fastboot help verizon lg g3 - G3 Q&A, Help & Troubleshooting

Hello, I just got my g3 and decided to root it. I used stump root to do that, then installed twrp. I flashed the latest cyanogenmod rom and everything was good. this morning i opened the phone and now get a loop of
unfortunatly the process phone has stopped
I looked it up and the fix seems to be flashing the boot img to my phone via fast boot.
this is where I am having isues. i have fast boot on my computer, but I am not able to get my phone into fastboot mode, I tryed holding vol up while plugging in the usb, but that just turned the phone on normally. I tryed a few other things that I really don't remember, but now I can get the phone to a screen that says Firmware Update. butfast boot wont recognize my phone is there when I type fastboot devices. please help, I'm not very good with this so any instructions need to be dumbed down and maybe a pic of what my phone screen should look like would help

tekkaman_01 said:
Hello, I just got my g3 and decided to root it. I used stump root to do that, then installed twrp. I flashed the latest cyanogenmod rom and everything was good. this morning i opened the phone and now get a loop of
unfortunatly the process phone has stopped
I looked it up and the fix seems to be flashing the boot img to my phone via fast boot.
this is where I am having isues. i have fast boot on my computer, but I am not able to get my phone into fastboot mode, I tryed holding vol up while plugging in the usb, but that just turned the phone on normally. I tryed a few other things that I really don't remember, but now I can get the phone to a screen that says Firmware Update. butfast boot wont recognize my phone is there when I type fastboot devices. please help, I'm not very good with this so any instructions need to be dumbed down and maybe a pic of what my phone screen should look like would help
Click to expand...
Click to collapse
download the drivers for your phone(google it)

Related

[Q] 'Secure boot Error!' at boot, download mode and factory reset don't work

Hello,
Here is what led to my issue:
I rooted my phone using this method: http://forum.xda-developers.com/showthread.php?p=38886073#post38886073
Downloaded clockwork rom manager.
Here comes the thing I don't remember. At least i know that the last thing i did was to click on 'backup current rom'
After this the phone reset itself and this message came up:
Secure booting error!
Cause: boot certification verify
Then i tried to reset using the power button, which led me to the 'battery full' screen - afterwards i was able to reboot. As stupid as I am I just tried the same thing again. And ever since i am stuck at the 'Secure booting error!' screen.
I am unable to enter download mode. I get to the 'Hard factory reset' screen, but if i accept doing so, it says 'Secure booting error!' again.
I also remember clicking on 'restart into recovery mode' at some point, but this is not the last thing i did.
I am really desperate. Please, help me!
Well i had the same issue today... It happened after i did two changes. One of them was to to try to relock from freegee and flash twrp again from freegee. In my case i was able to go in download mode and flash original kk rom with lg flash tool.
Unfortunatly, trying to boot in downloadmode, i still get the same error :/
Jubi-Wan said:
Unfortunatly, trying to boot in downloadmode, i still get the same error :/
Click to expand...
Click to collapse
How are you trying to boot into download mode? And what factory reset screen? It seems as though you did not unlock the bootloader using freegee, if you make any changes and relock the boot loader you will get that error. But it seems that it has not been unlocked. If you hold power and volume up what happens? Same thing when power and volume down, one of them is recovery (possibly factory reset you are seeing) and the other is download mode. I don't remember right now but you should read the whole softbrick thread and see if you are missing something. You may need to use LGPNST to go back to stock, you can also use that program to flash a new recovery so read carefully and follow all steps.
When this happened to me I was able to flash an unlocked bootloader and it allowed me to use my phone again as it was before doing something stupid (for me it was an attempt to re lock the bootloader).
well, i managed to get into download mode. Obviously i used the wrong method to get into download mode...
I used this method and everything worked fine, so far. : http://forum.xda-developers.com/showthread.php?t=2249500
My phone doesn't boot now. Fast Boot doesnt work aswell.
All that happens is a white battery showing on the screen and when i try to fastboot all that happens is that the LED is blinking or glowing red after some while.
Jubi-Wan said:
well, i managed to get into download mode. Obviously i used the wrong method to get into download mode...
I used this method and everything worked fine, so far. : http://forum.xda-developers.com/showthread.php?t=2249500
My phone doesn't boot now. Fast Boot doesnt work aswell.
All that happens is a white battery showing on the screen and when i try to fastboot all that happens is that the LED is blinking or glowing red after some while.
Click to expand...
Click to collapse
What do you mean when you try to fastboot? Fastboot is basically the bootloader and allows you to select recovery or download mode. What you should have done after following that thread is go to recovery and wipe everything and flash a new ROM.
If you are saying that the bootloader is not coming up and allowing you into recovery then I believe something was missed.
After trying out some varioants of this it worked: http://forum.xda-developers.com/showthread.php?p=40274560&highlight=red+led#post40274560
I wiped the phone, but since I had to leave over the weekend i just turned it off and went away.
Now that I am back, nothing works now :/ The Phone doesnt react to anything, not even donwload-mode.
Is the battery too low maybe? It's on the wall now for a few hours, but it still doesn't react. It's not warm either.
edit:
when i charge the phone, i will get a 'watchdog bark' after some time allowing me to get into recovery. accesing downloadmode from there doesn't do anything. strangely, the recovery isnt trwp although it should be because teenybin comes with it. it's 'bbs.gaodi.net' which doesn't have a sideload feature. what do i do now?
edit2:
after 10000 tries i got into download mode. i don't want to **** up now so i won't do anything until i know exactly what to do.
any advice?
edit3:
got it working by flashing another teenybin which included trwp - then i installed miui via sideload. i don't have signal though, but i will open another thread for this since this is another issue.

[Q] Help, in serious problem with my phone after trying to install Cyanogenmod

So today for the first time tried to mess around with my phone, but i failed miserably. I rooted my phone with Kingo ROOT, and then followed the instructions on the wiki page, but at step 4 things got messed up, my phone got stuck at the SONY logo with the blue light turned on and it wouldnt do anything, so i removed the battery, now it boots up at the cyanogen recovery but i cant do anything from there , everytime i close the device when i boot it , it boots to this menu. I have tried everything to get it back to normal but nothing seems to work. I will tell exactly what i did in order to reach in this state. I downloade the nicki nightly cm, and moved the boot.img to my platform-tools folder in which i run on command prompt the following commands :
fastboot flash boot boot.img
fastboot reboot
After that my phone gets stuck and i can only access Cyanogen Recovery, does anyone have any idea what to do?? :crying: :crying:
Have you tried flashing the rom using cyanogen recovery?

How to fix blocked boot recovery samsung?

Hello guys,
A few months ago, I rooted my phone using kingroot. After a few weeks, i tried to install TWRP custom recover to unlock bootloader. I accidently downloaded a wrong version of it and flashed it using flashify app, after which i booted into recovery to check the new recover mode. But, something awkward happened. THE BOOT MODE DIDN'T OPEN AND THE SCREEN GOT STUCK AT "Booting into recovery". I read on the internet and realised that my device has got soft-bricked. Also, phone wasn't rebooting. So, i found a solution atleast start my phone. I took out my battery, pressed the buttons for download mode and then placed the battery back in and pressed the buttons for download mode and somewhow rebooted my phone (i read about this technique in xda forums). Now, although my phone works but i cannot access the recovery mode as it has got soft-bricked. Thus, i cannot perform a hard reset as it gets caught in that "recovery booting stuck cycle". So, can anyone tell me how to fix this? PLS QUICKLY. aLSO, i don't know much about ADB, so pls explain that too as my friend suggested me to use ADB to fix softbrick but im not sure!!
:crying:

Bricked and Undetected!!!

So I recently bought the Korean LG G3 (F400) and the first thing I did was rooting it, which was a breeze. Of course to root it I needed to install the LG Mobile Drivers, which I did and were working completely fine. Then I decided to take a little risk and attempt to flash CWM recovery (I did not know that I need to unlock the bootloader first or BUMP! the device) and well, flashed it the same way I flash stuff on my previous Samsung phones.
So now, when I try to boot the phone, I get the LG Logo and goes through with the boot animation, but after a little less than a second the boot animation fails and I get a black screen + the LED flashing blue and green and the phone remains like that. I tried factory reset but after I click yes it shows the LG logo then goes into a black screen (without the boot animation) + LED flashing blue and red.
So I tried finally going into download mode and attempting to return it to stock via LG Flash Tools, and like I said before the drivers were installed, but when I connect the phone to the PC it gives the message "Drivers were not successfully installed" and the LG Flash Tools fails to detect the phone. I checked within Device Manager and it says the LGE MTP device "cannot start".
So I'm pretty much stuck with a phone that doesn't boot, can't flash anything via adb or flash tools and no recovery installed. Can anyone suggest anything I can do to get this beast back up?
Try using this method http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359

Soft Brick from bad cable?

So earlier today I plugged in my charger into the phone, and it gave me an error messaging saying something about the cable being damaged, and System UI crashed. I unplugged it and made a mental note to buy another charger.
The device was having some issues with SystemUI properly rebooting, so I restarted the phone and got caught into a boot loop.
The device will not go past the HTC splash screen, just rebooting every few seconds.
It doesn't reboot when I go into the white screen bootloader, nor does ADB or fastboot oem detect it.
If I select download or recovery mode, one of two things happens:
1) It displays the monochromatic HTC logo for a few seconds and then reboots back into the normal bootloop.
2) It stays in the monochromatic HTC logo without doing anything else.
ADB does not work in any state, nor does trying to flash an RUU.
I've tried sticking an RUU with an SD Card and going into download mode, but nothing happens.
The device was running Leedroid at the time.
The bootloader is unlocked, and it is S-ON. It is a T-Mobile device with the Marshmallow Firmware installed.
I would very much appreciate help for this as I've been searching for solutions the entire afternoon.
I don't quite understand how a faulty cable would cause a bootloop but not completely fry the device.
Thanks.
Lohboh said:
So earlier today I plugged in my charger into the phone, and it gave me an error messaging saying something about the cable being damaged, and System UI crashed. I unplugged it and made a mental note to buy another charger.
The device was having some issues with SystemUI properly rebooting, so I restarted the phone and got caught into a boot loop.
The device will not go past the HTC splash screen, just rebooting every few seconds.
It doesn't reboot when I go into the white screen bootloader, nor does ADB or fastboot oem detect it.
If I select download or recovery mode, one of two things happens:
1) It displays the monochromatic HTC logo for a few seconds and then reboots back into the normal bootloop.
2) It stays in the monochromatic HTC logo without doing anything else.
ADB does not work in any state, nor does trying to flash an RUU.
I've tried sticking an RUU with an SD Card and going into download mode, but nothing happens.
The device was running Leedroid at the time.
The bootloader is unlocked, and it is S-ON. It is a T-Mobile device with the Marshmallow Firmware installed.
I would very much appreciate help for this as I've been searching for solutions the entire afternoon.
I don't quite understand how a faulty cable would cause a bootloop but not completely fry the device.
Thanks.
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So you can't even get to download mode by holding power+vol down for several seconds?
Tarima said:
So you can't even get to download mode by holding power+vol down for several seconds?
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Click to collapse
No, it just brings up the same issue of it getting stuck on the monochrome HTC logo.
no idea as i've never had this happen, but when i've had issues in the past i'd let the battery drain completely, then charge it a little, then try booting to download mode. maybe you could try that? did you have twrp or any custom recovery installed?
ffuser1 said:
no idea as i've never had this happen, but when i've had issues in the past i'd let the battery drain completely, then charge it a little, then try booting to download mode. maybe you could try that? did you have twrp or any custom recovery installed?
Click to expand...
Click to collapse
I've tried that, and I have the latest TWRP.

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