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help lg optimus 4x brick, apx

hello friends, I need urgent help to repair my lg optimus 4x, so i was updating with lg mobile support tool and gave me an error, now only the pc recognizes it as apx device, is the only sign of life it presents, not light does not come in sw or anything. i was reading as desbrickear optimus 2x, http://forum.xda-developers.com/showthread.php?t=1007825 but not if this tutorial works with optimus 4x, please help ...

adnlopez83 said:
hello friends, I need urgent help to repair my lg optimus 4x, so i was updating with lg mobile support tool and gave me an error, now only the pc recognizes it as apx device, is the only sign of life it presents, not light does not come in sw or anything. i was reading as desbrickear optimus 2x, http://forum.xda-developers.com/showthread.php?t=1007825 but not if this tutorial works with optimus 4x, please help ...
Click to expand...
Click to collapse
helpII

Id send the device back into lg, is it unlocked? defaulting to apx say to me you have a missing/ corrupt bootloader and without access to nvflash (thanks again LG...) and if is we cant fix it.

You probably got into apx mode by holding both volume buttons while rebooting.
If the phone isn't corrupt you should be able to get out of apx mode by connecting the usb to the phone while holding vol-
You better try several times, eventually you should be able to enter in sw mode.
I don't know if the method you posted will work because of the apx drivers, someone was working on them for the 04x but i think the thread wasn't updated in a while

JoinTheRealms said:
Id send the device back into lg, is it unlocked? defaulting to apx say to me you have a missing/ corrupt bootloader and without access to nvflash (thanks again LG...) and if is we cant fix it.
Click to expand...
Click to collapse
friend I have not solved anything. I still can not solve. the phone does not switch s / w ..

JoinTheRealms said:
Id send the device back into lg, is it unlocked? defaulting to apx say to me you have a missing/ corrupt bootloader and without access to nvflash (thanks again LG...) and if is we cant fix it.
Click to expand...
Click to collapse
I connect without battery to maintain volume - and nothing, I found a few apx drivers and now I get to adimistrador device drivers nvidea mobile device .... not now if an updated version of nvflash support O4HD tegra 3 for me.

adnlopez83 said:
I connect without battery to maintain volume - and nothing, I found a few apx drivers and now I get to adimistrador device drivers nvidea mobile device .... not now if an updated version of nvflash support O4HD tegra 3 for me.
Click to expand...
Click to collapse
Hey fella I have this problem too. The only way to solve is decrypt the Kdz file. So we can find the files to flash. My phone was dead for 5 months Already. Maybe we can help each other.
Sent from my GT-N7100 using xda premium

xavierleonelbr said:
Hey fella I have this problem too. The only way to solve is decrypt the Kdz file. So we can find the files to flash. My phone was dead for 5 months Already. Maybe we can help each other.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
hey friend! did you fix it?
I'm a bit new to android, I understand many things and not others, tell me how we can desifrar kdz. thanks ..

as they manage? or not you unbrick?

adnlopez83 said:
hey friend! did you fix it?
I'm a bit new to android, I understand many things and not others, tell me how we can desifrar kdz. thanks ..
Click to expand...
Click to collapse
you fixed it? did it or you did not unbrick?

No! My phone is dead. The only hope I believe - if we find a developer to discover how to decrypt the Kdz file for LG P880 Series for us.
Sent from my GT-N7100 using xda premium

ok! good friend then to pray for someone to help us!

Did NV flash recognized phone?
Sent from my LG-P880 using xda app-developers app

Do the s/w procedure with battery on all the time and flash a kdz
Sent from my LG-P880 using xda app-developers app
---------- Post added at 01:41 PM ---------- Previous post was at 01:29 PM ----------
With correct adb drivers plug it and open a msdos window and type... adb reboot bootloader
Sent from my LG-P880 using xda app-developers app

that drivers are correct?
run adb reboot-bootloader, an error: device not found
I have not unlocked the booloader, I think is that the error, I saw this thread: http://forum.xda-developers.com/showthread.php?t=2298420. please help.

any help??
any developer to who can help??

Any solution?
Did you find how to fix it?. I have the same issue after a failed upgrade using LG mobile support tool.
No SW upgrade mode, no screen or leds activity, no nothing. When is connected to PC, APX device is recognized. I found some drivers and the APX device is displayed now as "NVIDIA USB Boot-recovery driver for mobile devices". I'm stuck there. I was looking into NVflash utility but after the command "nvflash --sync" only get "unknow device found"
Can anybody help me please?.
How can I get into SW recovery mode or something that shows some activity from the phone?.
Thanks and regards

I have the same trouble with my device.
PC show only uknown APX Device.
I tried to install Universal Naked Driver 0.72 and 0.72. But PC says that drivers wrong.
jaob22, could You please sent me link to download, or zip file with drivers You used to APX device, on my email.

http://forum.xda-developers.com/showthread.php?t=2263822 go here and put this drivers from one they working good

help
help me friend. I have months with my lg optimus 4x harbrik not find any solution, tried to fix it with jtag and nothing. no lights, no sw enters, only to connect to the pc recognizes it as a device apx ..
iodak said:
Did NV flash recognized phone?
Sent from my LG-P880 using xda app-developers app
Click to expand...
Click to collapse

[Q] lg g flex ls995 stuck in bootloop help!!!!

so I had root access and a few apps no big deal, then I tried doing a wifi tether file path to enable it and not it wont boot im stuck at the lg logo I downloaded lg flash tool and all the necessary files and got that to the point where in the com1 box I says ready but it wont actually start the update. I can get into the bootloader and sideload is there anyway I can sideload the stock firmware back ? any other suggestions that would make this work

RODKNEE1231 said:
so I had root access and a few apps no big deal, then I tried doing a wifi tether file path to enable it and not it wont boot im stuck at the lg logo I downloaded lg flash tool and all the necessary files and got that to the point where in the com1 box I says ready but it wont actually start the update. I can get into the bootloader and sideload is there anyway I can sideload the stock firmware back ? any other suggestions that would make this work
Click to expand...
Click to collapse
Make sure u r on COM 41 (under Ports in device manager)

do u still have recovery

didithu said:
Make sure u r on COM 41 (under Ports in device manager)
Click to expand...
Click to collapse
This.
Right click your phone under device manager and change the port to com41 and it will start the process in LG Flash Tool.

dannejanne said:
This.
Right click your phone under device manager and change the port to com41 and it will start the process in LG Flash Tool.
Click to expand...
Click to collapse
Dude that was it!!!!!! YoU freakin rock!!!!!

(please help)hardbrick with usb debuging off

please help me anyone.my flex after install rom hardbricked.it boot only in download mode and now its unrooted.no recovery menu.but i cant back to stock with usb debuging off.not conecting with my phone in kdz installation.any solution any idea?my flex is really dead

tomtsigg said:
please help me anyone.my flex after install rom hardbricked.it boot only in download mode and now its unrooted.no recovery menu.but i cant back to stock with usb debuging off.not conecting with my phone in kdz installation.any solution any idea?my flex is really dead
Click to expand...
Click to collapse
Regardless if you have USB debugging on or off if you plug up to your PC in download mode you can use the LG PC SUITE software that comes on your phone, or download it from lg, to revive your phone.
You'll need your PC connected to the internet for this
Just put in download mode
Plug into PC
Open pc suite
At the top click mobile devices tab
In drop down click "restore upgrade error"
If it doesn't recognize your phone you will need your serial number and your device model number I.e D959, D950, D955, D958, etc.
Sit back and relax this takes about 10 mins
This is the only method I use now to restore my device. Works like a charm for me.

when the phone is softbricked and usb debugging is off you cant install all drivers my friend.and phone no connected with anything.thanks for your intresting

mattwheat said:
Regardless if you have USB debugging on or off if you plug up to your PC in download mode you can use the LG PC SUITE software that comes on your phone, or download it from lg, to revive your phone.
You'll need your PC connected to the internet for this
Just put in download mode
Plug into PC
Open pc suite
At the top click mobile devices tab
In drop down click "restore upgrade error"
If it doesn't recognize your phone you will need your serial number and your device model number I.e D959, D950, D955, D958, etc.
Sit back and relax this takes about 10 mins
This is the only method I use now to restore my device. Works like a charm for me.
Click to expand...
Click to collapse
KDZ is over 1.5GB. How it takes 10 minutes?
Sent from my LG G Flex F340K on LTE network, Stock KitKat 4.4.2 Rooted
using XDA mobile app

Once it downloads the kdz it only takes 10 mins.

mattwheat said:
Once it downloads the kdz it only takes 10 mins.
Click to expand...
Click to collapse
Is there an option in LG suite to manually place already downloaded KDZ in the specific folder.
So it wont downloading it..
Sent from my LG G Flex F340K on LTE network, Stock KitKat 4.4.2 Rooted
using XDA mobile app

When phone is hard bricked it wont boot. USB debug does work only when system is up and running.
Sent from my LG-D955 using XDA Free mobile app

Murshad007 said:
Is there an option in LG suite to manually place already downloaded KDZ in the specific folder.
So it wont downloading it..
Sent from my LG G Flex F340K on LTE network, Stock KitKat 4.4.2 Rooted
using XDA mobile app
Click to expand...
Click to collapse
Yes. There is a folder on your c:\program data\lg ....something or other folder. go into it and into mobile phone folder I think its called. I'm not in front of my PC right now. But you'll find the folder you need in there. Just put the stock .kdz file in there. It must be the same version or newer than you're on. Or was on when it bricked.
I've even actually pulled the .kdz files from there after I used PC suite the first couple of times. Used them in the lg flash tool.
---------- Post added at 10:47 PM ---------- Previous post was at 10:39 PM ----------
robdevil said:
When phone is hard bricked it wont boot. USB debug does work only when system is up and running.
Sent from my LG-D955 using XDA Free mobile app
Click to expand...
Click to collapse
I've noticed, by accident, when I did the factory reset method \ steps to get into twrp, but for some reason twrp wasn't installed and it actually reset my phone.... And caused it to boot loop due to what ever i did to FUBAR it. Factory reset defaults USB debugging back to off but when in download mode it didn't stop PC suite from "restoring upgrade errors" and flashing my flex back to stock. I've used it so much I now make sure my PC at work has it and the .kdz on it. My laptop has it and I have a flash drive in my truck with PC suite & .kdz on it. Lmao. Yeah I get a little ballsy sometimes and try just about anything. OK a lot but I always have a way back now.

my friend try this with pc suite and it stop in 0%.not run.and my interner connection is very good.why?

I have no clue. Try different usb cable if you don't have the one the one that came with it. I've noticed my flex and nexus 7 don't like some cheaper no name brand cables when transferring files or using adb. They seem to be fine with just charging. I use mostly my usb cable that came with my moto razr hd maxx. Only cuz it stays connected in the micro end better. And I have no clue what happened to the original.
Also make sure you have the latest LG drivers installed.
Sometimes to get the old "offline method" to work I would have to make sure no Samsung drivers were installed or Motorola drivers, Kies, or moto device manager. If any were I would have to uninstall them and the LG drivers. Restart Windows. And re install the latest LG drivers.
So not sure what exactly did the trick but I did all of it just to make sure and something helped. Try that. Don't plug in your flex till after LG drivers are installed and you have restarted Windows. I don't know but seems like what ever sequence or install or uninstall of drivers I've done now works all the time. Before we got bump I would go from 4.2.2 to 4.4.2 a couple times a week just to fool around a few days till something I modified or themed would bootloop me and I would get passed and go back to 4.2.2 and swear I'm not leaving JB till we have a custom recovery on KK. But my A.D.D. would get the better of me and I ,..... oh yeah I gotta run get some,.... oh never mind I'll .... huh oh yeah my A.D.D. it causing crack flashing syndrome. Lmao

I am on F340K Rooted Stock recovery Kitkat 4.4.2 V20D.
after changing my build.prop I forgot to set permissions.
Now I am unable to fix permissions through adb... although I succesfully Pushed the Original backup file from my PC..
I have two backups of Build.prop in my phone also.. One in system directory with the name of Build.prop.bak and 2nd is external sd card.
please advise me what to do?. I can access phone though Volume+Power = LG service Manaual (which is shown in ADB as Recovery device)
whereas Original Stock recovery Volume down+Power have an Android Logo with Red Triangle...
Is there a way I can install/ Push Some custome recovery Like Freedom Flex Bumped cwm or twrp to my phone? Fixing permissions through ADB Operation not Permitted or Permission denied error

Help, bricked phone due to flashing bootloader

Please help, I flashed a flashable bootloader and now my phone is bricked and it says secure booting error 1003 :crying:
http://forum.xda-developers.com/g4/development/rom-cyanogenmod-13-0-t3243588

MrCampust said:
Please help, I flashed a flashable bootloader and now my phone is bricked and it says secure booting error 1003 :crying:
http://forum.xda-developers.com/g4/development/rom-cyanogenmod-13-0-t3243588
Click to expand...
Click to collapse
Did you unlock your bootloader first using OEM unlock and fastboot before flashing the bootloader?
Try this,
Download the MM kdz file for your phone here,
http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Then follow the instructions EXACTLY on the following link and attempt flashing the kdz, install the DLL first then LGUP and follow the instructions to do a full wipe and install MM,
http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
After that, follow the instructions on the following link to unlock your bootloader.
http://forum.xda-developers.com/tmobile-g4/development/stock-h811-20i-images-kdz-flashable-t3308227

That doesn't work if it does I'd be delighted to know how
Secure boot error 1003 means you only have download mode to boot into
Likely lg up tool will either not see your device or it will say model unknown.
I've been sitting secure boot error bricked for a week with no explanation on fixing the Unknown device model issue with that tool.
Sent from my Nexus 5X using XDA Free mobile app

androidddaaron said:
That doesn't work if it does I'd be delighted to know how
Secure boot error 1003 means you only have download mode to boot into
Likely lg up tool will either not see your device or it will say model unknown.
I've been sitting secure boot error bricked for a week with no explanation on fixing the Unknown device model issue with that tool.
Sent from my Nexus 5X using XDA Free mobile app
Click to expand...
Click to collapse
Try uninstalling LG up, the DLL, and LG bridge from your computer. Reboot, and start over. You are entering download mode with LG UP correctly right? First, install DLL then LG UP. Turn off phone and with LG UP running, plug in usb cable to computer and into phone, remove battery from phone and put battery back in and the phone should enter download mode automatically. Follow the rest of the instructions in the LG UP thread to flash the kdz. You can flash the stock kdz with a locked bootloader. Your PC is the problem. If you manage to flash the kdz, be patient. It reboots several times. Don't unplug it during this process.

mattnin said:
Try uninstalling LG up, the DLL, and LG bridge from your computer. Reboot, and start over. You are entering download mode with LG UP correctly right? First, install DLL then LG UP. Turn off phone and with LG UP running, plug in usb cable to computer and into phone, remove battery from phone and put battery back in and the phone should enter download mode automatically. Follow the rest of the instructions in the LG UP thread to flash the kdz. You can flash the stock kdz with a locked bootloader. Your PC is the problem. If you manage to flash the kdz, be patient. It reboots several times. Don't unplug it during this process.
Click to expand...
Click to collapse
Trust me I wanna believe my PC is the issue I do
So much that I'm reformatting my PC Just to get it to work .
But I'm scared to think that relocking the boot loader screws up what PC driver settings were reading from the phone such as mtp mode.
So the question is how do you get a PC to recognize download mode with drivers does download mode Still REACH a signal across to the PC.
Are these a special set of lg drivers or Lg bridge drivers which are called Lg air driver update that bridge tool forces you to update too .
What makes you think also that This Unknown model is going to go away its already been stated that it remains because If you was on a ROM and not stock this occurs and no way around it .
I'm not saying lg up doesn't see my device it just sees it and detects model unknown so what I'm saying is the pc and Lg up tool is actually seeing the Lg g4 but just reading it as a Unknown model which then prompts you to choose correct model which you can't
Sent from my Nexus 5X using XDA Free mobile app

androidddaaron said:
That doesn't work if it does I'd be delighted to know how
Secure boot error 1003 means you only have download mode to boot into
Likely lg up tool will either not see your device or it will say model unknown.
I've been sitting secure boot error bricked for a week with no explanation on fixing the Unknown device model issue with that tool.
Sent from my Nexus 5X using XDA Free mobile app
Click to expand...
Click to collapse
I couldn't restore my phone with the KDZ so I went to T T-Mobile to replace the phone

MrCampust said:
I couldn't restore my phone with the KDZ so I went to T T-Mobile to replace the phone
Click to expand...
Click to collapse
I'm just throwing it away it's a headache at this point
I can't take it to T-Mobile cause its not on an account I got it on trade from a friend
And it is paid off but it would be a hassle with no account tied to it also Lg would hassle me for a warranty replacement likely wanting proof or seeing its bricked first then telling me I did it
Sent from my Nexus 5X using XDA Free mobile app

LG L90 D415 not detected when connect to PC.

When I plugged in my T-mobile LG L90 D415 into PC using USB cable, why didn't my PC detect anything? All it did is charging the device.
Already installed LG USB driver, PC Suite, and nothing is detected. There is no exclamation mark in PC device manager either.
In smartphone settings, all I see is Storage, no USB & Storage option like all other devices I owned before.
I reset the phone and start over and nothing changes.
Another thing is that the device always say there is a system update and already downloaded 82MB file, yet everytime I try to update the device, it always fails.
What gives?

mxnerd said:
When I plugged in my T-mobile LG L90 D415 into PC using USB cable, why didn't my PC detect anything? All it did is charging the device.
Already installed LG USB driver, PC Suite, and nothing is detected. There is no exclamation mark in PC device manager either.
In smartphone settings, all I see is Storage, no USB & Storage option like all other devices I owned before.
I reset the phone and start over and nothing changes.
Another thing is that the device always say there is a system update and already downloaded 82MB file, yet everytime I try to update the device, it always fails.
What gives?
Click to expand...
Click to collapse
Maybe try changing USB mode to mtp or ptp

0000.0000.00 said:
Maybe try changing USB mode to mtp or ptp
Click to expand...
Click to collapse
There is no such menu or options when I select Settings - Storage.

mxnerd said:
There is no such menu or options when I select Settings - Storage.
Click to expand...
Click to collapse
What ROM is this phone running?

0000.0000.00 said:
What ROM is this phone running?
Click to expand...
Click to collapse
T-Mobile stock ROM 5.0.2
Developers options enabled.
No difference.
==
Are there 2 types of USB cables?
One for charge only and the other "data & charge"?
How to tell the difference?
Got 2 cables and both can only charge the device.
Being swapping cables for my mom & dad's devices, but they are not with me now.

mxnerd said:
T-Mobile stock ROM 5.0.2
Developers options enabled.
No difference.
Click to expand...
Click to collapse
I think I'll send you a kdz for the d415 variant of an older version with stock KitKat. If you go into download mode and flash it offline with the instructions somewhere here on XDA. Just search for it. Then it should work. But first make sure your phone is detected in download mode.
---------- Post added at 12:59 AM ---------- Previous post was at 12:57 AM ----------
0000.0000.00 said:
I think I'll send you a kdz for the d415 variant of an older version with stock KitKat. If you go into download mode and flash it offline with the instructions somewhere here on XDA. Just search for it. Then it should work. But first make sure your phone is detected in download mode.
Click to expand...
Click to collapse
Also look for a lg USB driver download thing. This makes the USB act like a virtual USB CD drive to get the drivers and see if it works. If you can't find a setting to change the USB probably does not have data. But check with download mode.

Finally have time to test again and found that USB cable is the culprit. Don't know why I didn't discover that earlier.
Anyway, I managed to root the device after several tries (since the Kingroot that came with the system sucks and not compatible with many apps) and flash it with SlimROM 7.1.2 with Nano Gapps and it looks absolutely slim and beautiful!
Hope it works for me. Cheers!