USB charging cables no longer stick into the charging port. When you first get the device you could practically flail the phone around by the USB cord. However, now they are so lose I have to tape the cord to the phone to maybe get it just right and charge. The USB slot is looser than a two dollar whore now.
It first started with the factory charger (which died) and never got a replacement (thanks moto)! So got another 3rd party charger and that cable was better but still not tight. Now no cable will stick and is a sloppy mess.
I'm assuming this is going to require a RMA and replacement? Would this even be covered, and considering the RMA for my stock charger months later resulted in no new charger it's worrying too attempt a phone RMA. Let alone the short lifespan of the port. I only plug in ever 1-2 days by the way.
Anyone else having this issue and if so what did you do?
Sent from my XT1575 using XDA Free mobile app
Out of all of my devices, I've only had one port fail, on a tablet, that I believe someone sat on while it was plugged in. But, on all of my devices, I plug them in and leave the device alone. Are you tossing your device around while it's plugged in, or sleeping next to it while it's plugged it? I know parts fail, but the stock charger clips in snugly on my moto daily, and on my tablet every 3rd day, and I have zero issues. Even my cheap cables and car charger plugs snugly. Maybe you just got a faulty part.
Sent from my SM-P600 using XDA Premium HD app
cyris69 said:
OK guys, I've waited a while to finally post this but I'm about to toss this device.
So for the past few months USB charging cables no longer stick into the charging port. When you first get the device you could practically flail the phone around by the USB cord. However, now they are so lose I have to tape the cord to the phone to maybe get it just right and charge. The USB slot is looser than a two dollar whore now.
It first started with the factory charger (which died) and never got a replacement (thanks moto)! So got another 3rd party charger and that cable was better but still not tight. Now no cable will stick and is a sloppy mess.
I'm assuming this is going to require a RMA and replacement? Would this even be covered, and considering the RMA for my stock charger months later resulted in no new charger it's worrying too attempt a phone RMA. Let alone the short lifespan of the port. I only plug in ever 1-2 days by the way.
Anyone else having this issue and if so what did you do?
Sent from my XT1575 using XDA Free mobile app
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Click to collapse
Take a look at the two spring loaded prongs on your cable. Are they still pointy and extended? Usually when this happens I notice my prongs have noticeable wear on them
Sent from my SM-T810 using Tapatalk
No, I don't use my phone and cable as a mace or as a personal defense weapon when I play superhero on the weekend However it does have it's home on the nightstand next to the bed with one of my tablets. I haven't dropped or sat on the device whilst plugged in, I have done this with previous phones where it bends the metal on the USB cable but even then hasn't caused a loose port on those devices.
One of the cables indeed has worn down prongs to my surprise for being new, so I looked through my drawers of cables and found one with nice shiney new prongs. This does make locking in place more efficient in my case but not like it was new. You can still fairly easily loose connection moving the device around while plugged in but not instant disconnect from gravity like the stock charger or the other cables.
I would check the charging port for lint. This can cause a cable not to stay in. Simply take a piece of tape and roll it back onto itself with the sticky side out making sure it's the right side to fit in the port. I've done this with several devices and it makes a big difference.
Sent from my iPhone using Tapatalk
Could my work on my XT1575 cause the phone to charge very slowly? As long as I was using a good QC3 charger and a QC3-certified micro USB cable my MXPE phone charged fast. I have TWO working XT1575s. When plugged into the same charger with the same USB cable they both showed "Turbocharging" and both charged quickly.
Last week I replaced the back of one of the phones. -- exchanging the original back with an ebony wooden back. I had problems getting the ebony back to stay completely adhered so I installed it, removed it, installed it again with better adhesive. looks fine now.
Now, the back is securely in place BUT THE PHONE WON'T CHARGE FAST ANYMORE. Could I have damaged something in the phone while doing all that heating during the back replacement? I use a heat gun, always on the low setting, but I for the last installation I moved the heat pretty slowly around the back to increase the heat and hopefully improve the adhesion.
Everything about the phone works perfectly, both hardware and software. When I plug in a charging cable is shows "Turbocharging" but the charge time estimated by the phone is 7 or 8 or even 9 hours. That's about how long it takes too. And the phone won't charge past about 90%.
I've already replaced the battery. I have no idea how to further diagnose the problem. Have I effectively destroyed my phone while putting on a prettier back (to summarize how stupid I'd feel)?
lesdense said:
Could my work on my XT1575 cause the phone to charge very slowly? As long as I was using a good QC3 charger and a QC3-certified micro USB cable my MXPE phone charged fast. I have TWO working XT1575s. When plugged into the same charger with the same USB cable they both showed "Turbocharging" and both charged quickly.
Last week I replaced the back of one of the phones. -- exchanging the original back with an ebony wooden back. I had problems getting the ebony back to stay completely adhered so I installed it, removed it, installed it again with better adhesive. looks fine now.
Now, the back is securely in place BUT THE PHONE WON'T CHARGE FAST ANYMORE. Could I have damaged something in the phone while doing all that heating during the back replacement? I use a heat gun, always on the low setting, but I for the last installation I moved the heat pretty slowly around the back to increase the heat and hopefully improve the adhesion.
Everything about the phone works perfectly, both hardware and software. When I plug in a charging cable is shows "Turbocharging" but the charge time estimated by the phone is 7 or 8 or even 9 hours. That's about how long it takes too. And the phone won't charge past about 90%.
I've already replaced the battery. I have no idea how to further diagnose the problem. Have I effectively destroyed my phone while putting on a prettier back (to summarize how stupid I'd feel)?
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Click to collapse
Either you have a cheap low quality battery or you probably burnt it up with the heat gun. The NFC pad is on top of the battery if that still works then I highly doubt anything else was damaged but I could be wrong. Worse case scenario you desoldered something on the motherboard but I doubt it. First check the wattage on your wall charger if it says 5 volts and 1 Amp then that's your issue. Most wall chargers or USB ports I use have to be at least 5 volts and 2 amps or it will not charge and it'll actually get stuck at 90% like in your case because the charge rate slows down after 80% I believe and a crap wall charger won't have enough power to charge the phone like a high quality OEM wall charger would.