Develop Bugs

[Q] LG G3 D855 [Secure booting error. Boot Certification Verify]

Hi bros
i tried to flash Android 5 20A to my LG G3 phone with LG Flash Tool. But then system crashed immediately. Right now I cant open phone in recovery mode, i cant use hard reset. I cant open download mode. And even computer cant see my phone with usb. On the top left corner, blue and red lights always lighting when i tried to open download mode.

same here

Hi I have just send it to lg assistance

Search for G3 unbrick here in xda or google. There's a few threads about how to "unblock" the phone.
I've done it twice already because of tests on it...

This thread is supposed to also work on the G3. Thought it might help:http://forum.xda-developers.com/showthread.php?p=50775936

akeldan said:
Hi bros
i tried to flash Android 5 20A to my LG G3 phone with LG Flash Tool. But then system crashed immediately. Right now I cant open phone in recovery mode, i cant use hard reset. I cant open download mode. And even computer cant see my phone with usb. On the top left corner, blue and red lights always lighting when i tried to open download mode.
Click to expand...
Click to collapse
I think phone of you unplug battery , Hold volue + inplug battery + and connect cable
If phone detect driver 9008 phone hardbrick
i can unbrick.

tungkick said:
I think phone of you unplug battery , Hold volue + inplug battery + and connect cable
If phone detect driver 9008 phone hardbrick
i can unbrick.
Click to expand...
Click to collapse
Hello my dear friend, I am having the same problem please help. Thank you. I got an email attachment.
[email protected]

Hi.
I had the same issue. All i did is do a hard reset on my phone by holding volume down and power button, when you see lg logo release the keys and press power button as fast as you can until you see hard reset.

can't enter download mode

Hi all
friend game me a phone with no os on it or something else
the condition is that i cannot enter even a download mode or recovery mode
and the computer doesn't recognize the phone
it shows the LG logo for about a half second and then shuts down or screen turns off
even than a connect it to adapter it shows battery stat for half second and shuts down
is there anything that i can do in this situation?
thanks for help

LG G3 Stuck in Factory Reset Status 2

Hello there,
Today my rom (Xenon HD) stopped working and i wanted to get my old stock rom back.
So i started to downgrade, but in the end i ended up in the Factory Reset Status 2 after it shows the boot animation of an os called "mini os".
Anybody got experience on this ?
Thanks
Baschdi

Factory Reset 2
Baschdi_ said:
Hello there,
Today my rom (Xenon HD) stopped working and i wanted to get my old stock rom back.
So i started to downgrade, but in the end i ended up in the Factory Reset Status 2 after it shows the boot animation of an os called "mini os".
Anybody got experience on this ?
Thanks
Baschdi
Click to expand...
Click to collapse
First remove your battery then insert battery dont power on mobile . holding the volume up, plug in a microUSB cable into your phone.
Make sure the USB side is already plugged into the computer
You should start to see "Download Mode" for a few seconds and then it will show "Firmware Update". You are now in Download Mode!
Open LG Flash Tool and Put your dll and tot files in and use Board DL (Very Important)
after u success
It should boot into MiniOS just hit ok. Push power button plus touch the screen where it says Normal boot+(power)
done

This is not working for me. it says waiting for connection, please help
i am frustrated !!!

likhil2k3 said:
This is not working for me. it says waiting for connection, please help
i am frustrated !!!
Click to expand...
Click to collapse
Try unplugging and plugging back in and ensure you are on PORT41 for the device driver. After you do that and in Download Mode, then unplug and replug USB.
Also do not use USB 3 and try another port if you still have issues.

Bhimani bhargav said:
First remove your battery then insert battery dont power on mobile . holding the volume up, plug in a microUSB cable into your phone.
Make sure the USB side is already plugged into the computer
You should start to see "Download Mode" for a few seconds and then it will show "Firmware Update". You are now in Download Mode!
Open LG Flash Tool and Put your dll and tot files in and use Board DL (Very Important)
after u success
It should boot into MiniOS just hit ok. Push power button plus touch the screen where it says Normal boot+(power)
done
Click to expand...
Click to collapse
I have same issue in my LG G3 D850 I have apply your procedure Thanks It works ... first time the setup screen completes but when i powered off mobile and insert the sim and then powered on its again going to miniOs again i Normal boot+(power) but now boot looping auto ... what can i do now ???

For me who had the same issue, I just rebooted the device back into download mode and the LG flashtool resumed automatically. (I did not close or stop the process from the LG flashtool when I got this message).
Once the process resumed automatically, I still got download fail.
I can see whenever the device reboots, the modem disappears from within device manager after getting to the "Factory Reset 2" screen.
Any advice?
Update: I tried about 7 times to get it flashed. I ended up just restarting the phone in normal mode and strangely voila it works perfectly. Even though the software said the flash failed, it still worked. Thanks anyway!

Bhimani bhargav said:
First remove your battery then insert battery dont power on mobile . holding the volume up, plug in a microUSB cable into your phone.
Make sure the USB side is already plugged into the computer
You should start to see "Download Mode" for a few seconds and then it will show "Firmware Update". You are now in Download Mode!
Open LG Flash Tool and Put your dll and tot files in and use Board DL (Very Important)
after u success
It should boot into MiniOS just hit ok. Push power button plus touch the screen where it says Normal boot+(power)
done
Click to expand...
Click to collapse
This worked. Tks a lot.

I just got a LG harmony and as i soon turned it on it went to factory reset status and I tried to bypass but it keeps taking me to Factory reset, I also tried the download mode which took me to firmware update for hours it has still been at 0%. Taking forever

Bhimani bhargav said:
Factory Reset 2
First remove your battery then insert battery dont power on mobile . holding the volume up, plug in a microUSB cable into your phone.
Make sure the USB side is already plugged into the computer
You should start to see "Download Mode" for a few seconds and then it will show "Firmware Update". You are now in Download Mode!
Open LG Flash Tool and Put your dll and tot files in and use Board DL (Very Important)
after u success
It should boot into MiniOS just hit ok. Push power button plus touch the screen where it says Normal boot+(power)
done
Click to expand...
Click to collapse
thank you very much ,it work succesful

Bricked my LGG3

Hello everyone,
so here's my problem:
Wednesday morning i took my phone out of my pocket and had a blackscreen. I tried to restart it and took out the batterie but i always got stuck in the LG Logo or a bootloop. Since i had TWRP and lineage OS installed, i tried to go into the twrp menu with the factory mode (power button + volume down) but after the "double yes" i always got a blackscreen.
So i went into the internet to fix it myself. I tried the "LG Flash Tool 2014" with the kdz. reset & the other Flash tool with the tot. reset. Both didnt recognize my phone. At this point, the only thing that worked was the download mode BUT not the recovery mode that usually comes after it. It just showed the download mode for some seconds and then a black screen. Later i noticed that my phone showed as a "qualcomm device" in the device manager, and the internet said that this was bad. So i used "Board diag" and "Smart boot diag" to fix it, but at the point where the device should have restarted, and the download mode should have worked WITH the recovery mode, i always ONLY had the 6 second download mode. After messing a bit with "Board Diag" i even got it to show up as LGE AndroidNet USB Serial Port in the device manager, which apparently was even more bad and only way to go back to qualcomm was to shorten the pins which i did. And it worked BUT now i was back with the qualcomm stuff.
So as you can see, i've prety much run i circles since wednesday... Iam now at a point where 3 different thingscan happen when I try to put my LG into download mode (volume up + usb cable):
1. Its recognized as a unknown device which is constantly connecting and diconnecting, so iam assuming my phone is bootlooping with a black screen.
2. The download mode icon shows on my phone and disappears after some seconds but my pc fails to recognize it.
3. Nothing happens and the screen stays black
When i only connect the usb cable, it shows a stuck charging icon for some seconds and then goes black. Connecting without a battery shows the "missing battery icon". I tried with 2 pc's, both having the LG mobile driver 4.2 and the qualcomm driver installed AND beeing in testmode. Both don't recognize the device. I also tried 2 batteries on my phone but it changes nothing.
I have a D855. And i know that my situation is pretty f*cked but maybe someone i able to help me anyway. Thanks alot.

Cannot Boot LG G3 Beat (D723TR) After Flashing

So when I try to install TWRP (for Lineago OS) I was getting the "fastboot_init" screen and wasn't able to pass it. After some research I found out that my software may be the issue, so to turn the normal state of my phone I flashed this kdz file with LG Flash Tool 2014 in Download Mode.
After that, I booted. I was able to hear the constant starting song with black screen right after I saw the LG logo. After restarting the phone, I'm only able to see charging info and a red light when I plug a usb.
Notes:
- I tried to force restart with Power + Volume Up combination.
- First photo is not mine (shows the same thing)

Problem solved. Try the keyword "soft bricked".
Note that you enter the download mode if you, unplug battery & USB and press Volume Up connect the usb that you attached it to a PC.