Can't install rom on LG G3 6.0 Mashmellow - G3 Q&A, Help & Troubleshooting

Hi everyone! First i'd like to apologize for any english mistakes, since i'm brazillian! Here's the thing... Recently, i`ve updated my LG G3 with a 6.0 Marshmallow rom (from lg-roms website), and after some tests, i've decided to go back to 5.0 Lollipop. But here's the problem: when i tried to load the new room via lg flash tool, i get some errors, saying that my phone is not connected (just when i'm in the download mode). When i try to flash with the phone on, the lg flash tool recognizes him, begins the installation and reboots the fone to the download mode, but when the download mode initializes, the software shows the same message (that he is not connected). Also, i`ve tried to root the phone with kingroot (a bunch of versions) and i never get succesful. Can anyone help me with a solution so i can go back to 5.0?

Thank you gustavorossy for your post,
Same problem here. In addition, to make the phone recognize the pluged usb, I have to :
1- turn it off
2- plug the usb cable
3- turn it on with the cable pluged
Otherwise, if I turn it on without the cable pluged, or if it reboots during utilization, the phone don't detect the charger nor the PC or any other connection, till I follow the steps above. So it makes it impossible to go stock for exemple.
Except it, everything is working well and I tried to install various custom ROMs none of them fixed the problem.
Thanks a lot for any help.

Related

[Q] Messed up my E975... need help... :(

Hello all, on a stock E975 I installed freegee and then cwm, unlocked the bootloader and installed fastboot (i think, there's the start menu if I hold vol+ and power).
The phone shows 'google' and an open lock at the boot also.
Now, I messed up the OS of the phone and t the moment it 'only' boots to cyanogenmod 10.2.0, wifi and Bluetooth aren't working and IMEI reports all zeroes if without SIM, 'unknown' if SIM is inserted.
I know his is a big trouble since I haven't freegee backup anymore but I'd like for the moment to return to stock firmware. Onestep at a time.
So, I need help in how to install stock firmware since the various methods I've tryed so far aren't working.
I got the right E97510H_00.kdz file downloaded ith the Original LG firmware program but I am unable to flash it anymore using KDZ_FW_UPD.exe: I start with phone in upload mode but the program reboots the phone, fastboot menu comes up and firmware update cannot continue anymore and exits with an error.
What should I do to let KDZ_FW_UPD continue with updating firmware?
SOLVED!
Just made a 910k type cable, connected phone to PC and set lg updater to Emergency mode.
Stock firmware restored perfectly and IMEI is working again too.
also...
when the phone reboots to fastboot while trying to flash kdz, power off phone, dont close/exit kdz updater, disconnect usb cable, switch to download mode again and the flashing should finish. i always had success with this one. hth!
Sent from my LG Optimus G using xda app-developers app

Bootloop after Xposed install, Hard Reset not working

Hi there,
i rooted my G3 using Towelroot and all worked fine.
Today i installed the actual Version Xposed Framework and after rebooting it entered a Bootloop.
So i tried to Hard Reset my G3 but when i confirm it the Android with the Gaers show up for a second and then my G3 keeps showing the LG Logo for a few Minutes till i disassamble the Battery.
Next step i try is to flash a firmware in Download mode, but i cant get the Drivers to work... =(
Someone have some hints for me?
patrickn2282 said:
Hi there,
i rooted my G3 using Towelroot and all worked fine.
Today i installed the actual Version Xposed Framework and after rebooting it entered a Bootloop.
So i tried to Hard Reset my G3 but when i confirm it the Android with the Gaers show up for a second and then my G3 keeps showing the LG Logo for a few Minutes till i disassamble the Battery.
Next step i try is to flash a firmware in Download mode, but i cant get the Drivers to work... =(
Someone have some hints for me?
Click to expand...
Click to collapse
Have you choosen ART modality?
If i would say "what the hell is that" ... would u slap me?
No.. i dont have chosen that..
Bigger problem is that i dont get any usb driver working for firmware update in Download mode.. =(
OK... i managed to get the drivers working.
But further Problem ist now that im not able to flash anything on my device...
Neither the TOT Method, nor updating with the Original LG Support Tool is working...
Support Tool tells me my Model Number and that my Version is most actual.
If i update anyway it stucks at 4% and tell me it cant connect.
TOT Tool tells me that my Version Number is not correct... but it is..
With the KDZ Update Tool it stucks at 4% like the Original method.
Same problem here
Any one can help us?
Solution
Hi there,
the Problem was my PC...
I was on a Windows 8.1 64bit.
Switched to a Win7-PC and all is working fine.
You should try to use the Original LG cable, or another "Original" Cable and connect it to a USB-Port on the Back of your PC (directly to the Mainboard)
On a blank Win 7:
- I installed the LG PC Suite
- Updated the PC Suite
- Connected my LG in Download Mode
- Let the PC install all drivers,
- Disconnected the Phone
- Downloaded the actual LG Mobile Support Tool
- Let the Support tool do the work
After this i got my first OTA Update and its working like a charme

LG G3 D855 Wont boot in Download mode.

Hi im new to XDA Developers Forum, i just tried this Solution( http://forum.xda-developers.com/lg-g3/help/help-secure-boot-error-trying-to-boot-t3054977 ) and my LG G3 D855. Is in the same state as from User "DonnieDoezoe"
"Totally bricked my phone with these instructions Won't turn on anymore. Tried everything...only shows a trinagle if I connect to usb without battery."
Before i tried this. I had already rooted the LG G3 D855, and after these instructions i tried to reboot into recoveryTWRP( wich i flashed with flashify) i tried to reboot with Quick Boot (Reboot ).
After this my Phone doesnt work anymore and is just like in the state of a blacksreen( the phone is visible as LGE AndroidNet USB Serial Port(COM41), the only thing that shows is a triangle if I connect to usb without battery.
I searched for solutions the whole day and tried to unbrick it with the LGFlashTool by flashing the .tot file and .dll, but wont work because i cant enter to the Download mode.
I Hope some one gives me hint in the right direction on how to fix this problem, would much appreciate it.
www.androidbrick.com , solution for all unbricks
( i will e-mail to you )

[HELP] Cannot root my G3/D855

Hey guys, just want to root my LG G3 (never rooted before) these day but failed for many ways. But computer said the MTP is not working while I entered download mode (code 10 error). I have tried a lot of way to solve the problem but still not success. Mine is in 5.0 with software version V21A. Someone told me V21A is unable to root. Is there any solution to it? Wanna downgrade back to kitkat cuz 5.0 drains battery in really a short period of time.
Hi, be sure to install the right mtp drivers for your phone. Do a quick web search on that. Also, disable any antivirus on your phone and make sure that you use the right usb cable. Some usb cables are not designed for data transfer - just for charging. The stock cable should work.

LG G3 Cat.6 Bootloop and unknown device in Download Mode

Hi guys,
Please bear with me as I'm new to this scene.
My LG G3 Cat.6 (F460L) is currently stuck in bootloop, can't enter recovery mode as well but it can go through download mode but my PC won't recognize it (tried different usb cables and tried it on another PC, still no luck). I made an error when I was trying to flash twrp into recovery but accidentally flashed it to boot (I was quite unsure about what I did but I think I flashed a wrong version of twrp for recovery and tried to reflash the right version but accidentally flashed it to boot, if that made sense). I was able to get into the factory wipe screen and after pressing yes it goes right into bootloop again. Was also able to get into another screen with turn on, turn off and cancel options but I'm not sure what it does because it's all in korean. My PC can't recognize my device right before this happened so I think that explains why it also can't recognize it while in download mode. I saw something about Qualcomm stuff but I'm unsure as to how it is done (the shortpin part) and i don't think my PC would even recognize it as it can't even recognize my device in the first place (faulty micro usb port I guess). Any fix that you guys can think of? Thank you very much!

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