Database Users

Stuck at bootup

I got my nexus 7 yesterday and straight away unlocked it with adb and flashed cwm and superuser. I've just tried to boot into recovery (turned off, held volume up + down then power, selected recovery) and it's just stuck at the black screen with Google in white and the unlocked logo.
Can't really do a battery bull on these soooo.... any ideas?
Edit: forget it, after about 20 minutes, literally after posting this, it booted back into android like normal <_<
Sent from my Galaxy Nexus using xda premium

alsex87 said:
I got my nexus 7 yesterday and straight away unlocked it with adb and flashed cwm and superuser. I've just tried to boot into recovery (turned off, held volume up + down then power, selected recovery) and it's just stuck at the black screen with Google in white and the unlocked logo.
Can't really do a battery bull on these soooo.... any ideas?
Edit: forget it, after about 20 minutes, literally after posting this, it booted back into android like normal <_<
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Glad you got it working just a little tip tho cause I did something similar and I wiped data and formatted system to flash a new ROM, then I accidentally pressed reboot so I couldn't get into android or recovery cause as of right now you can manually boot to recovery , solution just use the one click method to root and it will take you directly to recovery the you can mount storage and flash a ROM
Sent from my Nexus 7 using Tapatalk 2

[Q] Nexus 7 Boot Loop and no Recovery

Hello,
i need some help.
my nexus 7 is in a boot loop.
please look at youtube
youtube . com/watch?v=z-JbPdhr_1Q&feature=plcp
thanks from germany

verysalty said:
Hello,
i need some help.
my nexus 7 is in a boot loop.
please look at youtube
youtube . com/watch?v=z-JbPdhr_1Q&feature=plcp
thanks from germany
Click to expand...
Click to collapse
Unplug your device. Hold the power button until it turns off. Then hold volume up, volume down, and the power button. It should boot you into recovery.
Sent from my SAMSUNG-SGH-I747 using xda premium

I'm sure there are more ways to deal with this, but I personally would just flash a custom recovery from bootloader and re flash the rom. Probably the easiest way to go about it. Others may have a better idea.
Sent from my Nexus 7 using xda app-developers app

NuttyLemonz said:
I'm sure there are more ways to deal with this, but I personally would just flash a custom recovery from bootloader and re flash the rom. Probably the easiest way to go about it. Others may have a better idea.
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
+1 to that

verysalty said:
Hello,
i need some help.
my nexus 7 is in a boot loop.
please look at youtube
youtube . com/watch?v=z-JbPdhr_1Q&feature=plcp
thanks from germany
Click to expand...
Click to collapse
What did you do before? If you flashed a new ROM / Kernel, most likely they are not compatible.

AndDiSa said:
What did you do before? If you flashed a new ROM / Kernel, most likely they are not compatible.
Click to expand...
Click to collapse
nothing.
i was exporting some data from my dropbox to my nexus. after that i lost my icons and had a empty desktop without icons.
after reboot, i was in the loop
my nexus is a stock nexus with 4.1.2 no root.
i will not loose my data

You may have no choice but to flash my friend. Sounds like you had an unlucky gremlin.
+2 to Lemonz post.
Sent from my GT-I9100 using xda app-developers app

NuttyLemonz said:
I'm sure there are more ways to deal with this, but I personally would just flash a custom recovery from bootloader and re flash the rom. Probably the easiest way to go about it. Others may have a better idea.
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
... but if it's still locked, you need to unlock and then you will loose all your data
@verysalty: Did you try already to access the system with adb? Do you have debugging option switched on? Then you could try to do a backup of all your data before.

AndDiSa said:
... but if it's still locked, you need to unlock and then you will loose all your data
@verysalty: Did you try already to access the system with adb? Do you have debugging option switched on? Then you could try to do a backup of all your data before.
Click to expand...
Click to collapse
Sorry, no debungging mod on...
How can i flash my nexus to stock. easy way please.

The easiest way in my opinion:
- unlock boot loader (you will loose all your data!)
- download factory image from Google
- flash the factory image (fastboot or adb)
I am wondering why synchronizing some files with dropbox is causing a boot loop ???
Sent from my Nexus 7 using xda app-developers app

AndDiSa said:
The easiest way in my opinion:
- unlock boot loader (you will loose all your data!)
- download factory image from Google
- flash the factory image (fastboot or adb)
I am wondering why synchronizing some files with dropbox is causing a boot loop ???
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
My Nexus 7 is alife
i have use the nexus 7 toolkit and unlock the boot loader > flash the factory image > lock the boot loader...
1000x thanks for all you help
verysalty from Hamburg, Germany

Had a very similar issue today
Nexus started rebooting in the middle of different apps 2-3 times last night.
charged it overnight, unplugged it and went to class.
Then progressed to rebooting after only 40 seconds after the lock screen loaded from the reboot
40 secs wasn't enough time to do anything in android so after much research this is how I fixed it:
- in the 40 secs that android worked I pressed and held the power button and powered it down to stop the boot loop.
- when it was finally shut down I pressed and held the power and vol dwn buttons til the recovery menu appeared.
- used the vol buttons to select recovery, then pressed power
- When the android with the red exclamation point (!) showed up I pressed power then vol up and released for the menu to appear.
- Selected and execute Factory Reset. Then wipe Cache. then reboot, fixed the problem so far, now I'm re-installing apps.
I talked with a google rep about the problem, said it could me anything from a poorly written app, to a corrupted boot sequence.
Anyone know what may have caused this, so I don't inadvertently cause it to happen again??
-----------------------------------------------
Nook Tablet --> Nexus 7
HTC HD2 --> Razr Maxx

eodelf said:
Had a very similar issue today
Nexus started rebooting in the middle of different apps 2-3 times last night.
charged it overnight, unplugged it and went to class.
Then progressed to rebooting after only 40 seconds after the lock screen loaded from the reboot
40 secs wasn't enough time to do anything in android so after much research this is how I fixed it:
- in the 40 secs that android worked I pressed and held the power button and powered it down to stop the boot loop.
- when it was finally shut down I pressed and held the power and vol dwn buttons til the recovery menu appeared.
- used the vol buttons to select recovery, then pressed power
- When the android with the red exclamation point (!) showed up I pressed power then vol up and released for the menu to appear.
- Selected and execute Factory Reset. Then wipe Cache. then reboot, fixed the problem so far, now I'm re-installing apps.
I talked with a google rep about the problem, said it could me anything from a poorly written app, to a corrupted boot sequence.
Anyone know what may have caused this, so I don't inadvertently cause it to happen again??
-----------------------------------------------
Nook Tablet --> Nexus 7
HTC HD2 --> Razr Maxx
Click to expand...
Click to collapse
I had the exact same issue from your description, I solved it after I read someone else disconnected the battery. Its a pretty quick fix to what looks like an unrecoverable problem loop of switching on, then powering down.
Here's what I did:
Open the back using just my nail on one corner , it snaps off easy pesy, trust me
Use ifixit nexus 7 battery replacement guide , steps 1-6 only, note where they use a tool I used a pair of nail scissors to prise the connector out and back in
http://www.ifixit.com/Guide/Installing+Nexus+7+Battery/9895/1
Pulling the battery out, as with any android device can work.
Total time 2 mins
It was working again before I put the back cover on.

[Q] Hard Bricked Nexus 7. PLEASE HELP!

Recently I have had a major issue with my nexus 7. About 2 weeks ago, it died (ran out of battery) while I was using it. When I attempted to turn it on after charging it, I would get the screen that says google, with unlocked lock icon. The tablet would be frozen at this screen. I left it running until it died again. I was running the latest stable release of cyanogenmod 10 with clockworkmod recovery with no problems before when this happened.
By now I had realized that the nexus may have been bricked. I did some googling and found that this is an issue other users have been having when their battery died on android 4.2.2. I attempted to restore the nexus. At this time I was able to access bootloader on the device by holding down all of the buttons at the same time. I think I selected the recovery option. However, I decided not to restore the nexus, and wait until a time where I would be able to turn all of my attention to the problem, and powered the device off, it may have been in recovery mode at that time but I do not remember.
But now, I can't access the bootloader! When I reboot the device by holding down power, I see the google screen for about 4 seconds, then I get a black screen (I can tell the device is still on because the screen is an illuminated black screen). Black screen remains there indefinitely. Any button combo (voldown+power, volup+power, all 3, volup+voldown (this one doesn't do anything), hard reset combo, etc) doesn't do anything except reboot the device and give me the same behavior.
I connected it to my pc (running windows 8) and used the nexus root toolkit by wugfresh to install some drivers. I could install the first driver the toolkit told me to but not the second because the device wouldn't reboot into bootloader. In device manager I see "Galaxy Nexus ADB Driver", hardware ids are USB\VID_18D1&PID_D001&REV_9999 and USB\Vid_18D1&PID_D001, so that tells me custom recovery. Running "adb devices" tells me the device is in recovery mode, but I just see a black screen. Doing adb reboot bootloader or fastboot reboot bootloader hangs and gives waiting for device respectively. Similarly wug's toolkit hangs when trying to reboot the device into bootloader.
I've opened up the back and done a literal battery pull many times. Battery connector is in place after this. I also accidentally broke off one of those tiny copper tabs next to the battery, but that's not relevant to this problem and I believe is minor, broke that after I got this problem. After I do battery pull and plug back in, I either:
a) get a battery lightning icon in the center of the screen, which begins to fill up after a few moments. Rebooting device gets me back into google then black screen mentioned above
b) get a screen with static/snow on it. There is also a hissing/humming noise coming from the back of it. Rebooting gets me to google screen again. This screen also can appear rarely with no discernable pattern to when it appears.
c) same google screen followed by illuminated black screen.
I've left the device charged in, unplugged it, let battery die, and tried many combos of buttons, but can't get anything except the three screens stated above.
I know the saying "Nexus devices are almost impossible to brick" but if I can't access the bootloader and just get black screen then I don't know if I can fix this.
I've posted a thread similar to this one before, so if your username is bftb0 then you've seen this problem already. I'm trying to repost with more information to see if any other ideas are there. Other thread is http://forum.xda-developers.com/showthread.php?p=39522179#post39522179.
So these are my theories to what the problem is:
-corrupted bootloader
-bug/corrupted clockworkmod recovery
-bad battery/power/overheating
-corrupted memory
So how can I solve this?
I know there is NVFlash but there isn't a version for nexus 7. Almost all of the things I've found involve using bootloader. Any suggestions for things I haven't tried yet?
I have obtained an RMA from Asus but I don't want to send the device in because the bootloader is unlocked, so they would probably not cover this under warranty.
Does anybody know of a way to erase evidence of having a bootloader? Or a way to convince Asus to fix the device even with bootloader unlock? What's the price of the repair if not covered under warranty? I'm a poorish student with not much money, so I hope it's not that much and that's why I'm reluctant to pay for repairs.
Also I haven't done anything stupid like fastboot erase bootloader, in fact I hadn't connected the device to pc in a week.
I think this might be a bug with android 4.2. I love android and nexus, but if this is google's fault then I might be done with Android.
Thanks so much.

if it's still bricked i would be interested in buying it for the screen (even screen only,and you keep everything else) cause mine broke today!

komakos96 said:
if it's still bricked i would be interested in buying it for the screen (even screen only,and you keep everything else) cause mine broke today!
Click to expand...
Click to collapse
Perhaps. I'll try to see if I can RMA it under warranty, probably wouldn't be covered though. I'll consider it.
Anyone else, have ideas for how to fix?

Had that problem before:
I had fixed it by opening the nexus 7 and unplugging the battery,
then I hooked it up to the charger(its screen turned on to a black one with the hissing speaker) and used the power button hard reset it,
The nexus 7 reset and gave me a really glitchy/teary black screen.
Then I unplugged it and replugged the battery and put the whole thing back together (mines tape-fixed BTW) and turned it on
Sent from my Nexus 7 using xda app-developers app

STLset said:
Had that problem before:
I had fixed it by opening the nexus 7 and unplugging the battery,
then I hooked it up to the charger(its screen turned on to a black one with the hissing speaker) and used the power button hard reset it,
The nexus 7 reset and gave me a really glitchy/teary black screen.
Then I unplugged it and replugged the battery and put the whole thing back together (mines tape-fixed BTW) and turned it on
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Still no luck... It just gave me the black screen as before. Thanks though

Hi, can you access bootloader mode???
If you not your Nexus has its /boot partition broken or formatted. That is a "Super brick" is irreversible.
Good luck!
Regards.
Sent from my Nexus 7 using xda app-developers app

/boot is kernel. It has nothing to do with his problem. He can't access bootloader.
Flowed from my HTC branded muffin...

No chance to get a free repair out of Asus right? Know of any way to get them/trick them to repair it for free?
If no, what's the price they'll charge?

Hi stereo8.
/boot is not just the kernel, is the boot loader too, and if he can't boot on boot loader mode we have the problem.
Regards.
Sent from my Nexus 7 using xda app-developers app

MlucianoEze said:
Hi stereo8.
/boot is not just the kernel, is the boot loader too, and if he can't boot on boot loader mode we have the problem.
Regards.
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Excuse me, but stereo8 is right. You should probably read a bit more about the internal structure / partitions of the Nexus7.
Sent from my Nexus 7 using xda app-developers app

Update:
I think my device may just be stuck in recovery. I think I may have accidentally hit the recover button when I was able to access the bootloader. I was running clockworkmod recovery 10. Perhaps it has been corrupted.
How do I get out of the recovery using adb?

Why do you have 2 threads open for this ?
Sent from my Galaxy Nexus

patil215 said:
Update:
I think my device may just be stuck in recovery. I think I may have accidentally hit the recover button when I was able to access the bootloader. I was running clockworkmod recovery 10. Perhaps it has been corrupted.
How do I get out of the recovery using adb?
Click to expand...
Click to collapse
Connect to the usb to pc and use the adb command" adb reboot bootloader "
Sent from my HTC Sensation XE with Beats Audio Z715e using xda premium

heavy_metal_man said:
Connect to the usb to pc and use the adb command" adb reboot bootloader "
Sent from my HTC Sensation XE with Beats Audio Z715e using xda premium
Click to expand...
Click to collapse
I've already posted that I've tried that. The device just powers off and doesn't power on again. Turning it on with any combination of buttons puts me back in the google screen then black screen.

patil215 said:
I've already posted that I've tried that. The device just powers off and doesn't power on again. Turning it on with any combination of buttons puts me back in the google screen then black screen.
Click to expand...
Click to collapse
Ok, while the device is registered as "recovery" open a cmd and cd to your adb set up.
Try using the commands
Adb shell
#wipe data
This should wipe all user data from the tablet, maybe even the sdcard/internal memory as well. I am looking to see if you can use and to flash a bootloader for you, but it would carry heavy risks.
Sent from my HTC Sensation XE with Beats Audio Z715e using xda premium

Nexus 4 with Broken Soft Keys, Stuck on TWRP

I am stuck on the TWRP screen after I went into the Bootloader.
My problem is that the soft keys on my Nexus 4 stopped working a few months ago. How do I get out of the TWRP screen?
EDIT: Never mind. I panicked. Just held Power + Volume Down and rebooted. Sorry.

abpat2203 said:
I am stuck on the TWRP screen after I went into the Bootloader.
My problem is that the soft keys on my Nexus 4 stopped working a few months ago. How do I get out of the TWRP screen?
EDIT: Never mind. I panicked. Just held Power + Volume Down and rebooted. Sorry.
Click to expand...
Click to collapse
What do you mean soft keys don't work?
In TWRP? You should reflash the recovery, or a newer version.

The Home, Last Apps and Back soft key on my Nexus 4 stopped working a few months ago. Seems like a borked digitizer that has been plaguing a lot of Nexus 4 owners. Only that 1 cm area of the screen doesn't work.
So instead of having to pay to replace it, I decided it would make more sense to get a Gesture Control app that would allow me to use the same functions as that offered by the soft-keys, albeit anywhere on the screen. As most of these apps need a root, I started rooting my phone using the Nexus Root Toolkit.
Everything was fine until I went into FastBoot and the TWRP screen came up. While the toolkit was displaying "Waiting for device" and I foolishly clicked on one of the options on the TWRP screen and it took me into the File Directory. Now I could not find a way to get out of it as the only option seemed to be click on the "Back" soft key, which is not working on my phone. Hence the panic and the post.

Data recovery after brick?

My phone bricked itself out of nowhere. I bought it 2 years ago and since all I did weird is install NovaLauncher right when I got it and replace a broken screen with a new one after one year. Since then, it worked just fine until 4 weeks ago.
While watching TV I heard a buzz on the desk. It was my phone giving me the "Your device is corrupt and cannot be trusted" screen out of nowhere. After it powered off, I tried booting it back up. It gave me the same message, so I pressed power to continu. The phone then booted up normally. I tought: "that was weird". The phone worked like nothing happened until last monday. I was having issues with it and decided to reboot it since I didn't do it in a couple days. Then the message appeared but this time, it won't boot. It shows me the Essential logo, after a minute turns into the loading logo (the dots forming a circle) then reboots, giving me the same error message. It also says that it cannot boot and I should factory reset if this goes on.
Today I ordered a new phone but I want some of my data back from the Essential if possible before trying a factory reset. I have audio that I recorded using the Voice Recorder app and I really need those. Photos/video and music are already cloudbased so this doesn't matter, but the recordings are important.
Is there a way I can recover this data using recovery mode or something?
Thank you for your time.

Try booting while holding both the "power" and "volume down (or volume up)" buttons. Perhaps you can get to the bootloader and fastboot...
Sent from my PH-1 using Tapatalk

eKeith said:
Try booting while holding both the "power" and "volume down (or volume up)" buttons. Perhaps you can get to the bootloader and fastboot...
Sent from my PH-1 using Tapatalk
Click to expand...
Click to collapse
I can get to the fastboot menu yes. What do I do after that? I've never done this before

Dufius said:
I can get to the fastboot menu yes. What do I do after that? I've never done this before
Click to expand...
Click to collapse
You could try reflashing firmware, just skip the erase user data step
Sent from my ocean using XDA Labs

sd_shadow said:
You could try reflashing firmware, just skip the erase user data step
Sent from my ocean using XDA Labs
Click to expand...
Click to collapse
ok. How do I do that? I tried to search the forum but couldn't find the right thread