Develop Bugs

[Q] HELP! Lost download mode! LG E970

Hello, So i tryed to flash to CM10 rom for LG E970 and my screen went black after reboot. So then I tried t go back to stock with LGNPST and it would get to the logo and stop. So then (lol) I tried using a teenybin instead and now I can't get download mode to show up and all the screen will do it show a gray battery with a lighting bolt and sometimes when trying to power on or get to download mode it'll act like it's about to do something and shows a black screen with google in grey and an unlocked lock at the bottom of the screen. Help is all lost or can i fix this??

Dreadingdawn said:
Hello, So i tryed to flash to CM10 rom for LG E970 and my screen went black after reboot. So then I tried t go back to stock with LGNPST and it would get to the logo and stop. So then (lol) I tried using a teenybin instead and now I can't get download mode to show up and all the screen will do it show a gray battery with a lighting bolt and sometimes when trying to power on or get to download mode it'll act like it's about to do something and shows a black screen with google in grey and an unlocked lock at the bottom of the screen. Help is all lost or can i fix this??
Click to expand...
Click to collapse
Use the KDZ Updater with the latest firmware version of your phone...
First, download and install the latest lg driver. (your phone must be unplugged when installing)
Second, download the LG E970 kdz.
Third, "google" and install the kdz updater.
Fourth, put your phone in "Download mode" by pressing both volume keys and plug into usb port (wait 2-3 seconds, your computer will load the driver)
Fifth, open the kdz updater and select "3GQCT" in type...and "CS_Emergency" in phone mode. Then browse & select the kdz you've just downloaded...and press the Launch button. It should take about 8-10 minutes to complete...your phone will reboot around param.94 then you can unplugged it and let it boot normally.
Finally, make a "factory reset" to erase all previous data and plug your phone to wall charger to gave him some fresh blood.
Give us some feedback & good luck :good:
Sent from my AOSP on geeb_att_us using xda premium

Dreadingdawn said:
Hello, So i tryed to flash to CM10 rom for LG E970 and my screen went black after reboot. So then I tried t go back to stock with LGNPST and it would get to the logo and stop. So then (lol) I tried using a teenybin instead and now I can't get download mode to show up and all the screen will do it show a gray battery with a lighting bolt and sometimes when trying to power on or get to download mode it'll act like it's about to do something and shows a black screen with google in grey and an unlocked lock at the bottom of the screen. Help is all lost or can i fix this??
Click to expand...
Click to collapse
Try to get in donwload mode pushing together volume+ and volume- and then plug in the usb cable (to your pc) do not release the buttons until you see the download mode logo on the screen. The phone has to be off before doing the procedure if it wont turn off , push the power button for something like 15 sec, should go off that way
Good luck and in the event that you can't go in download mode anymore , take it to assistance. It's the only way.

JasonBourne.Qc said:
Use the KDZ Updater with the latest firmware version of your phone...
First, download and install the latest lg driver. (your phone must be unplugged when installing)
Second, download the LG E970 kdz.
Third, "google" and install the kdz updater.
Fourth, put your phone in "Download mode" by pressing both volume keys and plug into usb port (wait 2-3 seconds, your computer will load the driver)
Fifth, open the kdz updater and select "3GQCT" in type...and "CS_Emergency" in phone mode. Then browse & select the kdz you've just downloaded...and press the Launch button. It should take about 8-10 minutes to complete...your phone will reboot around param.94 then you can unplugged it and let it boot normally.
Finally, make a "factory reset" to erase all previous data and plug your phone to wall charger to gave him some fresh blood.
Give us some feedback & good luck :good:
Sent from my AOSP on geeb_att_us using xda premium
Click to expand...
Click to collapse
Rockguy40 said:
Try to get in donwload mode pushing together volume+ and volume- and then plug in the usb cable (to your pc) do not release the buttons until you see the download mode logo on the screen. The phone has to be off before doing the procedure if it wont turn off , push the power button for something like 15 sec, should go off that way
Good luck and in the event that you can't go in download mode anymore , take it to assistance. It's the only way.
Click to expand...
Click to collapse
Hey thanks for the help guys :good: but it's not even charging anymore and has died lol so i'm gonna let the nice folks over at mobiletechvideos.com JTAG it. Again thanks!! :fingers-crossed:

[Q] [HELP] No OS, No Recovery Mode, No download mode?

So basically I screwed up really badly, and wiped absolutely everything on my S3 while half awake. All I get is stuck on the boot logo. When I try and boot into recovery, it says its trying to boot but just locks on the samsung logo, and when I try and use download mode it flashes the screen with the warning about installing custom OS on it, then gets locked on the samsung logo. Am I totally screwed here? Sorry if this has been asked before, I've been looking through about 30+ tabs on chrome right now for any sort of solution.

When you see the warning message in download mode, do you press the volume up key to get iinto download mode?

audit13 said:
When you see the warning message in download mode, do you press the volume up key to get iinto download mode?
Click to expand...
Click to collapse
I dont even get the chance to select anything, it disappears right away. I also was able to get it to connect somehow to ODIN, and got a pass on flashing a stock rom. Stuck on at the logo screen again, but its progress!
EDIT: IT BOOTED! I dont know how i got through it not doing anything, but ODIN worked! thanks for trying to help buddy

Lg g3 ls990 stuck in bootloop, no download mode / fastboot mode

hello guys, i tried installing twrp on my lg g3. it seems it flashed a wrong file and now my phone is stucke din boot loop, i cant enter download mode and fastboot mode. lg logo appears , screen dims and bootloops agaiin....pls help...beeen searching througgh all the threads but no help..
SPRINT LG G3 (LG LS990)

colby950 said:
hello guys, i tried installing twrp on my lg g3. it seems it flashed a wrong file and now my phone is stucke din boot loop, i cant enter download mode and fastboot mode. lg logo appears , screen dims and bootloops agaiin....pls help...beeen searching througgh all the threads but no help..
SPRINT LG G3 (LG LS990)
Click to expand...
Click to collapse
Try to take out the battery. After put it back and press the volume up and plug in a the lg micro USB to your phone but before doing that be sure it is plug in to your computer and wait until you see the download mode. I forgot the video link but just search up unbrick,unroot lg g3 on YouTube and search for the video that you see a lg g3 with a blue screen and a number 3 in the middle. After you find the video use it to guide your self to repair your lg g3. Hopes it helps please message me back if you do it and if you what I can help if it doesn't help.

jonnyszt said:
Try to take out the battery. After put it back and press the volume up and plug in a the lg micro USB to your phone but before doing that be sure it is plug in to your computer and wait until you see the download mode. I forgot the video link but just search up unbrick,unroot lg g3 on YouTube and search for the video that you see a lg g3 with a blue screen and a number 3 in the middle. After you find the video use it to guide your self to repair your lg g3. Hopes it helps please message me back if you do it and if you what I can help if it doesn't help.
Click to expand...
Click to collapse
pls it didnt work . as soon as i plug in my usb the charging signal shows then the phone boots on its on to lg logo. and bootlooop begins

Did you press volume up ?

Yes only the volume up does it in plug in the micro USB that is already connect to your PC (use your original cable)

volume up not working .
jonnyszt said:
Yes only the volume up does it in plug in the micro USB that is already connect to your PC (use your original cable)
Click to expand...
Click to collapse
yes i did. still not working

Could you enter recovery mode?

jonnyszt said:
Could you enter recovery mode?
Click to expand...
Click to collapse
no please. it is just the bootloop . no download mode , recovery mode and fastboot mode. tried installing twrp but instllled a wrong file instead

What happens when you connect your phone to your computer

jonnyszt said:
What happens when you connect your phone to your computer
Click to expand...
Click to collapse
nothing happens . the battery signal appears and phone powers on its own to start its bootloop
when i remove the battery and connect it to the computer it shows as unknown device in the usb controlllers section.

That weird, how did you get to the bootloop(what did you do before the bootloop happen

jonnyszt said:
That weird, how did you get to the bootloop(what did you do before the bootloop happen
Click to expand...
Click to collapse
i flashed a wrong twrp file

That happen to me , the light started blinking red and blue (first time turning off)

jonnyszt said:
That happen to me , the light started blinking red and blue (first time turning off)
Click to expand...
Click to collapse
mine went off...tried to power it up and in bootloop. what did you do to fix urs

I was able to enter download mode but your case is worst. What color where the led light flashing when it shut down (after installing the wrong twrp) and when booting up
---------- Post added at 01:11 AM ---------- Previous post was at 01:00 AM ----------
So any news?

jonnyszt said:
I was able to enter download mode but your case is worst. What color where the led light flashing when it shut down (after installing the wrong twrp) and when booting up
---------- Post added at 01:11 AM ---------- Previous post was at 01:00 AM ----------
So any news?
Click to expand...
Click to collapse
Hi!! Im in the same case
My phone reboot itself and show LG logo then Android logo then black screen.
Tried on Win 8 x64, FlashTool 1.8.6.527
- reboot
- take off the battery and turn on
- wipe
Result
-same lg logo, android logo, Black Screen
Tried
-http://forum.xda-developers.com/sprint-lg-g3/general/guide-how-to-restore-sprint-lg-g3-ls990-t2852042
Result
-Flash Tool error diferent model (D855)
Then I opened the phone looking for mother board model and it is LS990.
Tried
- flash with D855 .dll and .tot files
Result
- error on partition change fail
- trwm recovery delete
- the phone just enter on donwload mode vol +, vol- and without push the vol buttons the phone enter in download mode
Tried on windows 7 x86
- again flash with LS990 dll, tot and D855 dll, tot
Result
- the same errors using LS990 dll or tot
Tried
-Flashing with D855 tot and LGUP_8974.dll
Result
- Lg logo loop
- no download mode, vol buttons just not work
Any Ideas?
can I install custom recovery and try somthing from there?

Search online, there is a forum to restore your download mode if you want it
Sent from my Moto G using Tapatalk

hello same problème , bootloop no download mode , juste factory hard reste and hardware control , the only way to make pc reconnise a unknow usb device is to connect phone without battery , is there a special driver for that ?
or any othere way to fix my phone
oh yes ,sorry i have LG G3 D855 32g

H815 Soft bricked(?) adb shows device offline

Soo.... I messed up and edited the build.prop specificly the ro.build.type property. I tried to enable some debug options without validating if this would be a good idea (hint: it's not).
It seems that this has bricked my phone, the first LG splash screen shows up with the powered by android, and the second animation just keeps loading forever (making the phone very hot). And the LED flashes blue continously.
I did manage to get the device visible in ADB but it tells me that the device is offline so I can't do anything with it.
Tried booting in recovery mode (holding power button + volume down) but it just own't go into recovery mode.
Some extra info of what runs on my phone:
- version H815
- Android 6.0
- bootloader unlocked
- TWRP installed
- Rooted
- XPosed installed
Any idea on what I could try to fix it? (I guess stuck with a brick but oh well).
Thanks!

What do you mean, by it can't go into recovery mode?
Nothing is showing on screen?

Go to downlod mode either use lgup or lg flashtool to reflash the firmware that you are on... Do u remember which firmware you were on ?

Thanks for the replies!
Vortuks said:
What do you mean, by it can't go into recovery mode?
Nothing is showing on screen?
Click to expand...
Click to collapse
I meant that it just boots 'normally' when I press those buttons, it shows me the first LG logo and the second animation just hangs, whatever I do. I tried all sorts of combinations with the power button + volume down. (Keeping it pressed, briefly letting it go after the lg logo and repressing them).
jinderation said:
Go to downlod mode either use lgup or lg flashtool to reflash the firmware that you are on... Do u remember which firmware you were on ?
Click to expand...
Click to collapse
I don't know exactly which firmware I was on but I can't even get my phone into download mode (same as my other response, pressing volume up doesn't do anything).
The recovery and download mode used to work but I have no idea why it doesn't now...

When booting the phone, hold the power button and volume down button simultaneously, when LG logo appear, push the power button again. You should see the white screen, where you choose "YES" twice. Then the phone should kick you into TWRP or different recovery mode.

But how the hell editing build.prop can mess with recovery and download mode? Sounds incredible

Vortuks said:
But how the hell editing build.prop can mess with recovery and download mode? Sounds incredible
Click to expand...
Click to collapse
Maybe he has bootloop issue... ILAPO

Yeah I have no idea why the buttons aren't working for me. After a lot of searching I found this thread:
http://forum.xda-developers.com/g4/help/soft-bricked-device-t3248144
Which is basicly the same thing I'm experiencing, ADB comes online for just a brief second (kept spamming the reboot recovery command) and got in TWRP and I just flashed another which worked fine.
Odd thing is, even now my phone works I can't start recovery or download with the hardware buttons...... oh well, thankfully adb works as it's supposed to.
Thank you all for your help!

G4 won't go into Firmware Update mode or Factory Reset

Hi, I have an LG G4 that is boot looping, I have changed firmware in the past using LG UP and factory reset G4's before.
But when I hold volume up and plug in the usb cable, it goes to the 'download mode' screen but never reaches the firmware update screen, anyone had this problem before? This happens every time I try.
And when I try to do a factory reset by holding vol down and power and release and re pressing the power button it goes into the factory reset options, but it freezes on the last screen and won't actually start resetting.
So I can't use LG UP or LG flash tool as it won't go into firmware update mode.
Any Ideas?
Thank you.

mikeyrut said:
Hi, I have an LG G4 that is boot looping, I have changed firmware in the past using LG UP and factory reset G4's before.
But when I hold volume up and plug in the usb cable, it goes to the 'download mode' screen but never reaches the firmware update screen, anyone had this problem before? This happens every time I try.
And when I try to do a factory reset by holding vol down and power and release and re pressing the power button it goes into the factory reset options, but it freezes on the last screen and won't actually start resetting.
So I can't use LG UP or LG flash tool as it won't go into firmware update mode.
Any Ideas?
Thank you.
Click to expand...
Click to collapse
Open "Device Manager" in windows and see if windows is not changing your device driver automatically...

I have got it to go into firmware update mode, and I used LG UP to install 5.1 firmware and used the big core disable tot, it was up and running fine, then suddenly turned off.
Now it's boot looping again and when i go to go into recovery mode, it's on the download mode screen and just goes black and turns itself off again.
Any ideas?

mikeyrut said:
I have got it to go into firmware update mode, and I used LG UP to install 5.1 firmware and used the big core disable tot, it was up and running fine, then suddenly turned off.
Now it's boot looping again and when i go to go into recovery mode, it's on the download mode screen and just goes black and turns itself off again.
Any ideas?
Click to expand...
Click to collapse
Try reflash a kdz file following this method:
http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Hope it helps