I followed this tutorial: http://forum.xda-developers.com/g4/general/unlock-bootloader-install-twrp-root-t3128241
Here's what I did:
Unlocked bootloader
Booted into TWRP (version 3.0) (didn't install, just booted into)
Flashed SuperSU
Rebooted into system
Now whenever I boot the device I'm stuck in a boot loop.
So I can't boot the device up or get into fastboot mode (what should fastboot mode look like? I got into download mode at some point), not sure what to do?
I had same problem once, managed to handle it with LGUP and refubrish full stock rom
ashensii said:
I had same problem once, managed to handle it with LGUP and refubrish full stock rom
Click to expand...
Click to collapse
I tried LGUP but it says the Model is "unknown" so when I select my phone it says "You have to select a known model, please." Can someone help?
I also tried flashing a stock kdz using LG flash tool but I got an error. Does anyone know what I can do? I can get my phone into download mode but don't know what to do on my computer.
I'll give someone $20 if they can help fix my phone for me
Paul397 said:
I also tried flashing a stock kdz using LG flash tool but I got an error. Does anyone know what I can do? I can get my phone into download mode but don't know what to do on my computer.
I'll give someone $20 if they can help fix my phone for me
Click to expand...
Click to collapse
With LG up if it comes up with device unknow with usb cable still pluged in pull battery out then put it back.
Paul397 said:
I also tried flashing a stock kdz using LG flash tool but I got an error. Does anyone know what I can do? I can get my phone into download mode but don't know what to do on my computer.
I'll give someone $20 if they can help fix my phone for me
Click to expand...
Click to collapse
I had the same problem.
If you can get your phone in the download mode, than try this.
1: Install LGBridge,
2: Boot your phone in download mode & start LGBridge,
3: Than on Software Update tab, on the bottom right corner, you will see an option saying "Update Error Recovery"
4: Click on it and your phone will be flashed to latest firmware. Make sure you are connected to net as it will need to download it.
Once the update it complete, Your phone should reboot normally.
Give it a try and let me know how it goes.
Related
my LG G PAD v500 is stuck at :
Fastboot mode started
udc_start()
the only thing hat i can do is to be turned off....help!!!!!!!!!!!!!!
:crying:
im unable to go to download mode...... can you please instruct me in detailed in what to do?
Hey i have the same problem
I have the same problem after i did a factory software upgrade and i was rooted but no recovery. did yo ever get it fixed
Solematrix said:
I have the same problem after i did a factory software upgrade and i was rooted but no recovery. did yo ever get it fixed
Click to expand...
Click to collapse
If this error shows up because of bad recovery, boot into normal ROM, root and flash stock recovery or twrp
If this error shows up because of bad boot.IMG, then you'll have to restore firmware from kdz file via download mode.(download mode = plug in usb plus volume up(?)... You should see a "Download" logo, brightness mat be very low and you have to squint )
Thanks
Yes thanx i figured it out from reading threw the forums but your help was much appreciated now to find out why my vk810 will not upgrade to 4.4.2 keep getting a error message
paperWastage said:
If this error shows up because of bad recovery, boot into normal ROM, root and flash stock recovery or twrp
If this error shows up because of bad boot.IMG, then you'll have to restore firmware from kdz file via download mode.(download mode = plug in usb plus volume up(?)... You should see a "Download" logo, brightness mat be very low and you have to squint )
Click to expand...
Click to collapse
Solematrix said:
Yes thanx i figured it out from reading threw the forums but your help was much appreciated now to find out why my vk810 will not upgrade to 4.4.2 keep getting a error message
Click to expand...
Click to collapse
I went to the Verizon store just now, their vk810 were still on 4.4.2, "check for update" says no update
Try updating via WiFi. If you removed any system apps, you need to put them back
Also, at least post the error :/... How can I help you debug if you don't tell me which step had the problem (can't search for update, update failed with x error code, tablet blew up to pieces during update...)
i did post it in another thread i started but never really got answers
paperWastage said:
I went to the Verizon store just now, their vk810 were still on 4.4.2, "check for update" says no update
Try updating via WiFi. If you removed any system apps, you need to put them back
Also, at least post the error :/... How can I help you debug if you don't tell me which step had the problem (can't search for update, update failed with x error code, tablet blew up to pieces during update...)
Click to expand...
Click to collapse
---------- Post added at 10:40 PM ---------- Previous post was at 10:37 PM ----------
i wiped it clean and started from new and it still say the same thing i tried it on wifi same time. i even took out my t mobile sim thinking it was that
paperWastage said:
I went to the Verizon store just now, their vk810 were still on 4.4.2, "check for update" says no update
Try updating via WiFi. If you removed any system apps, you need to put them back
Also, at least post the error :/... How can I help you debug if you don't tell me which step had the problem (can't search for update, update failed with x error code, tablet blew up to pieces during update...)
Click to expand...
Click to collapse
Hi,
Just to know if this problem is solved...
If it is, then this is most probably useless... unless somebody else stumps into the same problem.
If I can guess it correctly, this message typically display when you have rooted your V500, installed a custom recovery from an app flasher (i.e. Flashify, ROMToolBox...) and the recovery isn't compatible with your device and you tried a hard reset.
This means that you are able to boot into fastboot and that is what's going to save you
Why ? Simply put : because you can flash some files using the fastboot command line
Try to flash bootloaders, aboot, boot and recovery just for a try. You can find those I guess.
Regards.
Stuck with "Fastboot mode started"
I was currently on Altev vk81035b-rooted-SU installed but no custom recovery. I followed Altev-Hnk1 instructions for flashing aboot.4.2.2 & commands (dd if=/......Etc) you know the rest) which successfully copied the file. Then when I typed "reboot recovery" BAM, that's when my gPad slapped me in the face with the following--> Fastboot mode started udc_start()
I press & constantly hold "power & down" buttons which always brings me to "System Recovery" screen listing 4 options, "Continue reboot"-"Factory data reset"-"Wipe Cache"-"Safe mode boot". Anytime I have a problem I'll choose "safemode" which always got me back in after any "Boot Verification Errors", but now it doesn't & I'm stuck no matter what I chose. I'm starting to think I may need to connect my laptop and flash the KDZ starting from scratch with plain-Jane Verizon stock!?!? Whatcha think, yes-no-maybe so!?!? LOL
So,in my stupidity to install an ota update after rooting my phone,I managed to get it stuck in a bootloop. Now I followed some guides on the internet,downloaded the pre-rooted images,but fastboot doesnt want to flash system.img. I tried to download the img from different sources,none worked. The error just says cannot load system.img.I installed fastboot with the 15 second installer,I havent done any other modifications besides rooting and I cant even access recovery mode,it just shows me error in red text.Is there anything I can do myself or do I need to send my phone in service? Thanks! btw the model is ZE551ML
thehappyface said:
So,in my stupidity to install an ota update after rooting my phone,I managed to get it stuck in a bootloop. Now I followed some guides on the internet,downloaded the pre-rooted images,but fastboot doesnt want to flash system.img. I tried to download the img from different sources,none worked. The error just says cannot load system.img.I installed fastboot with the 15 second installer,I havent done any other modifications besides rooting and I cant even access recovery mode,it just shows me error in red text.Is there anything I can do myself or do I need to send my phone in service? Thanks! btw the model is ZE551ML
Click to expand...
Click to collapse
Hello guys what is the error in red text please??
You can go to your recovery or not?
Thank
quadeur06 said:
Hello guys what is the error in red text please??
You can go to your recovery or not?
Thank
Click to expand...
Click to collapse
It just shows me a dead android with the words Error! written in red text
thehappyface said:
It just shows me a dead android with the words Error! written in red text
Click to expand...
Click to collapse
For pass this error ..It's just a security ..Tap in the volume + and in the same time to the power button very fast And it's work !!
thehappyface said:
So,in my stupidity to install an ota update after rooting my phone,I managed to get it stuck in a bootloop. Now I followed some guides on the internet,downloaded the pre-rooted images,but fastboot doesnt want to flash system.img. I tried to download the img from different sources,none worked. The error just says cannot load system.img.I installed fastboot with the 15 second installer,I havent done any other modifications besides rooting and I cant even access recovery mode,it just shows me error in red text.Is there anything I can do myself or do I need to send my phone in service? Thanks! btw the model is ZE551ML
Click to expand...
Click to collapse
Hello there,
Few days ago, I had the same problem. But luckly I found a way to fix it. I was so desperate.
1) Download "CWM Zenfone_2_Intel"
https://www.mediafire.com/folder/w70...5840/Zenfone_2
Then unzip
2) Go in fastboot mode in your Zenfone 2, and connect it to your PC
3) In the downloaded folder, run "cai_dat_CWM.bat"
4) Type ACCEPT
Then Enter
5) Then if the script is blue, that's perfect. Type T4, Enter, and normally your Zenfone will reboot in CWM Recovery Mode.
6) If that worked, download the ROM stock on the Asus Website, copy it on the SD Card, then flash it from the CWM Recovery Mode.
This method fix my bootloop, but a brick I don't know...
If it didn't work, try to install "15 seconds adb installer"
I want to ask that it hasn't any solutions yet??
I have flash Genisys Rom 2.6.zip than reboot that have a bootloop problem....
Will it be a solutions then?
Any idea??
Have you flashed v20a bootloader and modem images?
mirko93s said:
Have you flashed v20a bootloader and modem images?
Click to expand...
Click to collapse
Yes I flash it back those v20a bootloader, boot and modem after I got into the twrp, then I reboot it, it is stuck on the LG logo screen now...
and now I can't go back to the fastboot mode and the twrp...that 's the problem...
any idea to go back the twrp?
i'm stuck on same thing.
What I've tried.
! flashing back to stock rom using lg flash tool. Crashes at 9%. Tried flashing 20A file not allowed
both adb and fastboot methods don't work as adb doesn't detect phone and fastboot get's stuck on waiting on device
Basically the phone is stuck on boot logo after upgrading to marshmallow which all went fine and phone booted as normal after I then reinstalled the twrp recovery as before so to install supersu after boot that when the problem started. The phone can get into factory reset the two yes methods which I have tried still no luck and I can also get into download mode. basically am I waiting on a update to lg flash tool or have I ducked my phone any help would be appreciated
You probably ****ed the security flag added into marshmallow and it didn't like it one bit,that's why its better the flash newer versions of a rom when you have a recovery then an official ota ,that's where they get ya locked down .is there any devices in the device manager at all? Just checking if its hard bricked.if its labeled as q9xxxx something like that then its definitely hard bricked.like not even a jtag can get er back
imsopickled said:
i'm stuck on same thing.
What I've tried.
! flashing back to stock rom using lg flash tool. Crashes at 9%. Tried flashing 20A file not allowed
both adb and fastboot methods don't work as adb doesn't detect phone and fastboot get's stuck on waiting on device
Basically the phone is stuck on boot logo after upgrading to marshmallow which all went fine and phone booted as normal after I then reinstalled the twrp recovery as before so to install supersu after boot that when the problem started. The phone can get into factory reset the two yes methods which I have tried still no luck and I can also get into download mode. basically am I waiting on a update to lg flash tool or have I ducked my phone any help would be appreciated
Click to expand...
Click to collapse
Yes brother!!! The same thing as you experience.... just like the thread (LG G4 bootloop.... Need expert help... Ready to pay the price)
but there are still nothing method? So just wait for the update to lg flash tool and the fully TOT files??
O MY GOD...I've been fooled trick this time...
mr turtle droid said:
You probably ****ed the security flag added into marshmallow and it didn't like it one bit,that's why its better the flash newer versions of a rom when you have a recovery then an official ota ,that's where they get ya locked down .is there any devices in the device manager at all? Just checking if its hard bricked.if its labeled as q9xxxx something like that then its definitely hard bricked.like not even a jtag can get er back
Click to expand...
Click to collapse
No its listed as two different devices as LGE andriodnet serial port com4 and also LGE andriodnet usb modem. I have noticed that if i uninstall these two from within device manager that it then goes back to an lgmobile phone with a i on the phone icon in device manager. I have tried to find the proper driver so to make the computer see the lg phone again without error via extracting driver install exe but no joy it goes back to the above.
I wonder Is it possible to flash the .img files that are boot. system etc using lg flash tool the one with the tot methid via a script and the files I wonder. Or even convert the files needed to do a complete flash of system bootloader etc to bin files so to be read by the lg flash tool used in the tot version. or is there any other software that can convert kdz to bin.
imsopickled said:
No its listed as two different devices as LGE andriodnet serial port com4 and also LGE andriodnet usb modem. I have noticed that if i uninstall these two from within device manager that it then goes back to an lgmobile phone with a i on the phone icon in device manager. I have tried to find the proper driver so to make the computer see the lg phone again without error via extracting driver install exe but no joy it goes back to the above.
I wonder Is it possible to flash the .img files that are boot. system etc using lg flash tool the one with the tot methid via a script and the files I wonder. Or even convert the files needed to do a complete flash of system bootloader etc to bin files so to be read by the lg flash tool used in the tot version. or is there any other software that can convert kdz to bin.
Click to expand...
Click to collapse
I think this is impossible to flash the .img files that are boot. Because we cannot to go into the fastboot mode.
bardochu said:
I think this is impossible to flash the .img files that are boot. Because we cannot to go into the fastboot mode.
Click to expand...
Click to collapse
not even through adb shell????????
---------- Post added at 02:03 PM ---------- Previous post was at 02:02 PM ----------
and what you guys are experienceing is the rollback protection from lg in their boot-loaders...not sure how to get past it but i saw a thread on here to get past it
I too, like many others, am stuck in a boot loop, able to access download mode, but not recovery, i have an unlocked bootloader, but cannot get into fastboot or use adb commands.
robg2102 said:
I too, like many others, am stuck in a boot loop, able to access download mode, but not recovery, i have an unlocked bootloader, but cannot get into fastboot or use adb commands.
Click to expand...
Click to collapse
:highfive:In the same boat, XDA's brother TheBledard Who has a same trouble in the bootloop. He said that you can use the octopus box to unbrick.
But it seem a little bit expensive....:cyclops:
Same
I had the same problem. They recently reposted the download to a fixed 2.6 so try to redownload from the genesys post. Also, flash the marshmallow kernel and supersu right after, then followed by genesys theme if you choose to use.
Retry and retry to start twrp at boot with sleep button and volume down button.... I had the same problem with marshmallow because i forgot to flash v20a bootloader, and i had finally access to twrp after a lot of times...
bardochu said:
:highfive:In the same boat, XDA's brother TheBledard Who has a same trouble in the bootloop. He said that you can use the octopus box to unbrick.
But it seem a little bit expensive....:cyclops:
Click to expand...
Click to collapse
almost 200 dollar yes
Hi,
My H815 always suffered from this problem: http://forum.xda-developers.com/g4/help/fastboot-download-mode-problem-t3466649 - the only way I could have fastboot was from an adb shell.
Well, that was not a problem until today: CM14's nightly broke (booting just loops at the moving logo) and now I have no way to go back to fastboot. And if I try the recovery mode, I just have a blurry circle saying "erasing" for a few seconds, then a looping CM logo.
Anyone has a way out of this mess ?
bestouff said:
Hi,
My H815 always suffered from this problem: http://forum.xda-developers.com/g4/help/fastboot-download-mode-problem-t3466649 - the only way I could have fastboot was from an adb shell.
Well, that was not a problem until today: CM14's nightly broke (booting just loops at the moving logo) and now I have no way to go back to fastboot. And if I try the recovery mode, I just have a blurry circle saying "erasing" for a few seconds, then a looping CM logo.
Anyone has a way out of this mess ?
Click to expand...
Click to collapse
When you say you try the recovery mode how do you try to get into it? Btw do you have twrp installed?
Same thing happened to me, tried to install, just got put straight back in to TWRP after boot. Tried installing a stock ROM, CM ROM & using LG Bridge to recover, to no avail. Help appreciated, (i'm assuming LGUP is going to come up a lot)
Tycoon282 said:
Same thing happened to me, tried to install, just got put straight back in to TWRP after boot. Tried installing a stock ROM, CM ROM & using LG Bridge to recover, to no avail. Help appreciated, (i'm assuming LGUP is going to come up a lot)
Click to expand...
Click to collapse
The OP has another issue pls do not hijack.
steadfasterX said:
The OP has another issue pls do not hijack.
Click to expand...
Click to collapse
Sorry, it's nearly the same issue though, CM14.1 broke phones today.
Today's update broke mine as well. Looking for solutions. Will follow your thread and progress.
Same for me. Tried download mode with lgup to flash stock which worked once - but I kind of bricked it again by trying to install cm14.1 again. Then i tried to go back to stock using lgup again, but now lgup it just crashes. The phone now goes automatically to download mode after turning it on, the progress bar stays at 0%, the phone says "633A B100" and lgup crashes after 9% "prepare dlmode" or something similar. any ideas? :/
Some people seem to have fixed this issue by flashing the official Cyanogenmod Recovery.
thewild said:
Some people seem to have fixed this issue by flashing the official Cyanogenmod Recovery.
Click to expand...
Click to collapse
After flashig the CM Recovery via TWRP, i can't use the recovery anymore. If i boot into CM-Recovery the display shows "Ereasing" and start the system. After that i got a bootloop.
Is it possible to use fastboot??
You guys should also check CM14.1 thread because people there are talking about the same problem. The latest post says the only solution was to flash an official kdz with LGUP.
thewild said:
You guys should also check CM14.1 thread because people there are talking about the same problem. The latest post says the only solution was to flash an official kdz with LGUP.
Click to expand...
Click to collapse
Did that. Worked once. Then i tried to flash cm again and had the same problems, so i wanted to flash stock again... now lgup crashes at 9% and the phones goes directly to download mode after turning it on.
onlyolli said:
Did that. Worked once. Then i tried to flash cm again and had the same problems, so i wanted to flash stock again... now lgup crashes at 9% and the phones goes directly to download mode after turning it on.
Click to expand...
Click to collapse
And the two times you tried to flash CM, that was with the same recovery ?
Can you go into fastboot mode ?
thewild said:
And the two times you tried to flash CM, that was with the same recovery ?
Can you go into fastboot mode ?
Click to expand...
Click to collapse
Yes, it was with cm recovery 20161130, if i remember correctly.
Sadly now, i can not go into fastboot. The phone goes directly into download mode. My windows vm detects the phone, and tries to flash a recent kdz, but lgup crashes at 9%. The phone still shows "0%".
Oh that's bad. What about another kdz ?
thewild said:
Oh that's bad. What about another kdz ?
Click to expand...
Click to collapse
Already tried like 3-4.... Its always the same. If the tool would at least give me a little bit more information, but it just stops.
I don't know then. Some users seem to have had the same problem (stuck at 9%) : http://forum.xda-developers.com/search/forum/4233?query=lgup 9%
I had the same issue, tried several things, my final solution was:
- Start in download mode (Volumen up and then plug in cable)
- use "LG Brigde" on Mac to install stock Rom ( Software update tab in APP ) guess should also work with Windows
- Boot original android
- enable usb debug
- Start bootloader via ADB
- fastboot flash recovery to twrp 3.0.2
- Boot in recovery via power and vol down (first factory reset from stock appears but after this twrp is starting)
- install cm nighty of 1 DEC via ADB sideload
- reboot and done
In the meantime i updated to twrp 3.0.2-1., installed gapps etc. everything is now working fine again.
Hope this is also working for you.
Which version of cm14 did u download and install? Can u please post the exact version?
Mmh ... LGUP is the Windows utility right ? How do I do if I only have a Linux machine ?
steadfasterX said:
When you say you try the recovery mode how do you try to get into it? Btw do you have twrp installed?
Click to expand...
Click to collapse
I'm trying to get to it via power+down, I get to the double "do you want to factory reset ?" question, but then :
- sometimes the CM recovery just says "erasing" for a few seconds and reboots to (non-working) CM
- sometimes it just plainly boots to (non-working) CM
I used to have TWRP installed but it didn't work with CM update, so I let CM install its own recovery.
Hello,
i dropped my phone last night and at first boot phone clock changed and i could not connect wifi. i tried to connect wifi today but it did not worked. Thats why i opened hidden menu by using *#546368#*855# test my phone if there is a hardware problem or not. i clicked first option then second option my phone got reset but i got Secure booting error after that and it stuck. Then i opened twrp by using factory data reset option. i got backup of my data from twrp menu.
What should i do now?
Notes:
- i use twrp + android 6.0 rooted firmware
- i dont know if can can install apk since i cant open android system
- i dont want to install stock rom by a pc because i think i will lose all info on phone and ont be able to get them back without twrp.
juba08 said:
Hello,
i dropped my phone last night and at first boot phone clock changed and i could not connect wifi. i tried to connect wifi today but it did not worked. Thats why i opened hidden menu by using *#546368#*855# test my phone if there is a hardware problem or not. i clicked first option then second option my phone got reset but i got Secure booting error after that and it stuck. Then i opened twrp by using factory data reset option. i got backup of my data from twrp menu.
What should i do now?
Notes:
- i use twrp + android 6.0 rooted firmware
- i dont know if can can install apk since i cant open android system
- i dont want to install stock rom by a pc because i think i will lose all info on phone and ont be able to get them back without twrp.
Click to expand...
Click to collapse
Hello,
You need to install Mr.Bump (click on it to download it) and move it to your Phone (Go to TWRP,connect your phone with your PC,move the file to your phone)Then click install and select "Mr.Bump.zip" file.
Greetings.
thanks you but i bricked my phone last night now it does not even open or charge. Thats i have done so far:
i used auto rec on my lg g3 d855 phone. https://forum.xda-developers.com/lg-g3/development/stock-d855-30b-images-kdz-flashables-t3282012 i had stock lg 6.0 30b firmware provided in this topic. it said succsfull and after the reset phone did not open and it does not respod to any button also dont get charge there is just black screen. is there there any way yo fix this?
do you think something like this topic help this issue?
https://forum.xda-developers.com/verizon-lg-g3/general/how-to-hardbrick-guide-using-test-t3276928
juba08 said:
thanks you but i bricked my phone last night now it does not even open or charge. Thats i have done so far:
i used auto rec on my lg g3 d855 phone. https://forum.xda-developers.com/lg-g3/development/stock-d855-30b-images-kdz-flashables-t3282012 i had stock lg 6.0 30b firmware provided in this topic. it said succsfull and after the reset phone did not open and it does not respod to any button also dont get charge there is just black screen. is there there any way yo fix this?
do you think something like this topic help this issue?
https://forum.xda-developers.com/verizon-lg-g3/general/how-to-hardbrick-guide-using-test-t3276928
Click to expand...
Click to collapse
It would be better not to flash those kdz files.
You could have asked here before proceeding,but it doesn't matter now.
For the topic that you sent,I'm not sure that it will work.
So,can enter in Download mode (Click on it to see how to enter)
If you can,please reply.
Sotiris02 said:
It would be better not to flash those kdz files.
You could have asked here before proceeding,but it doesn't matter now.
For the topic that you sent,I'm not sure that it will work.
So,can enter in Download mode (Click on it to see how to enter)
If you can,please reply.
Click to expand...
Click to collapse
i have done everything on that topic i went ok until last steps but at last i still got black screen and cant enter download mode or boot. but pc recognizes the phone as lge androidnet usb now in device manager. it was Qualcomm 9008 at start.
juba08 said:
i have done everything on that topic i went ok until last steps but at last i still got black screen and cant enter download mode or boot. but pc recognizes the phone as lge androidnet usb now in device manager. it was Qualcomm 9008 at start.
Click to expand...
Click to collapse
Hmm Try this guide Unbrick guide (it's officially for D855)
thanks it worked in second time now i can enter download mode i am flashing with lg flash tool. the problem is i could not install twrp before. i tried 5 roms + autorec, twrp manager and twrp offical app. and all resulted failing to open clock work mode. now i will try with D85530B_00_1217_32G.kdz
i have twrp backup in my sd card that why i am trying to boot into twrp for more than 24 hours. i hope i can do this. i winn never use eutorec i will use offical twrp app next time.
i can open android but i cant open twrp i got error boot vefication failed. i can use phone like that but i want to get my backup. if i cant i will have to install apps one by one and i will also lose some files, contacts, data etc.