Database Users

Stupid stupid mistake!

I think I have fried my Nexus 7.... didn't even think about what I did how stupid am I....
I decided to wire up a Hella connector to a USB cable the idea being to plug it into my phone for charging on the road... I then had a not so smart idea to use my OTG cable to connect the USB A connector to my Nexus 7 to see if it worked...
Nexus 7 booted past the bootloader and then nothing.... I realised then how stupid I had just been...and still nothing...
Presumably I've run a shed load of power down one of the data line..... what a fool.....
ARGH!!!!!!! anything I can possibly do to salvage it.... please!! :crying::crying::crying:

you could try something ASUS support told me, press all buttons (volume + & -, power) for 30 seconds, and if it won't boot after that, you should get a RMA

chiwou said:
you could try something ASUS support told me, press all buttons (volume + & -, power) for 30 seconds, and if it won't boot after that, you should get a RMA
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Click to collapse
Going the RMA route would be costly. If it is dead, he'd be better off just bring a new N7.
Sent from my Nexus 7 using Tapatalk HD

Thanks for the suggestion but no it hasn't worked...
I've had the N7 plugged into the charger for the last 30 minutes or so and when I went back to it the screen backlight was on slightly (you can see if you look at the screen from the side)... but the whole unit was really really hot... I've obviously disconnected it but now can't get the thing to turn off, if I hold down the power button the screen flicks off but then back on.
:crying::crying::crying::crying:

najaboy said:
Going the RMA route would be costly. If it is dead, he'd be better off just bring a new N7.
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Click to collapse
I would think that "broken display” units on eBay/CL probably have working mobos and batteries, as the owners are trying to dump them because of the broken screen. But, buying used is a crap shoot.
Nice that Google is selling N7s at cost (or even a loss) - but it does mean that any oem component replacements will be a significant fraction of the original price.

I was reading in Play Books when my N7 shut down due to low battery. I plugged it in and it wouldn't charge or boot and I noticed a faint light bleed and faint dots streaming from right to left on the display. I tried things like holding the power button for 30 seconds to reset, holding vol down and power to try to get to recovery, but it wouldn't take. Finally, with it plugged in, I held down the power button for just about 10 seconds and backlight and dots stopped. A few seconds later without pressing anything, it booted up. It would start to charge, but if the screen timed out, I was back to the earlier state and it wouldn't come on. So I got it started again and immediately went to developer options and checked Stay Awake while plugged in. Eventually the charge built up and I'm back to normal, at least my N7 is normal. I only mention this because the OP talked about the faint backlight and it may be worth trying.

busterdan said:
Thanks for the suggestion but no it hasn't worked...
I've had the N7 plugged into the charger for the last 30 minutes or so and when I went back to it the screen backlight was on slightly (you can see if you look at the screen from the side)... but the whole unit was really really hot... I've obviously disconnected it but now can't get the thing to turn off, if I hold down the power button the screen flicks off but then back on.
:crying::crying::crying::crying:
Click to expand...
Click to collapse
A standard hella charger outputs 5V at 2A which is the same as your N7 original wall charger.
I doubt your problem came from the charger, it might be softbrick at an unfortunately moment.
I came across a similar problem when i was editing a custom kernel.
If you tried every method to shut down the device and failed do the following:
1. Open the case (it's quite easy to open with a plastic card)
http://www.ifixit.com/Guide/Installing+Nexus+7+Battery/9895/1
2. Unplug the battery and hold the power button 30 seconds (with the battery detached)
3. Let it soak for 10 minutes
4. Reconnect the battery and close the lid.
5. Put your nexus 7 in the wall charger, and you should see the battery bar on the screen.
After that, let it charge a few minutes and boot the device.

[SOLVED] Help - Brand new N7 having boot issues

Hacking noob here. As in never. Sorry if this is "yet another annoying noob" issue.
I just got an N7 today and I'm having boot issues. I was able to use the device initially, I got it setup and it charged to 100% earlier. Then I did my first shutdown in order to investigate the bootloader. Since then it has been difficult to get it to power on.
The device is brand new, stock, and nothing done to it, other than user setup, and USB Debugging has been enabled. And I haven't dropped it or gotten it wet or dusty or anything fail you might be thinking of. No crazy apps, not rooting ,etc.
Reading up, it sounds like I need to power off the device, then simultaneously press Vol Up, Vol Down and Power (for some amount of time) in order to get into the bootloader /recovery menu.
This does not happen. Nothing happens.
So I tried to power the device back on. It doesn't.
I plug in the USB cable and I don't see the charging icon appear.
I notice a possible discoloration near the usb port, which could simply be the spot where the notification led is, but there is a visible "spot" that can be seen there. Wondering if this is an indicated that something is fried?
After messing around with cables and random button pressing I have gotten it to boot a couple of times, and seen the charge icon a couple of times, but I'm starting to suspect that this device is effectively DOA. Its been charged sufficiently (>60%) ever since I got it.
1. Anyone have any advice on this? I have no plans to wipe the device, I wanted to actually investigate sideloading the OTA. Answer - Ignore this.
2. Am I missing something? Is there a different/specific order of operations to start it? Answer - Bobos will fail.
3. Does it matter if USB power is connected while trying any of this? I've tried 3 different sources. And none provide a consistent state. Answer - No.
4. Can anyone else confirm this "discoloration" is visible at this spot? (halfway between the bottom center and the display area) Answer - Its just the notification led.
UPDATE: Turns out that pressing all 3 buttons causes a portal to another planet to open over Manhattan. Do not do this.
Instead simply press Power + VolDown to get to the bootloader.

I expect you have a defective device. However, you might just be doing weird things with your buttons.
To get to the bootloader, you just need to hold down the power button and volume down button. You don't need to have the microUSB cord plugged in.
For simply booting up the system: there have been times when I've had to hold the power button down for a while in order to get the device to boot up.
Sent from my Nexus 6 using Tapatalk 4

You need to hold the power button down a few seconds to turn on.
Boot loader is Power+VolDown
The discoloration is the notification led.

Thanks for the replies! I was able to finally get into the bootloader menu by following xdhall's instructions. And from there, into Recovery. Since using this method I'm not having any power on issues. It may be a "bug" in how it registers button presses, because it definitely isn't acceptable to have my experience occur (no usb charge, etc)
On to trying to update to 4.4 via the OTA recovery method. Google can't stop me now.
Thanks to sfhub for speaking to the discoloration. I really wasn't sure if I saw it before this issue started. Better to panic and ask, then assume and fail.
Oh yeah, don't press down all 3 buttons for 10 seconds from power off, it does wierd things.

I have issues getting it to power on once in a while too. Have to leave it for a while or put it on charge for a while and then the power button works.
Sent from my Nexus 7 (2013)

I was just about to ask a similar question. Many thanks to zenrage for doing the work for me.
Sent from my SPH-L710 using XDA Premium 4 mobile app

BreakShadow said:
I have issues getting it to power on once in a while too. Have to leave it for a while or put it on charge for a while and then the power button works.
Sent from my Nexus 7 (2013)
Click to expand...
Click to collapse
If you get the blinking LEDs, that is because the power is drained too low.

No blinking LED,just doesn't boot always at any battery level whatsoever. No issues with the buttons, they work fine when on. Untouched and locked system.
Sent from my Nexus 7 (2013)

BreakShadow said:
I have issues getting it to power on once in a while too. Have to leave it for a while or put it on charge for a while and then the power button works.
Click to expand...
Click to collapse
I had that too...returned it.
It was totally random...and would shut down by itself at random even though I charged it recently. I think it's an issue w/ the battery level sensor because to get it to boot, I'd have to plug it in for 15min, then power it up...
My old N7 2012 never had that quirk

I'm glad you were able to solve your problem with your nexus 7! I hope you enjoy it!
Sent from my Nexus 5 using xda app-developers app

[Q] Sprint Galaxy S5 Not Powering On

Can someone please give me some advice on what to do. My phone is less than 3 months old and will not power on. It doesn't do anything, not even the vibration it usually does. I've tried plugging it into the charger but it doesn't even have the charging light on. It was working fine and just stopped. I pulled the battery out and put it back in but nothing it working. If If anyone has any suggestions, I would be very grateful! Thanks!!!

what were you doing at the time
What were you doing at the time the phone stopped working? Did you try charging the battery on an external charger?

As the poster above suggested, what were you doing recently? We are looking for clues as to what happened? Did you yank on the power cord, drop the phone, et cetera?
Make sure that your battery isn't in backwards in the phone and try using a different cable to charge the phone. If it still doesn't charge, then borrow a friends external charger.. or even the (charged) battery out of their S5 for a few seconds to see if your phone will turn on. We're trying to differentiate between a dead battery and all other problems.
If you still have no luck, then remove the battery for ten seconds, then replace (the presumably charged) battery in your phone. Then press and hold the volume down key. Then also press and hold the home key, then the power key. After about five seconds, you should see the phone start to the "download screen". If so, post here for further guidance.
If you phone is non responsive to a borrowed battery and the download mode described above, then you should seek warranty service with your carrier. A three month old phone should still be under warranty.
.

goddie392 said:
What were you doing at the time the phone stopped working? Did you try charging the battery on an external charger?
Click to expand...
Click to collapse
I was talking on it and hung up. Then, I tried to use it about 5 mins later and it wouldnt turn back on. What do you mean by "external charger"?? Sry, I'm not very tech savy lol! The only charger I have is the one that came with my phone. Thank you for replying! ☺

fffft said:
As the poster above suggested, what were you doing recently? We are looking for clues as to what happened? Did you yank on the power cord, drop the phone, et cetera?
Make sure that your battery isn't in backwards in the phone and try using a different cable to charge the phone. If it still doesn't charge, then borrow a friends external charger.. or even the (charged) battery out of their S5 for a few seconds to see if your phone will turn on. We're trying to differentiate between a dead battery and all other problems.
If you still have no luck, then remove the battery for ten seconds, then replace (the presumably charged) battery in your phone. Then press and hold the volume down key. Then also press and hold the home key, then the power key. After about five seconds, you should see the phone start to the "download screen". If so, post here for further guidance.
If you phone is non responsive to a borrowed battery and the download mode described above, then you should seek warranty service with your carrier. A three month old phone should still be under warranty.
.
Click to expand...
Click to collapse
My battery was charged in the 70% and I also used my husbands battery (we have the same phone) but that didnt work either. I'm going to try your other suggestion. Thanks!

melissadf79 said:
My battery was charged in the 70% and I also used my husbands battery (we have the same phone) but that didnt work either. I'm going to try your other suggestion. Thanks!
Click to expand...
Click to collapse
Can you get into recovery ( volume up + menu +power button) or download mode (volume down + menu + power button)?
You may read this article http://www.technobezz.com/samsung-galaxy-s5-not-charging/, hope it helps.

I tried the volume down + home + power and it didn't work. I'm not sure what to do. I don't want to make a trip to the store but it's looking like I'm going to have to.

melissadf79 said:
I tried the volume down + home + power and it didn't work. I'm not sure what to do. I don't want to make a trip to the store but it's looking like I'm going to have to.
Click to expand...
Click to collapse
It may well be an electrical hardware issue, it doesn`t look like a software problem to me. Good luck and i hope its fixed soon

melissadf79 said:
I tried the volume down + home + power and it didn't work. I'm not sure what to do. I don't want to make a trip to the store but it's looking like I'm going to have to.
Click to expand...
Click to collapse
It is looking like a hardware issue. If you are positive that the battery is charged.. i.e. if the battery turns your husband's phone on, then we ask what is different about your phone? Most software issues would be bypassed by starting a phone in download mode, which is why I asked you to try that.
Have a quick look at the battery "fingers" or pins on your phone. Those are the gold or silver coloured pins that line up with the gold or silver tabs on the end of your battery. Do they all appear to be the same? There isn't one that is bent out of alignment or shorter than the others where it might not be making contact with the battery?
And why not try one more test? See if the phone will start up in "recovery mode" this time.
Pull the battery out of the phone for ten seconds. Then replace it. Now in order.. press and hold the volume up button, then press and hold the home button as well. And last, press and hold the power button. Continue holding all three for ten seconds or until you see the phone screen turn on.
If that still doesn't work, my best guess is that you may have accidentally banged and damaged the power button. If it was me.. I'd try pressing really hard and wiggling the power button for a few seconds to see if you can cajole the phone to power on at least once and confirm the problem.
But that is about all that we can do. If you can't get the phone to power up with a known good battery.. then th store needs to check it with test equipment to narrow down what the hardware fault is.
.

blinking red light, phone seems dead

Just want to say I have done a lot of reading and testing before posting here. Disconnecting/reconnecting the battery, all possible button combinations, charging the battery externally (for good measure, it wasn't dead, tested with a multimeter).
This is my daughters phone, it simply shut off and refuses to turn on. However plugging it in makes it blink red. When plugged into the computer into a usb2 port it blinks red 7 times. When plugged into the wall it will blink red 11 times. The only plausable explanation of this I have found is this post http://forums.androidcentral.com/go...ed-light-follows-motherboard.html#post3719526 and this image which is the supposed fix https://i.imgur.com/WewiGBe.png .
Any more ideas before I call this thing officially dead? Btw well past it's warranty, so I can be pretty invasive in fixing it since it's really just a brick right now.

baconbacon said:
Just want to say I have done a lot of reading and testing before posting here. Disconnecting/reconnecting the battery, all possible button combinations, charging the battery externally (for good measure, it wasn't dead, tested with a multimeter).
This is my daughters phone, it simply shut off and refuses to turn on. However plugging it in makes it blink red. When plugged into the computer into a usb2 port it blinks red 7 times. When plugged into the wall it will blink red 11 times. The only plausable explanation of this I have found is this post http://forums.androidcentral.com/go...ed-light-follows-motherboard.html#post3719526 and this image which is the supposed fix https://i.imgur.com/WewiGBe.png .
Any more ideas before I call this thing officially dead? Btw well past it's warranty, so I can be pretty invasive in fixing it since it's really just a brick right now.
Click to expand...
Click to collapse
If you have to junk it, Expansys has a deal where you can get a remanufactured N4 8G is 129.99/ 16G is 149.99 http://www.expansys-usa.com/google-...9aU-aXzeibXDvErq.KMVvZ4neA&ito=LKSTM20TXf59aU or you can get both a 16G AND a Gen 1 N7 for 179.99 http://www.expansys-usa.com/google-...rtphone-bundle-16gb-tablet-16gb-phone-269434/
I took the N4 offer the other week, and all is well.

You could try a new battery. It could be that the cable is damaged, or something in the circuitry is damaged.

Found someone with a broken screen, going to borrow it and try his battery.

baconbacon said:
Found someone with a broken screen, going to borrow it and try his battery.
Click to expand...
Click to collapse
did the battery swap work? My GF's n4 has the same issue.
Battery tests at 3.72 volts, no button combos work, if I hold power and plug in usb get a solid red followed by similar blinking pattern.
She will flip if it is dead (luckily pics are auto backed up of the baby)
If a battery swap works, I will be all over a new battery.

On YouTube there is a video of the guy who had the same issue... He came up with a good solution.. Search "nexus 4 red light of death"
Sent from my Nexus 4 using XDA Free mobile app

I figured mine out last year. I don't have it anymore. But. I held power down for like 30 plus seconds. Then while the charger is in phone plug into wall. In that order. Fixed it. Seems the phone gets in a deep hibernated state.
Sent from my LGLS990 using XDA Free mobile app

thanks for the response, I have tried pulling the battery, button combos, holding the power button for up to 20 minutes, vol down plus power, vol up plus power, vol up and down plus power.
Swapping cables, usb ports, wall chargers everything that every site / forum has suggested.
The only thing I haven't done is swap the battery, and since I have the same led blink combo as OP, if a battery swapped fixed him, it is worth spending the money, otherwise I am wasting $30 bucks.
Other posts have suggested the blink combo (7 usb / 10 power) might be a pmic chip going bad so I don't want to waste money on a battery if it didn't work for OP.

A different battery changed nothing.

baconbacon said:
A different battery changed nothing.
Click to expand...
Click to collapse
thanks for the update, yeah I bit the bullet and got my GF a moto G 2014. Not quite as nice as the nexus 4, but I got a good price on it.

Broken power button and vol-down, options?

A friend of mine has just let me know the power button of her Galaxy A40 is dead. The volume down was already dead so before I provide any advice I'd like to hear from the device owners here. I have zero experience with Sammy myself.
I've already suggested Volume Styles to control volume on screen and Quick Settings to plant a handy shortcut to the power menu in QS. Other tips are most welcome! I've got two specific questions:
When this device is off and plugging in the charger, does the system boot or does it just go to a charging animation?
When this device is off and the volume-up key is pressed while plugging in the charger, does it go to fastboot?
Thanks for reading!

Powered off, charger attached, it charges no boot.
She will need to replace the power button. They all are probably one assembly.

blackhawk said:
Powered off, charger attached, it charges no boot.
She will need to replace the power button. They all are probably one assembly.
Click to expand...
Click to collapse
Oh no no no, if that happens then the one that will be replacing that power button will be ME and we don't want that to happen. If she can get to fastboot, she can boot the damn thing on her own
Currently there's no problem though, I'm just wondering what happens if the battery dies or she accidentally shuts it off.

Timmmmaaahh! said:
Oh no no no, if that happens then the one that will be replacing that power button will be ME and we don't want that to happen. If she can get to fastboot, she can boot the damn thing on her own
Currently there's no problem though, I'm just wondering what happens if the battery dies or she accidentally shuts it off.
Click to expand...
Click to collapse
As far as I know the power button is the only way to power it up.
Lol, you knew the job was dangerous when you took it
Watch some vids, it may not be as bad as you think. Sooner or later it's gonna happen...

There's no harm in getting a quote from a local repair shop (hopefully there's a few options for you!). I had someone replace the speaker after it broke for £15/~$17 total.