[Q] Bootloop, no recovery - how to shutdown the phone - G2 Q&A, Help & Troubleshooting

Hello,
I'm on LG G2 Stock Rom on Kit Kat (4.4.2). The phone is rooted but no custom recovery as I just need "root" to run Titanium backup.
Yesterday, I attempted to update the 1 XML file to increase speaker volume. Upon restart the phone will stuck on LG logo and does nothing.
I can access download mode. So now, i'm downloading LG Flash Tool and KDZ file for my phone to flash all back to stock.
The question is now: how do I turn off the phone? Pressing power button will simply restart the phone - it never goes to off.
Another question: if I don't install any custom recovery, is there any stock recovery installed? When I attempted to go to recovery (by pressing volume down + power method), I was presented with Factory reset questions. I clicked OK twice and then Android logo appears (it seems like it's attempting to really do a factory reset) and then phone reboots.
If I can go to stock recovery, I hope I can access the storage inside and redo what I did yesterday.
Anyone can help? Or share some knowledge?
Thanks

The latest software upgrade was installed by using LGMobile support tool. I'm back to stock and finish with ioRoot.
Now, going to use AutoRec to install recovery (better to have custom now, so if this happens again, I have a way to access my phone data).
No answers given but it's no longer urgent now. Still if anyone found a way to off the phone when boot looping other than waiting for battery to run dry, by all means, please reply the thread.
Thanks.

poundesville said:
The latest software upgrade was installed by using LGMobile support tool. I'm back to stock and finish with ioRoot.
Now, going to use AutoRec to install recovery (better to have custom now, so if this happens again, I have a way to access my phone data).
No answers given but it's no longer urgent now. Still if anyone found a way to off the phone when boot looping other than waiting for battery to run dry, by all means, please reply the thread.
Thanks.
Click to expand...
Click to collapse
Unplug the USB cable if it's plugged.
Hold power button for like 30 seconds straight.

To turn off phone ,just push volume down and power button same time for like 7-10 sec, it will be like restart , but keep them pressed until screen shuts off again (it will take less then 1 sec). Thats all

username4this said:
Unplug the USB cable if it's plugged.
Hold power button for like 30 seconds straight.
Click to expand...
Click to collapse
I didn't time 30 seconds, but I did press power button for a long time. Is this method for when you can use the phone? Mine is during boot loop.
jkjambo said:
To turn off phone ,just push volume down and power button same time for like 7-10 sec, it will be like restart , but keep them pressed until screen shuts off again (it will take less then 1 sec). Thats all
Click to expand...
Click to collapse
I can't say for sure now, since I have my phone backed-on. But I sort of press these buttons for a long time at the beginning (when I wasn't really sure how to go to recovery mode). But good to know about this - (for next time ).
thanks both!

Only method i know to completely shut down phone in any situation is what i already wrote in last post.

jkjambo said:
Only method i know to completely shut down phone in any situation is what i already wrote in last post.
Click to expand...
Click to collapse
Agreed.
it happen to me too when I try to install MIUI ROM.
Pull off USB cable and long press power the power button

Thanks. I'll remember this, if I got unlucky and stuck in booth loops.
For now, I installed recovery, so hopefully if this happens, I can still access my internal folder and do the require changes.

Related

[Q] ?Bricked? LG G2 (D800) *Seriously Bad*

So I tried getting Cyanogenmod 10.2 for my LG G2 (D800). I did some stuff and ended up rebooting and getting this screen.
[650] Fastboot mode started
[700] udc_start()
http://forum.xda-developers.com/attachment.php?attachmentid=2403056&stc=1&d=1384904247
I used TWRP for backup, but can't even get into phone to do anything.
Also it won't come up on my computer when I plug it in with usb. I tried both my computers and they both had the drivers but the phone won't even connect to either pc. I could connect easily the day before though.
http://forum.xda-developers.com/attachment.php?attachmentid=2403058&stc=1&d=1384904247
I also got this while pushing Power and both Volume buttons at same time.
http://forum.xda-developers.com/attachment.php?attachmentid=2403059&stc=1&d=1384904390
What should I do? :crying: If you guys need more info or pictures just tell me, I'll do anything to fix my phone.
Hold power down for 15+ seconds. Then hold volume up and plug in USB. This should get you into download mode to kdz. May take a few attempts.
Sent from my LG-D802 using Tapatalk
CodyMetal said:
So I tried getting Cyanogenmod 10.2 for my LG G2 (D800). I did some stuff and ended up rebooting and getting this screen.
[650] Fastboot mode started
[700] udc_start()
http://forum.xda-developers.com/attachment.php?attachmentid=2403056&stc=1&d=1384904247
I used TWRP for backup, but can't even get into phone to do anything.
Also it won't come up on my computer when I plug it in with usb. I tried both my computers and they both had the drivers but the phone won't even connect to either pc. I could connect easily the day before though.
http://forum.xda-developers.com/attachment.php?attachmentid=2403058&stc=1&d=1384904247
I also got this while pushing Power and both Volume buttons at same time.
http://forum.xda-developers.com/attachment.php?attachmentid=2403059&stc=1&d=1384904390
What should I do? :crying: If you guys need more info or pictures just tell me, I'll do anything to fix my phone.
Click to expand...
Click to collapse
I see your using Utorrent you pirate! JK
It looks as if your phone has some life left, not really too familiar with D800. Have You tried the key combo to get into TWRP? Does the D800 have download mode?
Also did you by chance flash the wrong rom (different carrier)? Did you wipe the internal storage?
It looks like the incorrect ROM was flashed, it did not like your boot.img. You should be fine. Hold down the power button for +-15s as he said. During that time the screen should turn off, back on to the LG screen, then back off again. The phone should stay powered off. Then, hold the vol- & pwr buttons, releasing them when you see the LG screen. While still on the LG screen, press and hold the power button until you arrive at the LG factory reset menu. Press the power button to confirm a factory reset, which will actually boot you into TWRP so you can restore your backup.
Ty
I got it to work again! Thanks everyone for helping me, I'll try not to break my phone again :laugh:
Thank you for these threads
CodyMetal said:
I got it to work again! Thanks everyone for helping me, I'll try not to break my phone again :laugh:
Click to expand...
Click to collapse
I have the lg g2 d800 as well and I also had a similiar issue. I wiped to clean for new rom and accidently before installing cm-10.2 I hit the reboot button. I just want to say thank you guys for all the knowledge base. Reading this thread fixed mine too.
I had similar issue couple weeks ago bad flash,no backups and unable to mount sd from custom recovery, the only way for me to fix this was to install rom via sideload, which was pain for two days.
iOSh8er said:
It looks like the incorrect ROM was flashed, it did not like your boot.img. You should be fine. Hold down the power button for +-15s as he said. During that time the screen should turn off, back on to the LG screen, then back off again. The phone should stay powered off. Then, hold the vol- & pwr buttons, releasing them when you see the LG screen. While still on the LG screen, press and hold the power button until you arrive at the LG factory reset menu. Press the power button to confirm a factory reset, which will actually boot you into TWRP so you can restore your backup.
Click to expand...
Click to collapse
Sorry to revive an old post, but this doesn't work for me. My G2 shows the same codes again. It will not go to the factory reset menu... How can I fix this?
Thanks.

[Q] Strange: Boot logo stuck, no recovery mode.

Hi guys,
Been a samsung user since S2, unfortunately ive made people bring me their devices so i can polish them, if not fix.
I got an i9505 at the moment with a very strange issues:
It boots up, hangs on the boot logo.
It boots in Download Mode, but volume up button wont work, i've opened the device and yet the button was fine.
Sometimes just connecting it to the PC using USB, the device vibrates as if it's turning on, though it vibrates every 2-3 seconds. Device is Off btw.
Recovery Mode wont boot, Home Button + Volume Up + Power Button until the thing vibrates, i release the power button, and it just hangs there. Makes me doubt it is not even reaching the point where it knows where the recovery is. However, i got it in to the blueish "booting recovery..." once, but it hanged there as well.
Am clueless here, (re)searching usually brings me near the answer, but it hasnt, i hope the answers here will do it for somebody else.
Edit: since i am doing this out of pure compassion, i have no idea what is loaded inside .
PlutoDelic said:
Hi guys,
Been a samsung user since S2, unfortunately ive made people bring me their devices so i can polish them, if not fix.
I got an i9505 at the moment with a very strange issues:
It boots up, hangs on the boot logo.
It boots in Download Mode, but volume up button wont work, i've opened the device and yet the button was fine.
Sometimes just connecting it to the PC using USB, the device vibrates as if it's turning on, though it vibrates every 2-3 seconds. Device is Off btw.
Recovery Mode wont boot, Home Button + Volume Up + Power Button until the thing vibrates, i release the power button, and it just hangs there. Makes me doubt it is not even reaching the point where it knows where the recovery is. However, i got it in to the blueish "booting recovery..." once, but it hanged there as well.
Am clueless here, (re)searching usually brings me near the answer, but it hasnt, i hope the answers here will do it for somebody else.
Edit: since i am doing this out of pure compassion, i haven o idea what is loaded inside .
Click to expand...
Click to collapse
Flash a stock rom base in your country mate via odin and you can download it from here http://www.sammobile.com/firmwares/2/ , then once your done downloading the file, Boot into Download mode (Power+VolumeDown) , Open Odin select PDA /AP , Connect both cables (Wait until you get a blue sign in Odin)and flash away.If you encounter any issues with the firmware (Any FC, Bootloop etc)Boot into recovery mode (power+vol up),Choose to wipe/factory reset. (THIS WILL ERASE ALL OF YOUR DATA INCLUDING YOUR INTERNAL SD CARD! Then choose reboot and you should be good to go! Have a nice day
Mate, is there a way to flash through Odin without pressing the Vol Up button, cause i am not aware of that?
I cant get past the first point of download mode, to actually enter you need to press Vol up.
PlutoDelic said:
Mate, is there a way to flash through Odin without pressing the Vol Up button, cause i am not aware of that?
I cant get past the first point of download mode, to actually enter you need to press Vol up.
Click to expand...
Click to collapse
try to remove your battery for 10 sec and put it back mate , and then try O press and hold Power+Volumedown to see if you can boot it. or you can try to connect to kies 3
Already done that tbh. Battery was off for like a day. I was hoping for that qualcomm boot mode, but doesnt seem to work.
PlutoDelic said:
Already done that tbh. Battery was off for like a day. I was hoping for that qualcomm boot mode, but doesnt seem to work.
Click to expand...
Click to collapse
I think the best u can do is get it to the service center for repair
Joku1981 said:
I think the best u can do is get it to the service center for repair
Click to expand...
Click to collapse
Hence the thread. There was no other option left.
I usually do this to gain the knowledge for future use, is this a common death for the S4. the user that had it is definitely not a flasher, what couldve gone wrong?
PlutoDelic said:
Hence the thread. There was no other option left.
I usually do this to gain the knowledge for future use, is this a common death for the S4. the user that had it is definitely not a flasher, what couldve gone wrong?
Click to expand...
Click to collapse
Options:
- WATER inside the phone
- Motherboard failed
- The phone felt to the ground

LG G2 fully BRICKED no download no recovery

Hey,
My LG G2 802 is fully bricked now. I can't get anything alse that LG splash screen, I tried entering download or fastboot mode but with no luck.
It happend when my ROM flashing software crashed in the middle of process.
Help me out guys.
i have the same. No download mode, no recovery. Ubuntu don't recognize my G2 (i try all tutorials). Only i saw LG screen. When i press vol- and power 2 times i have option FACTORY RESET but when i do this i saw only FACTORY SETTINGS PROCESSING and stop at this. After restart only LG.
witek_77 said:
i have the same. No download mode, no recovery. Ubuntu don't recognize my G2 (i try all tutorials). Only i saw LG screen. When i press vol- and power 2 times i have option FACTORY RESET but when i do this i saw only FACTORY SETTINGS PROCESSING and stop at this. After restart only LG.
Click to expand...
Click to collapse
Exacly the same story with factory reset.
1. un plug device from wall or pc
2 make sure phone is all the way off (hold down power and volume down) untill it stops booting
3. hold volume UP while plugging device into pc
4. follow these instructions to return to stock http://www.droidgreen.com/lg-g2-official-stock-android-firmware-rom/
5. allow usb debuging in dev options and install unknown sources in security
6. to root your device go to towelroot.com download apk and install
7. to flash custom recovery use freegee its found in playstore
my phone havent got download mode. I flash KDZ on blue dots downlad mode. After this my phone has bricked. Only black screen. After this i have flash on ubuntu partitions and twrp. Ewerything was ok but after restart my phone dont go to TWRP. Only LG. Now i cant do anything. I havent got download mode and after VOL- and POWER my recovery dont do anything. On monday i will send my phone to service.
IT WORKS!
Well.. problem has been solved almost it self. As I said before I was trying do hold volume UP and plug it to the computer. But phone was showing only the LG logo and that's all. Linux didn't see it either.
When every idea was used I tried to completly discharge it. When it turn off i tried to plug it in and check what happens but AGAIN I saw only LG splash screen and I left it in that way. I came back after maybe 10-15min and I found phone in Download Mode. Linux saw it and without any problem I installed fresh ROM.
Really I can't explain this but it's just happend. So my advice, try any possible solution and method.
Good Luck guys!
Glad to here sound like your device wasn't fully powered off patience is pretty mine say on download mode doing nothing fir 10 minutes once [emoji106]
Tapatalked from a Cloudy G3.
"hit thanks if ive helped" ?
ick56 said:
Well.. problem has been solved almost it self. As I said before I was trying do hold volume UP and plug it to the computer. But phone was showing only the LG logo and that's all. Linux didn't see it either.
When every idea was used I tried to completly discharge it. When it turn off i tried to plug it in and check what happens but AGAIN I saw only LG splash screen and I left it in that way. I came back after maybe 10-15min and I found phone in Download Mode. Linux saw it and without any problem I installed fresh ROM.
Really I can't explain this but it's just happend. So my advice, try any possible solution and method.
Good Luck guys!
Click to expand...
Click to collapse
Thank you, Ick56, for the ray of hope you've given me. My G2 is fully discharged since yesterday and I'm on the same boat as you - no recovery, no download, no fastboot, not detected by the computer. I'm trying your way now. My question is - when you plugged it in fully discharged, did you hold any buttons?
Thanks again and thanks in advance!
kaha6uc said:
Thank you, Ick56, for the ray of hope you've given me. My G2 is fully discharged since yesterday and I'm on the same boat as you - no recovery, no download, no fastboot, not detected by the computer. I'm trying your way now. My question is - when you plugged it in fully discharged, did you hold any buttons?
Thanks again and thanks in advance!
Click to expand...
Click to collapse
Volume up when you plug it into the computer.
nms247 said:
Volume up when you plug it into the computer.
Click to expand...
Click to collapse
Thank you for your answer, but I wasn't asking how to get to download mode. I was asking the OP what he did when his battery was fully discharged.
kaha6uc said:
Thank you, Ick56, for the ray of hope you've given me. My G2 is fully discharged since yesterday and I'm on the same boat as you - no recovery, no download, no fastboot, not detected by the computer. I'm trying your way now. My question is - when you plugged it in fully discharged, did you hold any buttons?
Thanks again and thanks in advance!
Click to expand...
Click to collapse
I just plugged it in to the computer. Yes, it's sounds ridiculous but in some way after few minutes it worked. Maybe try it with volume up too, who knows what will happen ;p
Good Luck!
ick56 said:
I just plugged it in to the computer. Yes, it's sounds ridiculous but in some way after few minutes it worked. Maybe try it with volume up too, who knows what will happen ;p
Good Luck!
Click to expand...
Click to collapse
Thanks again. Here's what happens:
1. While unplugged, I entered the Factory Reset mode and left it as it is (didn't push any buttons) in order for the display to drain the battery;
2. When the battery was drained the phone went off;
3. After waiting for a few seconds I plugged it into the computer;
4. The red led was flashing for a minute or so and then the LG logo came on;
5. I'm now waiting.
Will post again when/if anything happens
EDIT: Almost an hour now and still only LG logo
i have the same.
kaha6uc said:
Thanks again. Here's what happens:
1. While unplugged, I entered the Factory Reset mode and left it as it is (didn't push any buttons) in order for the display to drain the battery;
2. When the battery was drained the phone went off;
3. After waiting for a few seconds I plugged it into the computer;
4. The red led was flashing for a minute or so and then the LG logo came on;
5. I'm now waiting.
Will post again when/if anything happens
EDIT: Almost an hour now and still only LG logo
Click to expand...
Click to collapse
If your light flashed red that means it is charging you HAVE to hold the up volume WHILE plugging it in in to enter download mode DONT DRAIN BATTERY TO COMPLETELY POWER OF HOLD VOL DOWN AND POWER UNTIL OT STOPS BOOTING THEN PLUG IT IN WHILE HOLDING VOL UP
Tapatalked from a Cloudy G3.
"hit thanks if ive helped" ?

Recovery Is Not Seandroid Enforcing

I tried to root my phone S7 Edge 6.1.1 just a moment ago using ODIN and CF Auto Root. I got the PASSES! sign in ODIN but upon phone rebooting I am stuck on the Samsung S7 Edge logo screen with text in red 'Recovery Is Not Seandroid Enforcing" up the top.
At this time I am unable to turn my phone off, when I do it just turns back on and goes to the same screen. I can't get into download or recovery mode either.
Any help on how to fix would by greatly appreciated.
Thanks in advance.
Also thought I should add, my phone doesn't get registered when I connect it to my PC either, it wont show up in ODIN so I am unable to flash a stock recovery at this time.
It's trying to boot into recovery.
When you say you rooted with CF Auto Root, what did you do precisely? And did you follow Chainfire's specific instructions regarding the lack of screen output during the process?
Beefheart said:
It's trying to boot into recovery.
When you say you rooted with CF Auto Root, what did you do precisely? And did you follow Chainfire's specific instructions regarding the lack of screen output during the process?
Click to expand...
Click to collapse
Thanks for the reply.
I used CF-Auto-Root-zerolte-zeroltexx-smg925f.tar to root.
The steps I used was to simply put my phone into download mode and use ODIN to flash the file mentioned above. That is as far as I got unfortunately. I did this once before, a few month back when I first got the phone with no issues. I remember having to install TWRP but I couldn't remember if I did that pre-root or post-root. But I think that is where I went wrong.
Now I am unable to do anything with my phone. I can't turn it off, get into download or recovery mode. When I hold down VOL UP+POWER+HOME it just resets the phone back to the samsung logo screen.
Any ideas on what I could do?
You used the CF Auto Root file for an S6 Edge.
Beefheart said:
You used the CF Auto Root file for an S6 Edge.
Click to expand...
Click to collapse
OH GOD. You're right. I just realized that. I was supposed to have them saved into their own folders but I guess I saved that one too the wrong folder.
So what does that mean for the life of my phone then? Is it toast or is it recoverable somehow?
What is your model? Is it the SM-G935F? If so, first things first, download the correct CF Auto Root file for your device (here) and try again. Press VOL DOWN+POWER+HOME and it should reboot into Download Mode. Then try to flash the correct file in Odin again.
These phones are very difficult to hard brick, especially with something like CF Auto Root so you should be ok.
Beefheart said:
What is your model? Is it the SM-G935F? If so, first things first, download the correct CF Auto Root file for your device (here) and try again. Press VOL DOWN+POWER+HOME and it should reboot into Download Mode. Then try to flash the correct file in Odin again.
These phones are very difficult to hard brick, especially with something like CF Auto Root so you should be ok.
Click to expand...
Click to collapse
Thanks.
Yes, it is a SM-G935F. Unfortunately I am unable to reboot the phone into Download Mode. When pressing VOL DOWN+POWER+HOME it just takes me straight back to the Samsung logo where it says "Recovery Is Not Seandroid Enforcing". I'm hoping that once the battery drains completely I will be able to boot into Download Mode again.
Try simply resetting it instead. Press volume down and the power key (don't press home) for around 7-10 seconds. Once it starts to reset, remove your fingers from the buttons very briefly then press volume down, home and power to enter download mode.
Beefheart said:
Try simply resetting it instead. Press volume down and the power key (don't press home) for around 7-10 seconds. Once it starts to reset, remove your fingers from the buttons very briefly then press volume down, home and power to enter download mode.
Click to expand...
Click to collapse
That hasn't worked either unfortunately.
I just found this thread from a guy having a similar problem. He just had to wait for his phone's battery to drain completely and then he was able to enter download mode again.
You shouldn't have to though. If you can get the phone to reset at all (even if it's to make another attempt to go into recovery) then providing you time it right, you should be able to get into download mode. Did keeping your fingers on just the volume down and power buttons do anything? Keep them on continuously for up to 20 seconds and see what happens. Did you say pressing vol up & home & power made it reset and try to again get into recovery? What happens if, as soon as the screen indicated it's resetting, you remove your fingers and quickly press vol down & home & power instead?
Anyway, even if you have to wait until the phone dies, getting into download will be possible eventually. Then worst case scenario would be you having to reflash stock back. Or, as would be my preference, flash TWRP then flash a custom rom zip like Superman.
Just to confirm, I take it you selected OEM Unlock in dev options?
Beefheart said:
You shouldn't have to though. If you can get the phone to reset at all (even if it's to make another attempt to go into recovery) then providing you time it right, you should be able to get into download mode. Did keeping your fingers on just the volume down and power buttons do anything? Keep them on continuously for up to 20 seconds and see what happens. Did you say pressing vol up & home & power made it reset and try to again get into recovery? What happens if, as soon as the screen indicated it's resetting, you remove your fingers and quickly press vol down & home & power instead?
Anyway, even if you have to wait until the phone dies, getting into download will be possible eventually. Then worst case scenario would be you having to reflash stock back. Or, as would be my preference, flash TWRP then flash a custom rom zip like Superman.
Just to confirm, I take it you selected OEM Unlock in dev options?
Click to expand...
Click to collapse
I have never had any trouble getting into recovery or download before so I know the method. But just the properly clarify for you I will explain some of the combination I have tried without success. Bare in mind the phone is constantly turned on and idles on the Samsung logo.
I have tried:
Hold VOL DOWN+POWER+HOME, the phone resets and goes back to the logo.
Hold VOL DOWN+POWER, same as above.
Hold VOL UP+POWER+HOME, nothing happens at all.
Hold VOL UP+POWER, same as above.
Hold VOL DOWN+POWER+HOME, release and repress all on black screen, just goes back to logo.
Hold VOL DOWN+POWER, release and hold VOL DOWN+POWER+HOME on black screen, just goes back to logo.
and numerous other things like random combination to try and enter Download or Recovery mode, which have all failed.
Right now it's just stuck on the Samsung logo and staying there, taking forever to drain battery. I work in the morning so hopefully it is dead by then and I can get into Download mode.
Have already started download stock firmware in hopes that I will be able to flash it after.
Thanks a bunch for your help. If you think of anything else I might be able to try let me know!
Oh wow. 100+ attempts and I followed your last post about holding for up to 20 seconds. I was waiting ~5 seconds and releasing thinking that it hadn't worked.
Finally go into Download mode and will flash stock firmware and let you know how I go.
Thanks again! I owe you a cold one.
EDIT: Was no need to flash stock firmware. Just flashed the proper version of CF Auto Root and it worked. Again, thank you so much!
Fantastic. Hope you get it sorted.
On a side note, you have probably already tripped knox and you will have lost you OS data and possibly even what you have stored on internal storage. If so, I suggest you install TWRP, format data (you will lose everything with this but it removed encryption) and install a custom rom like Superman 1.9 from your external SD. It's better than plain stock and comes pre-rooted with plenty of other mods.
I can't get it to work? What keys did you held down?
This is how my screen looks
cs5-2.4pda.to/7951347.jpg (copy this link in browser)
I tried to root with Odin but I think I might have failed. How can I undo this?
recovery is not seandroid enforcing
hello,
my S7 Edge was rooted with cf-auto-root and worked fine but after 2 monthe I've installed LBE_Security_Rel_6.1.1928_A1_DE_v5_signed and reconized the message device is not tooted.
I was not very clever and cofirmed the question "fix the root problem" I don't remember exactly the words. After that root was gone.
I've flashed the stock Fw G935FXXU1APD1_G935FDRE1APC3_DRE but I still have the message "recovery is not seandroid enforcing" after trying to root with CF auto root.
AP:G935FXXU1APD1
CP:G935FXXU1APD1
CSC:G935FDRE1APC3
Is there any way to get root again
Any help on how to fix would by greatly appreciated.
Thanks in advance.
doodlemeat said:
I can't get it to work? What keys did you held down?
This is how my screen looks
cs5-2.4pda.to/7951347.jpg (copy this link in browser)
I tried to root with Odin but I think I might have failed. How can I undo this?
Click to expand...
Click to collapse
Simply hold down Home + Power + Volume Down for 10-15 seconds - don't release when the phone initially reboots and gives the same error, keep them held down and download mode will appear. I have to hold for 11 seconds, a strangely unrounded number.
Hello Guys I have this Same issue Yesterday....... This happens when you flash outdated CF Autoroot. CF Autoroot Updated on 25/08/2016... Download it...
Fix for Stuck in Logo Screen
Just Click and Hold ...... Vol Down + Menu + Power Keys ...... DO NOT RELEASE. IT Will Restart. DONT release. It will restart again and you will be download mode.
i found this during the rooting process. its a bit different to older samsungs on the s7 / s7edge. YOU HAVE TO KEEP HOLD OF VOL DOWN + HOME + POWER until it enters download mode, which can be 20-25 seconds

LG G2 Boot security error after trying to flash SuperSu after going to LineageOS 14.1

I've been using Cyanogenmod 13.1 (rooted) and I decided to flash a ROM with Nougat. I flashed lineage-14.1-20170320-nightly-d802-signed and open_gapps-arm-7.1-mini-20170325 and everything worked fine except I didn't have SuperSU. I tried flashing SuperSU-v2.79-201612051815 and when I tried to boot into system I got this screen (with the LG logo below) http://i.imgur.com/O7vOtab.png I tried many methods like this https://forum.xda-developers.com/showthread.php?t=2582142 and this https://forum.xda-developers.com/lg-g2/general/lg-g2-unbrickable-fix-real-hard-brick-t2904404 to no avail. In Linux when I used the ls /dev/sd* command in the terminal the phone wouldn't show up and later in Windows I got the PC to recognize the phone as Marshall USB Composite Device 9006 http://i.imgur.com/a5WHV9P.png and in Disk Management the phone partition shows up un-initialised http://i.imgur.com/XaVKIu7.png . Help I don't know what to do now. Tell me if I should provide more information.
I had the exact same problem. Then i found a solution. Just dont flash the normal Supersu, you need to flash the Supersu BUMPED file. Just go in recovery, press 10 sec the power button to be sure the phone is off, then hold volume down and power button until the logo appears, then release and press again (fast) then choose yes, yes. Just flash the Bumped and if recovery asks to do root choose NO.
The Bumped which worked for me
http://www108.zippyshare.com/v/ZjxTLdkp/file.html
I hope i could help
RelaxBuddy said:
I had the exact same problem. Then i found a solution. Just dont flash the normal Supersu, you need to flash the Supersu BUMPED file. Just go in recovery, press 10 sec the power button to be sure the phone is off, then hold volume down and power button until the logo appears, then release and press again (fast) then choose yes, yes. Just flash the Bumped and if recovery asks to do root choose NO.
The Bumped which worked for me
I hope i could help
Click to expand...
Click to collapse
Well I had no luck getting into recovery before but that was before I took apart my phone because I couldn't turn it off (it keeped bootlooping) but I will try, thanks
Bluellama said:
Well I had no luck getting into recovery before but that was before I took apart my phone because I couldn't turn it off (it keeped bootlooping) but I will try, thanks
Click to expand...
Click to collapse
Yeah Bad same Problem, turned off and it went on, then again bootloop. But if you press the power button long enough then its completely off. In cyanogen mod i had Problem that i couldnt get into recovery with power button+volume down.
So you should flash kdz, get oneclickroot for LG g2, then autorec lollipop to get recovery. Then flash Rom + gapps + The bumped file.
If you dont know how to flash kdz, you can ask here. I will help
Good luck
RelaxBuddy said:
Yeah Bad same Problem, turned off and it went on, then again bootloop. But if you press the power button long enough then its completely off. In cyanogen mod i had Problem that i couldnt get into recovery with power button+volume down.
So you should flash kdz, get oneclickroot for LG g2, then autorec lollipop to get recovery. Then flash Rom + gapps + The bumped file.
If you dont know how to flash kdz, you can ask here. I will help
Good luck
Click to expand...
Click to collapse
Previously I couldn't go into download mode but I will try now since I managed to turn off the smartphone completely. Before it would just stay on with a black screen.
Bluellama said:
Previously I couldn't go into download mode but I will try now since I managed to turn off the smartphone completely. Before it would just stay on with a black screen.
Click to expand...
Click to collapse
Yeah Ok. When I wanted to turn It off, I just pressed the power button until the screen went black and the logo came again but after 2-3 sec the screen went black again, then it was off (just hold power button for 10sec)
Try that when your phone keeps restarting
RelaxBuddy said:
Yeah Ok. When I wanted to turn It off, I just pressed the power button until the screen went black and the logo came again but after 2-3 sec the screen went black again, then it was off (just hold power button for 10sec)
Try that when your phone keeps restarting
Click to expand...
Click to collapse
KDZ flashing gets stuck at 60% (Verifying phone connection) http://i.imgur.com/AAHKqcd.png
Should I just let it sit through its emotional problems?
Bluellama said:
KDZ flashing gets stuck at 60% (Verifying phone connection) http://i.imgur.com/AAHKqcd.png
Should I just let it sit through its emotional problems?
Click to expand...
Click to collapse
Get the lg mobile support tool, install it. Then open and connect your phone via download mode, it will find the phone and download the kdz for it. That should work.
If it doesn't install automatically, click on additional options then click on set upgrade error back, or something like that.
Before all that install the driver from
http://www.lg.com/de/support/service-mobil-telefon/lg-G2
Then you can start with lg mobile support tool
RelaxBuddy said:
Get the lg mobile support tool, install it. Then open and connect your phone via download mode, it will find the phone and download the kdz for it. That should work.
If it doesn't install automatically, click on additional options then click on set upgrade error back, or something like that.
Before all that install the driver from
http://www.lg.com/de/support/service-mobil-telefon/lg-G2
Then you can start with lg mobile support tool
Click to expand...
Click to collapse
Ok I managed to flash a stock rom and the problem was... usb 3.0. I connected the phone to usb 2 and it worked flawlessly. If anybody has a problem like I did you can message me

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