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[Q] Help, my device won't boot!

So basically I rooted my LG p500h and installed a ROM through ROM manager, the thing is that when I rebooted the device I got stuck at the analog to the Android logo that shows up after the LG logo. I flashed an stock ROM through KDZ update software but after the program did it's thing, I did hard reset the phone and got the same problem: won't boot up and forever stuck at the android logo. I can get to emergency mode tho and when usb connected will show the battery charging up. I have searched solutions and I haven't reached one yet so everyone told me to post here and ask for some help! I hope it's not the end of my device Any help is sincerly appreciated!

Secretagogo said:
So basically I rooted my LG p500h and installed a ROM through ROM manager, the thing is that when I rebooted the device I got stuck at the analog to the Android logo that shows up after the LG logo. I flashed an stock ROM through KDZ update software but after the program did it's thing, I did hard reset the phone and got the same problem: won't boot up and forever stuck at the android logo. I can get to emergency mode tho and when usb connected will show the battery charging up. I have searched solutions and I haven't reached one yet so everyone told me to post here and ask for some help! I hope it's not the end of my device Any help is sincerly appreciated!
Click to expand...
Click to collapse
Much as I hate to say it, ROM Manager is not friendly to our devices. Secondly, stay away from KDZ too. But don't panic. You do have options. You will need to use either ADB and dd commands, or fastboot and fastboot mode. Since you can't boot, most likely the ADB way won't work ATM. Both methods require either the ADB binaries or the Android SDK. An alternate method would be Android Flash Recovery. There is a link in my signature. There are complete instructions in the download. On thing, put the device in fastboot mode before connecting it to the PC.

Enter into emergency mode, BACK+VOL UP+POWER
then follow this guide to flash recovery: http://forum.xda-developers.com/showpost.php?p=15217609&postcount=3
After that enter into recovery, HOME+VOL DOWN+POWER
then wipe data/factory reset, wipe dalvik cache, wipe cache, format system then flash a rom of your choice like oxygen, cm9 present in development section.
Then reboot

shinobisoft said:
Much as I hate to say it, ROM Manager is not friendly to our devices. Secondly, stay away from KDZ too. But don't panic. You do have options. You will need to use either ADB and dd commands, or fastboot and fastboot mode. Since you can't boot, most likely the ADB way won't work ATM. Both methods require either the ADB binaries or the Android SDK. An alternate method would be Android Flash Recovery. There is a link in my signature. There are complete instructions in the download. On thing, put the device in fastboot mode before connecting it to the PC.
Click to expand...
Click to collapse
Odd enough, I plugged in the device to the computer after the USB drivers got installed (following all the instructions given by the files provided), I went to the bathroom and left the cell phone unattended, just to find it boot up! weird. Anyways your advice was very helpful and very clear! Now I will figure out how to get my old ROM for my country. Thanks again!

[Q] Stuck in bootloop, recover files

Hello.
Today my oneplus one was suddenly stuck in bootloop. This happened in the middle of the day when I rebooted my phone. My phone was running the latest update that came OTA (stock lollipop). Whenever I boot my phone it starts loading and suddenly a Chrome (browser) window appears for 1 second and tries to load a website. Afterwards my lock screen pop ups for 1 seconds and it starts to reboot. During the lockscreen I tried to unlock my phone as soon as possible, but it just reboots. (Any ideas about this weird problem?)
I CAN boot it in recovery mode by holding volume-down button and power button.
I CAN boot it in fastboot mode by holding volume-up button and power button.
Perhaps a factory reset will do the trick, but I don't have a backup of my files (because this happened so suddenly without me trying to flash/customize my phone). My first priority is recovering my files, because most solutions will end up in me losing every file. Unfortunately I've found little possibility to do this during the bootloop problem. I've tried to flash TWRP because it could make backups of my phone. I tried it through ADB/Fastboot, but it failed because my device is not unlocked (I can't go to settings and put my phone in developer mode and debugging mode). So I've read somewhere that unlocking my phone (bootloader?) through ADB will wipe my phone, which is exactly what I don't want.
Also I've tried this: http://forum.xda-developers.com/oneplus-one/help/fix-brickloop-audio-fx-fc-efs-corrupt-t2879061
But It also failed because my device was not unlocked.
Did I miss some steps somewhere or did I read something wrong?
Hopefully anybody has an idea to either fix the bootloop without losing my data, or finding a way to recover my files before wiping the phone.
Thank you.

RightHanded said:
Hello.
Today my oneplus one was suddenly stuck in bootloop. This happened in the middle of the day when I rebooted my phone. My phone was running the latest update that came OTA (stock lollipop). Whenever I boot my phone it starts loading and suddenly a Chrome (browser) window appears for 1 second and tries to load a website. Afterwards my lock screen pop ups for 1 seconds and it starts to reboot. During the lockscreen I tried to unlock my phone as soon as possible, but it just reboots. (Any ideas about this weird problem?)
I CAN boot it in recovery mode by holding volume-down button and power button.
I CAN boot it in fastboot mode by holding volume-up button and power button.
Perhaps a factory reset will do the trick, but I don't have a backup of my files (because this happened so suddenly without me trying to flash/customize my phone). My first priority is recovering my files, because most solutions will end up in me losing every file. Unfortunately I've found little possibility to do this during the bootloop problem. I've tried to flash TWRP because it could make backups of my phone. I tried it through ADB/Fastboot, but it failed because my device is not unlocked (I can't go to settings and put my phone in developer mode and debugging mode). So I've read somewhere that unlocking my phone (bootloader?) through ADB will wipe my phone, which is exactly what I don't want.
Also I've tried this: http://forum.xda-developers.com/oneplus-one/help/fix-brickloop-audio-fx-fc-efs-corrupt-t2879061
But It also failed because my device was not unlocked.
Did I miss some steps somewhere or did I read something wrong?
Hopefully anybody has an idea to either fix the bootloop without losing my data, or finding a way to recover my files before wiping the phone.
Thank you.
Click to expand...
Click to collapse
Unfortunately you might be stuck in a catch-22 situation here. In order to access the files you'd need to unlock the bootloader, but in doing so you'd lose those files. Without usb debugging already enabled I can't see a way out of this.

Decided to unlock the bootloader through ADB. (bye bye data)
After I've unlocked it, I've tried installing TWRP.
Some minor problems occured but I can finally boot into TWRP through volume-down button + power button.
I've decided to download the stock ROM i've found on the OPO forums.
Couldn't acces my phone through normal methods, so I had to use ADB to push the files into my phone.
Installing the file through TWRP, wiped cache/dalvik and installed super user before rebooting.
After rebooting my phone is stuck on the boot screen now. (This also happened before I installed TWRP on my phone)
I've also tried this method: http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541
Also no succes. I'm stuck in the bootscreen where it says 'cyanogen'.
EDIT: Managed to fix it eventually through: http://forum.xda-developers.com/oneplus-one/help/fix-brickloop-audio-fx-fc-efs-corrupt-t2879061 (part 2) writing the command in TWRP.
Phone finally boots normally again.

RightHanded said:
Decided to unlock the bootloader through ADB. (bye bye data)
After I've unlocked it, I've tried installing TWRP.
Some minor problems occured but I can finally boot into TWRP through volume-down button + power button.
I've decided to download the stock ROM i've found on the OPO forums.
Couldn't acces my phone through normal methods, so I had to use ADB to push the files into my phone.
Installing the file through TWRP, wiped cache/dalvik and installed super user before rebooting.
After rebooting my phone is stuck on the boot screen now. (This also happened before I installed TWRP on my phone)
I've also tried this method: http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541
Also no succes. I'm stuck in the bootscreen where it says 'cyanogen'.
Any other way to fix this problem?
Click to expand...
Click to collapse
Exactly what did you flash? Full filename please. No errors occurred?

Heisenberg said:
Exactly what did you flash? Full filename please. No errors occurred?
Click to expand...
Click to collapse
Hopefully the stock cyanogen OS.
First I've tried to flash cyanogenmod 12 through TWRP (file is found here: https://forums.oneplus.net/threads/cm12s-yng1tas17l-installation-guide-review-change-log.304615/)
Afterwards I was still stuck in bootscreen, so I've looked for another solution.
Which made me find this guide: http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541
After flashing this file (probably the same thing) the problem still remained.
Eventually after multiple wipes/factory resets (which did not solve the problem) I've entered the command in TWRP and after reboot it finally worked again.
So I basically flashed my phone twice, once through TWRPS and the other through the batch file (perhaps ADB?).
Also no errors occured which stopped the flashing and commands. Did have to reinstall TWRP and reboot instantly in it by holding the volume down button multiple times. This doesnt happen anymore though.
Only had to install google apps for CM12 (gapps), for which I used TWRP in recovery mode.
Currently reinstalling most apps on my phone and no problems yet.

After rooting my nexus 5 is not booting up with non stop booting animation

I have a nexus 5 16 GB and i downloaded the recent software update android 6.0.1 and then I decided to root and I used 'Nexus root toolkit v2.06' and first unlocked the bootloader and then rooted. Everything worked fine but after the process was complete it was rebooting and the booting animation went on and on for many hours and the device did not root. I really don't know what's going on. My purpose is to install a custom rom: cyanogenmod 12. Now what should I do ???? PLEASE HELP. When i try to enter recovery mode it shows a picture of the android mascot with opened back and exclamation and cannot enter command as well. and after some time the booting animation begins and goes on and on...
please help...

nexus_5_ said:
I have a nexus 5 16 GB and i downloaded the recent software update android 6.0.1 and then I decided to root and I used 'Nexus root toolkit v2.06' and first unlocked the bootloader and then rooted. Everything worked fine but after the process was complete it was rebooting and the booting animation went on and on for many hours and the device did not root. I really don't know what's going on. My purpose is to install a custom rom: cyanogenmod 12. Now what should I do ???? PLEASE HELP. When i try to enter recovery mode it shows a picture of the android mascot with opened back and exclamation and cannot enter command as well. and after some time the booting animation begins and goes on and on...
please help...
Click to expand...
Click to collapse
Unless something has changed, version 6. requires that you flash a special kernel before you can root your phone otherwise you are as you are now, stuck in a boot loop. You should probably download the factory image from Google, and then flash the system image to get rid of what you have done.. Perhaps then your phone will start normally

funnel71 said:
Unless something has changed, version 6. requires that you flash a special kernel before you can root your phone otherwise you are as you are now, stuck in a boot loop. You should probably download the factory image from Google, and then flash the system image to get rid of what you have done.. Perhaps then your phone will start normally
Click to expand...
Click to collapse
Thank you very much for the reply, I really do have no idea as to how to flash the factory image because i am very new in this area. Could you please recommend software and which factory image i should download, please ?? thanks very much.
:good:

funnel71 said:
Unless something has changed, version 6. requires that you flash a special kernel before you can root your phone otherwise you are as you are now, stuck in a boot loop. You should probably download the factory image from Google, and then flash the system image to get rid of what you have done.. Perhaps then your phone will start normally
Click to expand...
Click to collapse
Also, you mentioned a 'special kernel' what does that mean. All i want to do to my device is install cyanogenmod 12 and for that i believe it needs to be rooted, so i am really confused. What should I do know

I'm having this same problem, and unfortunately, when I start the phone on fastboot, I can not access the recovery mode in order to upload a factory image of nexus 5.
I used the new tool available her for quick flash, and now, I don't have a phone.

First, don't panic. Your phone is still very easy to recover. Unfortunately I can't get you a complete walkthrough here (for now at least), so I'll give you the main idea and you'll have to do your homework (as maybe you should have done before).
1. You need to get fastboot working on your computer. It's included in the Android sdk package, but there might be some easier way to get it. Google it. You might need drivers for your pc too. Google it as well.
2. Then you need to get into fastboot mode on your phone. To do it, hold down power button AND volume down button until it gets into fastboot mode. You will see an android on his back with the cover open. At this point, connect your phone to your pc, open a terminal on your pc and type "fastboot devices" without the quotes "". It should find your phone if fastboot is working. If it doesn't work go back to step 1.
3. Download TWRP recovery on your pc and place the img file in the same folder as your fastboot executable (not mandatory but easier). It can be found here https://dl.twrp.me/hammerhead/
4. Always in fastboot mode, type "fastboot flash recovery twrp-2.8.7.1-hammerhead.img" assuming you downloaded that file, which you should have by the way. It should install fine. If you haven't placed the file in the same directory as your fastboot executable, you will need to provide the path to your img file as well.
5. Then use the volume rocker to switch between modes and choose reboot recovery.
6. You should now be in TWRP recovery. At this point, download a custom kernel (anyone found on xda for hammerhead should do) and push it to your phone. It should be fairly simple with TWRP. Then flash your new kernel using install. It should help you get your phone booting normally. Alternatively, you can download a custom ROM like cm12.1 and flash it altogether. It will install everything needed for your phone to boot up too. Beware if flashing a ROM though, I strongly advice you to do a factory reset before flashing it. You will find that option in the wipe menu.
Hope it helps, let me know if you need further assistance.

Yesterday, I have tried everything to have my computer to recognize the "fastboot" command, and I installed like 2 or 3 different programs for that. With my old Windows 7, I have been able to push a flashed image to fix this issue, using the fastboot command, but with Windows 10, it's always telling me it's not a valid command. I'll keep trying it, otherwise, i'll have to "resurrect" my old Windows XP computer.
Also, I noticed now that, while trying to install the fastboot, as per some files that I could download, but no file has been copied into my computer, not even if I run it as admin.

fixed. but no RECOVERY mode options....
Hi Guys,
Thank you very much for the help, I have finally recovered the phone and running android 6.0 MRA58N but it is not rooted. Now if you don't mind could you teach me how to root because i have checked lots of videos and tuts but none worked for me...
IMPORTANT:
when i am in recovery mode why cannot I access options even when i press volume up + power button and release them at the same time...????
Thanks in advance.

Just flash a custom recovery via fastboot. Just make sure your bootloader is unlocked. Can't link though.

hi guys i have used nexus 5 mobile with cyanogenmod 14.1 .It worked properly in 1 year. after that suddenly switched off and it not properly boot up .i try to switch on my mobile , first it show google with unlock logo properly and when it show cyanogenmod logo it stuck and again show google with unlock logo....i try recovery mode to wipe and flash the same rom ....the process is interrupt at middle stage and again show the google..i try lots of time . after few try that process finished completely without interrupt. then use my mobile 1 day same as i used first time root. after that same problem occur on my mobile ..so help me guys

@[email protected], possible power button problem?

Need help with zte grand x z777 cricket version.

I let a friend try to root it and he screwed me. The phone won't boot into the os, fastboot, or recovery. in fact it constantly tries to install some new recovery but gets to 25% and repeats. I can get into download mode, I assume it's download mode. that's the only way my pc will recognize the phone. I've tried everything, can't even find the stock rom and recovery for this thing. ADB doesn't see the device nor does fastboot. Am I out of luck or is there some type of fix for this?

Factory reset, now stuck at TWRP, can't access fastboot and rescue

Ive been running KangVIP with no problems, however I got some adware which refused to go away, so I attempted to factory reset via the phones menu. It then ended up stuck at the TWRP screen. This has happened before so next I tried to restore a previous backup...not successful. I can't access fastboot and rescue to flash the official recovery.
Anyone got any help? Is there a guide to flashing the stock rom or have I borked my phone?

You can not shut down the device and connect it via USB to a PC and boot while holding volume down button into fastboot mode?
Well then you have ruined your phone.

I'm OP, was unable to get into my usual account last night. I'm not sure how, but holding volume up, down and power seemed to kick start it back to life and I'm back running KangVIP. I don't think I'll be resetting it again for a very long time.

Hirs_E_Fruit said:
You can not shut down the device and connect it via USB to a PC and boot while holding volume down button into fastboot mode?
Well then you have ruined your phone.
Click to expand...
Click to collapse
Hi I'm in the a similar boat with my Huawei P8 Max DAV-703L (brought in China but live/use in the US) its only boot looping into TWRPv2.8.7.0. I can put it into Fastboot & Rescue Unlocked Bootloader but don't know what to do since i tried flashing my Android 6 again and no repsponse just TWRP boot loop. Now some how i wiped my ext-sd card as well (really pissed with myself about) Can you help pls on how to get my Huawei P8 Max DAV-703L stock rom back working again?

It happend to me - this is what I did to fix it.
ohiromep8max said:
Ive been running KangVIP with no problems, however I got some adware which refused to go away, so I attempted to factory reset via the phones menu. It then ended up stuck at the TWRP screen. This has happened before so next I tried to restore a previous backup...not successful. I can't access fastboot and rescue to flash the official recovery.
Anyone got any help? Is there a guide to flashing the stock rom or have I borked my phone?
Click to expand...
Click to collapse
I'm not sure whether it was luck or not, but all I did was to go into TWRP and then chose the Mount option, unmounted everything, then went to Reboot and chose Bootloader - that got me back to fastboot where I was able to flash the stock recovery, do a factory reset and get my phone back.

i have similar problem one friend use kingroot change to tpwr. now i try restore frimware but fastboot on screen say unloked on red text but commands not alowed.
and android os not have R/W /system only can r/W on tpwr i try use file explorer remove king root but no boot
who to clean rom? for update.

needrom.com