Develop Bugs

[Q] Need help to fix my bricked LG G3

hello geeks,
I really need serious help. First the setup I have is as follows
1. I have LG G3 D855 but its european or Hong Kong or Taiwan version I don't know. I bought it in India. I updated it to android 5.0 Lollipop. Everything is fine till now.
2. Then I rooted my phone. This step was also fine. No problem.
3. Then I tried to download camera mod v2.0 to get some extra camera features like 60fps. In this step I got problems. I downloaded the media_profile.xml and copied it to /system/etc. But I made a mistake that I did not change its permission and rebooted the phone.
I am troubleshooting from a windows 8.1 PC. I downloaded the LG USB driver.
Due to this my phone stop at initial LG,Life is Good Screen. I tried different methods in internet.
1. I tired to access the device file file through adb. But the adb does not list the device.
2. I tried to use fastboot mode, but still fastboot does not list device when in the boot screen.
3. I pressed down pwr + volume down button and release after screen come up and then press again. I was asked to erase user data. I said yes and it erased the data. But still the same symptom when I reboot. Stuck at initial screen.
4. I tried to use LG PC Suite. But it does not even detect phone through the USB and there is no repair button.
5. I tried to enter downloading mode. This one is strange. I pressed down the vol up and then connected USB. But sometimes only it enters downloading mode and sometimes not. May be once in 10 times it enters downloading mode and 9 times it goes to initial boot LG screen.
I am not sure whats going on. Can anybody help me to figure it out ? Please help.

Thats because your not doing it properly
Research a guide on how to enter download mode and after that you can use flashtool to wipe your system and reinstall the original lg firmware

[HELP] - Soft Bricked G3 D852 (Rogers) - No Download Mode. Stuck at FW Update Screen

Hello all,
I've done a lot of googling and searching on these forums and I'm having no luck. Hopefully by asking I can get some headway.
I was attempting to restore to stock rom. At 17% of the process using LGFlashTool 1.8.6 the tool gave me an error 'Unable to Communicate with phone' after about 10 minutes of no progress. I exited the LGFlashTool program and ran it again and now it fails saying 'Cant' change to download mode". If I turn the phone off and then press Vol+ and plug in my cable it just goes to the Firmware Update screen. My phone *IS* detected properly in the device manager as LGE Andriod MTP Device and under ports as LGE Mobile USB Serial Port (COM41). If I go into recovery (Vol- and power) it asks if I want to do the restore - but it doesn't actually do anything once I say yes twice. Just sits at the firmware update screen at 0%.
I looked at this post (http://forum.xda-developers.com/lg-g3/general/unbrick-lg-g3-qhsusbbulk-qualcomm-9008-t3072091) but it appears to be either for a different phone or different problem (showing in device manager as a bulk device - mine is not doing that). Frankly I don't want to make things worse (if that's possible)
Does anyone have a way that I can restore the download mode for this D852 phone? I'm hoping if I can get download mode to work again I can reflash the stock rom. I don't care about the data on the phone at this point.
I'm willing to send some $$$ via paypal to whomever can get me back up and running! Thanks

Valgore said:
Hello all,
I've done a lot of googling and searching on these forums and I'm having no luck. Hopefully by asking I can get some headway.
I was attempting to restore to stock rom. At 17% of the process using LGFlashTool 1.8.6 the tool gave me an error 'Unable to Communicate with phone' after about 10 minutes of no progress. I exited the LGFlashTool program and ran it again and now it fails saying 'Cant' change to download mode". If I turn the phone off and then press Vol+ and plug in my cable it just goes to the Firmware Update screen. My phone *IS* detected properly in the device manager as LGE Andriod MTP Device and under ports as LGE Mobile USB Serial Port (COM41). If I go into recovery (Vol- and power) it asks if I want to do the restore - but it doesn't actually do anything once I say yes twice. Just sits at the firmware update screen at 0%.
I looked at this post (http://forum.xda-developers.com/lg-g3/general/unbrick-lg-g3-qhsusbbulk-qualcomm-9008-t3072091) but it appears to be either for a different phone or different problem (showing in device manager as a bulk device - mine is not doing that). Frankly I don't want to make things worse (if that's possible)
Does anyone have a way that I can restore the download mode for this D852 phone? I'm hoping if I can get download mode to work again I can reflash the stock rom. I don't care about the data on the phone at this point.
I'm willing to send some $$$ via paypal to whomever can get me back up and running! Thanks
Click to expand...
Click to collapse
What happens when u just power up the phone ?

Thanks for the reply.
If I shut the phone down (by pulling battery) then plug it back in and just power it on, I get the LG logo then it goes to the firmware update screen with 'USER B84" in the box below the progress bar. Progress bar never moves. I get to this screen whether I start it in recovery (which is just the factory recov - looks like during the initial 17% it wiped out my TWRP), attempt to start it in download mode (I do not get the download mode screen with the blue dots anymore), or regularly by just holding the power button.

ok
Dont plug it into the computer and try to power it up what does ot do?

Same thing.

read this
http://forum.xda-developers.com/lg-g3/help/lg-g3-bricked-tried-everything-experts-t2852962 this might help

pacods61 said:
http://forum.xda-developers.com/lg-g3/help/lg-g3-bricked-tried-everything-experts-t2852962 this might help
Click to expand...
Click to collapse
Ok that didn't work for me but I did try the LGFlashTool using Board DL instead of Upgrade DL and it was moving a bit. Finally got to 10% and failed at 574 sec with the error "We can't communicate with Phone". I am using the cable that came with the phone. It isn't damaged or anything.
Here's what is shows in the LG Flashtool window (this is port 1 (com41)
Code:
PID: BS09S150309001007
IMEI: <myimei>
Model: D852
DLL: D852
BIN: <correct bin file from stock roms>
SWV: LGD852AT-01-V20C-302-720-FEB-04-(cuts off here can't read rest)
SWOV: LGD852AT-00-V20C-RGS-CA-FEB-04(cuts off here can't read rest)
Initializing
USB Connection Established
Start Download
LAF: Bin_User_Mode
PRIMARYGPT
MODEM
LAF:Bin_User_Mode
PRIMARYGPT
LAF:Bin_User_Mode
PRIMARYGPT
MODEM
[14: 7:28) We can't communicate with phone
00000064
On the phone it shows COM41 under the usb icon on under firmware update and 0% progress. In the box below it says:
Code:
F USER 50.0 A50.0 B70 UHS
S U LG-D852 04.4.2 Hrev_10
D85210b
D85210b
That's it. Should I leave the phone connected at this point or unplug it? Device still shown in device manager (have had it up beside the LG Flashtool window the whole time. I do see it refresh from time to time but the contents dont' seem to change at all.

Ok so I left this over night and when I checked the phone this morning it's different but I don't think it's good.
Looks like it proceeded but ended with:
FBOOT Check
FBOOT Complete Time [0s ] 1th try
Factory Reset Flag = 2
Factory Reset Flag Check Fail!!!
And my phone has a blue screen with Factory Reset Status and a big red '2'
Now what do I do?

Some further information.
If I run the LGFlashTool in Board DL action mode, it seems like the process works but I end up with the red 2 on the screen. But I don't get 'can't change to download mode' or 'cannot communicate with phone' errors.
However if I choose Upgrade DL action mode, then I get 'can't change to download mode' or cannot communicate with phone'. ARGH. What gives?
I have tried things like fresh restarts (restarting PC), restarting the LG FlashTool between attempts, not restarting flashtool, etc. I can't seem to find the sweet spot.

here
http://forum.xda-developers.com/sprint-lg-g3/help/fix-bricked-lg-g3-ls990-stuck-fastboot-t3084562 another tutorial to try

Thanks, but no dice.
I don't get fastboot options, and if i download and attempt to use fastboot, it shows no devices.
Also, when following the steps for the BOARD DL option in the lg flashtool, it goes through the process but I get no ATT screen. Nor do I get the option to tap OK or Normal - as soon as my device reboots after the flash, it gives me a MINI OS (iirc) screen with a bunch of vertical bars below it moving up and down then it changes to the Factory Reset screen with the number 2.

last one lol
http://androidforums.com/threads/ho...-2-lg-g3-d855-twn-32-gb-problem-fixed.911271/ i found one more that could help it said to use a jdz not a tot hope it helps if not sry

Thanks - I'm going to give this a try, however I can't finda .kdz file for my phone (canada/rogers D852 LG G3) - the links in that post that link to firmware is for a tot file. Does anyone have a link to the KDZ?

Hi, I'm having the exact same problem now, where the phone only boots to the Firmware Update screen. Did you manage to fix it?

Indeed.
I used the KDZ method pacods61 posted last, but I had trouble actually finding kdz firmware. With some help I finally managed to do so from here: http://devtester.ro/projects/lg-firmwares/country.php?country=Canada
Direct link for D852 Rogers Lolipop 5.0.1: http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FWF448V332CPAKX8CEA4UCE/D85220g_00_1205.kdz

LG G3 in download mode not detected by Windows

Dear xda-developers-community,
I'm trying to get a phone of a friend of mine working which just reboots whenever the phone is started. The resulting boot loop can only be interrupted by taking the battery out or wait until it is depleeted.
In order to fix this soft-brick I first tried to use recovery by pressing VOL - & POWER. In the menu, I could select and confirm to recover to factory settings, but after some seconds the boot loop appeared again with (seemingly?) no change having been made. The error kept appeaing over and over again.
After trying recovery mode, I attempted to start the phone in download mode by pressing VOL + on the (switched off) phone and connecting a USB cable. The respective menu also opened, here, showing "Firmware Update" and "Do not unplug the USB connection until the process is complete". According to many tutorials I found on the internet, when having installed the required drivers (I used LG United Mobile drivers from here), this procedure should allow you to flash a recovery image through LG's flashing tool (which one can also find on that page).
However, when I connect the LG G3 (D855) to a computer the driver is installed on, there is no new device shown in the Device manager. I tried this out with Windows 10 x64 and Windows 7 x64 and disabled driver validation on both systems and enabled test signing on Windows 10, respectively. Additionally, I followed these instructions, but in this case the screen stays dark and the device is not detected either. It seems like there are not so many people experiencing this error, but I hope we can find a solution.

nVentis said:
Dear xda-developers-community,
I'm trying to get a phone of a friend of mine working which just reboots whenever the phone is started. The resulting boot loop can only be interrupted by taking the battery out or wait until it is depleeted.
Click to expand...
Click to collapse
This may sound like a dumb question, but have you tried a new battery yet? If it is one of the original batteries it could have gone bad & started bootlooping...like mine did a few months ago.
As far as the PC not recognizing the phone you can try downloading USBDeview and uninstall anything that has the vendor ID's of 1004 & 18d1(pretty much anything that says android or LGE in the description) & reboot the PC. Hopefully it'll recognize your device and install the drivers the next time you plug it in. If it doesn't find the drivers automatically for you then install LG drivers manually.
Link for usbdeview: http://www.nirsoft.net/utils/usb_devices_view.html
Link for LGE drivers: http://www.lg.com/us/support/software-firmware-drivers
Good luck :fingers-crossed:

Sort of bricked G4, rebooting download mode, no fastboot recognition nor TWRP

Hi all,
I have tried my luck in two different threads already and did hours of research but thus far, no success. I hope somebody can help me.
I installed the official Nougat (V29A) update and after that the Oreo AOSCP ROM. Everything went (seemingly) fine, Oreo was working. I wanted to reflash Oreo to get rid of some Google Apps, but the problem then was, that I could not reboot into TWRP. The only recovery mode is the Android recovery and I cannot reset the phone, neither use ADB sideload, nor do anything else (unknown fs_filetype error). Only thing that is working, is to enter the fastboot mode, but my laptop does not recognize the phone while in fastboot mode.
I also tried resetting the phone to factory defaults from within Android (back when it was still booting up) and now my phone is stuck in a bootloop which ends in the (useless) Android recovery mode.
At first I thought reflashing the stock kdz would not be a problem. I am able to enter download mode, but it only stays in download mode for about 15 seconds and then reboots itself. LGUP or LG flash tool, don't recognize my phone in that short amount of time.
I tried the above mentioned solutions on OS X, Windows 7, Windows 10 as well as FWUL. No system recognizes my phone.
I really am at my wit's end. Any help would be appreciated.
If any further information are needed, I am happy to provide these.

I changed following in hidden menu NT Code, changed as below NT Codes with respect to firmware region... Rebooted after confirmation "NT Code Write OK" message.
V29a Firmware NT Code:
"1","FFF,FFF,FFFFFFFF,FFFFFFFF,11"
V20h Firmware NT Code:
"1","FFF,FFF,FFFFFFFF,FFFFFFFF,51"
Checked in both above firmwares..Worked flawlessly on my h818p...No more annoying message on every boot.
Software Version in about/ settings also changed to region exp. 20h-DS2-XX to 20h-ESA-XX upon reboot.
Is DS2 appears when cust mismatch..?

Bootloader/Recovery problems...

Hi!
I recently bought an LG G4 from an online seller. The cell phone itself is working fine, but it has some problems. It is a refurbished model.
I will very much appreciate any help.
The cell phone is actually a F500L model (I checked it by looking at the motherboard), but in the software information it shows to be a model H81510h.
The phone is not rooted. But I believe that someone did it, changed the device's descriptions and then uninstalled it.
It is an android 5.1, but I cannot update using the update center. There it shows that it is already in the latest version.
In the developer settings, I try to enable OEM unlock, it activates for 1 second and deactivates automatically.
I try to do the hard reset, but when restarting to start the process, it presents an error "Secure booting error 1002".
I can activate USB debugging, it is recognized in ADB tools and I can send commands to it. But it does not start the bootloader with the command "adb reboot bootloader", and it presents the same error "Secure booting error 1002" if I try to send the command "adb reboot recovery".
I can activate the Download mode (by pressing the VOL UP button and inserting the USB cable), but it is not recognized by LGup (UNKNOW / COM5 H81510h), LGup does not let me work with it.
In the LG Flash Tool, it does not start the flash process, when it reaches "BIN CRC Check" it presents the error "Failed PreviousLoad0". (I already changed the port to COM41)
In LG Bridge, it is recognized as F500L and shows that there is an update. But when trying to update, it does the first steps, but after the download, when installing it gives an error and asks to start over.
I have tried to use UPPERCUT_1.0.0.0, without success.
I do not know what else to do...
Any help will be appreciated.