Database Users

[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] HELP!! 4.4 update

i tried to update to 4.4 through factory image files and i wounded up getting stuck on the nexus symbol and it wont boot up!!
i tried then going to recover mode but its not even doing that! the furthest i can get is into fastboot mode and when i go to recovery mode theres just the red triangle with no menu at all.. just the picture with the red triangle.. all i can do from there is hard reboot
so the situation is..boot stuck and no recovery
thanks for the help!

Well you should be fine. The little red triangle is normal, it is the screen you get before it goes to stock recovery. If you were to google that, you'd see you need to depress the power button and the volume up buttons at the same time. You keep them pressed together for about 4-5 seconds before it goes into recovery. Once you do that do a factory reset and see if that works.
BTW when you post like this make sure you include a little more detail how you got to where you are. Like what operating system you are using, Windows _, Ubuntu __._, or IOS. Also if you were using a tool kit. If you have ADB and Fastboot installed, etc., helps w/ the diagnosis if you know what I mean.

jawmail said:
Well you should be fine. The little red triangle is normal, it is the screen you get before it goes to stock recovery. If you were to google that, you'd see you need to depress the power button and the volume up buttons at the same time. You keep them pressed together for about 4-5 seconds before it goes into recovery. Once you do that do a factory reset and see if that works.
BTW when you post like this make sure you include a little more detail how you got to where you are. Like what operating system you are using, Windows _, Ubuntu __._, or IOS. Also if you were using a tool kit. If you have ADB and Fastboot installed, etc., helps w/ the diagnosis if you know what I mean.
Click to expand...
Click to collapse
i know what stock recovery mode is and how to get to it.. its just that it doesnt show up .. just the picture with no options
anyways.. i figured out how to flash stock recovery from fastboot mode but every stock i try to flash i keep getting a bootloop!

namnam123 said:
i know what stock recovery mode is and how to get to it.. its just that it doesnt show up .. just the picture with no options
anyways.. i figured out how to flash stock recovery from fastboot mode but every stock i try to flash i keep getting a bootloop!
Click to expand...
Click to collapse
Maybe your factory image is corrupted. I downloaded the factory image from Google, checked the MD5 to make sure it was right, and then flashed it with no problem.

wipe data / factory reset on STOCK recovery.

https://www.youtube.com/watch?v=kFqZ7z4ZeLY&feature=youtube_gdata_player
Sent from my Nexus 4 using xda app-developers app

i had the same problem.. n then i found the solution by flashing it through toolkit follow here i made a video
http://forum.xda-developers.com/showthread.php?t=2531374
Sent from my Nexus 4 using xda app-developers app

Locking and then unlocking the boot loader has worked for several including myself
Sent from my Nexus 4 using XDA Premium 4 mobile app

[Q] No command issue?

Hello, I was going to try and restore my Nexus 4 back to It's original state. I went into the bootloader and selected the recovery mode option, the Google screen comes up then right after, I see a sleeping android with a red triangle box on top and it says no command. Then the phone shuts down. Any solutions on how I can fix this? I'm really new to the nexus 4. Thanks.
Sent from my Incredible 4G LTE using XDA Premium 4 mobile app

That's stock recovery.
Once at that screen do some button mashing ( I think It's power and volume down to bring up stock recovery options but I can't remember for sure) and your options show up.
If you wanted a custom recovery you would need to flash that with fastboot. Or from within android if you're on a rooted device.
Also depending on exactly what you want to do flashing the factory images may be what you want. That will by default wipe EVERTHING of the phone and start completely fresh with stock images. There is guides for that in general...

Boot Certification Verify?

Hi guys, need some help deperately please.
I've got an LG G2 D802 that has received the OTA update to 4.4 and is running fine.
I've since rooted it and i was looking at installing a custom recovery before flashing a new Rom......
I have tried to use Flashify after downloading TWRP recovery through Flashify but after rebooting it comes up with the following in the top left of a black screen;
Error: Boot Certification Verify
810 - secure booting error
860 - cause: boot certification verify
Then the screen goes off, ive left the phone and tried to reboot by just holding down the power button for 10 seconds but on boot i just get the same message then it dissapears and i get a black screen again
Any help or pointers would be great - thanks in advance

Try going to download mode and flash your kdz.
Sent from my LG-D802 using XDA Premium 4 mobile app

bender_007 said:
Try going to download mode and flash your kdz.
Sent from my LG-D802 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thankyou for the reply - Any chance you could link or give me a quick tutorial on how to do this please?
I've connected the lg g2 up to my pc via usb and held down volume up and power to get into download mode - i get the screen on the lg with 'Firmware Update' on it and a bar with 0% on it and writing that says "DO not unplug the USB connection until the process is complete.
I've located the kdz for my particular device/model and downloaded it on my pc - how do i flash to my phone from here please - simple step by step instructions would be great thanks!

Of course. Please read this thread and if any troubles occure write here
P.S. disable Antivirus before proceeding.

bender_007 said:
Of course. Please read this thread and if any troubles occure write here
P.S. disable Antivirus before proceeding.
Click to expand...
Click to collapse
Thanks ever so much for your help - my phone is back alive but lost its root! But because the lg g2 is so easy to root its no problem!
Thanks again my friend - you are worth your weight in gold - all the best

wolverine73 said:
Thanks ever so much for your help - my phone is back alive but lost its root! But because the lg g2 is so easy to root its no problem!
Thanks again my friend - you are worth your weight in gold - all the best
Click to expand...
Click to collapse
Thank to the thread OP where all the infos are
Sent from my LG-D802 using XDA Premium 4 mobile app

bender_007 said:
Thank to the thread OP where all the infos are
Sent from my LG-D802 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Have done!
Well ive tried to root again using ioroot 25 like i did initially but my phone doesnt like it at all
I get the little green android with the spinning thing on him but it doesnt go any further than that when i run the Windows Batch File - so going to do the whole process again - frustrating to say the least :/

wolverine73 said:
Have done!
Well ive tried to root again using ioroot 25 like i did initially but my phone doesnt like it at all
I get the little green android with the spinning thing on him but it doesnt go any further than that when i run the Windows Batch File - so going to do the whole process again - frustrating to say the least :/
Click to expand...
Click to collapse
If you've just flashed the KDZ, do a factory reset instead of just booting to android. (hold volume down + power until you see the lg logo, release for a moment and continue holding the 2 buttons untill the factory reset appears). If you're on the new base with knock on and the ioroot issues the reboot to recovery command it has the same effect, your data is cleared. You have to retry the rooting process (the second time it should work).

bender_007 said:
If you've just flashed the KDZ, do a factory reset instead of just booting to android. (hold volume down + power until you see the lg logo, release for a moment and continue holding the 2 buttons untill the factory reset appears). If you're on the new base with knock on and the ioroot issues the reboot to recovery command it has the same effect, your data is cleared. You have to retry the rooting process (the second time it should work).
Click to expand...
Click to collapse
I've finally sorted it out now - on the first flash of the kdz my phone pretty much remained the same, it bought it back to life and it wasnt reset at all and i couldnt root it.
On the second flash of the kdz my phone went through the whole set up process again (enter google account, language etc) and i managed to root easily after that.
It's put me off installing a custom recovery now though Ive expereince with the htc one x, dell streak, zte blade ...... all fine but with this im worried about getting a recovery installed incase i mess up again!
I know there is TWRP recovery and Philz recovery available but using flashify was what got me into this mess - do you suggest i use the usb cable and connect to my pc and install a recovery that way?
Side note - ive downloaded TWRP and Phils recoveries but none of them have a Windows Batch File to run hence me using Flashify - ive put the question on both of those threads aswell - where is the BAT command to run?
Thanks for your help

Use autorec m8. First root, second download autorec and click flash. Done
Sent from my LG-D802 using XDA Premium 4 mobile app

i turn on my LG Li-ion and it just keeps saying boot certification verify

Dead nexus? I can reach bootloader but any flash attempt ends up failing

I did root my device with Kingo root. It worked. Then I tried to unroot it with Nexus Root Toolkit v2.0.5. I couldn't apparently and the Goggle update that tried to install yielded an error.
At the end I tried the Flash Stock + Unroot option installing the last Lollipop version. It apparently worked but Android kept loading forever. I could still reach the bootloader.
I tried the same but with a early Lillipop version. The same happened.
And if I try to go to the bootloader -> then recovery -> then the android icon -> then volume up and power button -> then I do see the red led.
So, what can I do? Have I lost my nexus4?

Stay in the bootloader and use fastboot to flash the latest image from Google's site.
Sent from my Nexus 4 using XDA Free mobile app

CalculatedRisk said:
Stay in the bootloader and use fastboot to flash the latest image from Google's site.
Sent from my Nexus 4 using XDA Free mobile app
Click to expand...
Click to collapse
I have followed the instructions of here forum.xda-developers.com /nexus-4/general/how-to-how-to-flash-factory-image-t2010312, which I'd say does exactly the same as the toolkit.
And the result is the same, the X boot gets ethernal. If I try to do what's said there:
"Note that some users indicate that they can't get past the X on boot. If this happens to you, reboot into the bootloader and select recovery. Then, when you see the Android with the red exclamation mark, hold power and press volume up to take you to the menu. Wipe cache. If that still doesn't work, boot back into recovery and do a factory reset (this will obviously delete all your data & files in /sdcard...). "
Then it's the same, I cannot go to that menu, instead I see the red light if it's plugged, nothing if it's unplugged (only a black screen). So I'm stuck (!), I'm still under shock that I've brick my nexus 4 not doing anything really strange.

surprisingly, after having tried to enter to the recovery menu like 8 times (not being plugged), the SO has unstucked and has said "optimizing apps", after which it has been able to start normally.
Curious ^_^

So all is working? Glad you managed to fix it.