[Q] Nexus 7 does not charge while on.

darksonic · Nov 20, 2012

My Nexus 7 is no longer charging while turned on. If I power it off it'll charge with the battery symbol. I can't even get my PC to recognize it while plugged in to USB. I'm using the stock charger and cable. Any thoughts?

I'm currently running Paranoid Android 2.54, however when this started I was on 2.50. I thought flashing a newer version might help.

Odinbear · Nov 20, 2012

Not charging

Plus 1 on this issue,

Running stock ROM and it updated yesterday to version JOP40C now it's only charging when turned off.

Charl0 · Nov 20, 2012

+1, same here, but now it won't charge as the battery got completly drained.

darksonic · Nov 23, 2012

Still does not charge. This is a launch N7, curious if Google will replace it.

Sent from my Nexus 4 using xda app-developers app

simms22 · Nov 23, 2012

I just received a replacement seven this week for the same issue, mine stopped charging. I called google play customer service, and they didn't give me a hastle at all.

darksonic · Nov 23, 2012

Were you rooted/running a custom ROM? I am, and with my N7 not getting recognized I feel like flashing back to stock might be problematic.

Sent from my Nexus 4 using xda app-developers app

simms22 · Nov 23, 2012

darksonic said:
Were you rooted/running a custom ROM? I am, and with my N7 not getting recognized I feel like flashing back to stock might be problematic.

Sent from my Nexus 4 using xda app-developers app

yea, rooted, custom ROM and kernel. doesn't matter though, it just started one day randomly. I finally did get it to charge BTW, by giving it a few firm smacks on the back. they didn't even ask if it was with root or if it was a custom ROM. if its hardware related, it won't make a difference. i sent it back with twrp recovery, rasbean jelly rom, and trinity kernel. i did wipe the data and the storage before i sent it in.

NathanRandom · Nov 23, 2012

Yeah my Nexus' charging is messed up since 4.2. Battery seems to run down extremely quickly (around 30% in two hours with Spotify on and general browsing.) Plugging it into the wall with the official charger sometimes charges it EXTREMELY slowly, and sometimes just says its charges and still the battery is running down.

It happened to charge last night, and over the course of around 10 hours, I think I had 60% battery. Trying to charge now, and nothing, just losing battery. No idea what the issue could be. Tablet completely stock.

Sent from my Nexus 7 using xda app-developers app

blebla · Jan 3, 2013

+1 on this issue. N7 isn't charging when turned on, no charging issues if turned off. It isn't recognized when connected to a PC. Whenever I try switching users, the darn thing restarts itself. It does the same thing when I try USB debugging. I am running 4.2.1.

Please help!

__Adam · Jan 3, 2013

Investigated problem

After upgrading to 4.2.1 my N7 charged very slowly. Finally today I decided to investigate it, albeit inaccurately.

Plugging a 2A charger into my 120V power monitor, I noticed the following:

When the N7 was on, the power draw continually alternated between 0 watts and 2 watts.

When the N7 had been shut down from the bootloader (not from the OS) and the cable plugged in/out, the power draw was a constant 2 watts.

The max charging rate of the N7 is around 10 watts.

So it looks like the N7 is will charge either very slowly, or kind of slowly. What I find strange is that this issue only occurs on some devices. Perhaps later devices use a different charging controller?

Either way, would really like a fix for this.

najaboy · Jan 3, 2013

__Adam said:
After upgrading to 4.2.1 my N7 charged very slowly. Finally today I decided to investigate it, albeit inaccurately.

Plugging a 2A charger into my 120V power monitor, I noticed the following:

When the N7 was on, the power draw continually alternated between 0 watts and 2 watts.

When the N7 had been shut down from the bootloader (not from the OS) and the cable plugged in/out, the power draw was a constant 2 watts.

The max charging rate of the N7 is around 10 watts.

So it looks like the N7 is will charge either very slowly, or kind of slowly. What I find strange is that this issue only occurs on some devices. Perhaps later devices use a different charging controller?

Either way, would really like a fix for this.

From the way you described your test setup, you seem to be measuring the power consumed by the charger itself on a 120 VAC source. The wattage there should be low, albeit still higher than what you're seeing. Along that line, if you ever see it go up anywhere near 10 watts, then something has gone horribly wrong.

Also, the slow charging seems to be peculiar to 4.2 and above, indicating that it is not actually a hardware issue.

AngusTutnbull · Jan 6, 2013

same!

Been having the same problem for a few days now, I was on stock 4.2 and updated today to a custom ROM based off of 4.2.1 and there is still no difference. Anyone found a solution yet?? Its quite concerning especially since I got mine from GameStop in the US then moved to the UK shortly after!

Just wanted to add, before this started I was having the same problem that is talked about here http://forums.androidcentral.com/google-nexus-7-tablet-forum/228706-nexus-7-problem-wont-charge-when-does-screen-goes-dead-pixels-fly-across-screen.html

I figured it was caused by letting the battery drain completely so I opened it up pulled the battery plug out, plugged it back in and charged it till it was full and it continued to work. haven't let it die since.

dasman66 · Jan 22, 2013

Same problem here, stock Nexus 7 running 4.2.1, roughly 2 months old.

It charges when the device is turned off, but will not charge when powered on -- started happening about 2 weeks ago (charged fine previously). This is using the stock brick and cable that came with the tablet.

I have to imagine that this is a software issue and that the next one will have a similar problem -- has anyone else swapped one out and had the problem disappear with the new one?

dave

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[Q] Nexus 7 does not charge while on.

darksonic

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