Hello everyone,
I've searched everywhere I can think of to figure out how to solve my problem, and I assume the answer is hiding in an obscure part of an earlier thread on these fora. I was able to root my L9 P760 running Android 4.1(Jelly Bean) and from there naively assumed I could flash the recovery using ClockworkMod. After rebooting I've been getting the infamous "Security Error" screen. I've been able to get the "S/W Upgrade" screen, but that's as far as I got. I believe this means the bootloader is locked.
I followed a lot of instructions I found including using fastboot via omap4boot(http://forum.xda-developers.com/showthread.php?t=2119090) and the offline kdz flash(http://forum.xda-developers.com/showthread.php?t=2085344), but without luck. Fastboot would cause the phone to reboot, losing the "S/W Upgrade" screen and the kdz method would stall at 4%, leading me to find out that the phone needs to be in the "LG Update" USB mode, which I can't achieve because it won't boot.
I have two Macs running OS X 10.7 which can dual-boot into Windows 7. All software is up to date. I have experience using the command-line.
I hope there's a solution to this, and I hope that posting this here can help others avoid this problem in future.
Thanks in advance,
Pieter
Edit: I finally managed to flash a stock version of recovery, the x-loader and u-boot for Jelly Bean using the fastboot script from here. For those in a similar situation, I set the driver for the OMAP4xxx device which goes under TI devices(or something like that) and then I had to set the driver for a device called LG P4(or something, I didn't take a screenshot). I was then able to use the stock LG Mobile Support Tool, via the "Recovery Phone" option, to restore the newest version. However, it still won't boot properly. I get the LG logo when turning it on, and then the animation with the LG logo with the shiny effect on the smiley face keeps running in a loop. Is this the boot loop problem I've seen people asking about? How do I access recovery(and would that accomplish anything)? Any help would be appreciated.
Edit 2: I think I fixed it! I'm just documenting what I did to be helpful to other people. I had tried to do a hard reset earlier, but it didn't work. I tried it just now, and it worked, I got an droid with a progress bar underneath. Then it booted, and I heard the startup sound which I didn't know I was missing. I would still like to know in detail what I did wrong, and what I did right, and why it was right. Thanks in advance.
Simple, you probably did nothing wrong. Things just happen. I had this happen to me once. Security Error
However, I didn't install a custom rom or recovery img. All I did was flash a different kdz version (for my device). So my guess is that the boot img or other img, got corrupted.
I fixed my issue by flashing x, u, boot, recovery all in fastboot. Then I ran the flash update program again and it worked
Sent from my LGMS769 using xda app-developers app
dont know how to unbrick my lg [NEED ANYONE'S HELP :'( ]
hi,im new here...i have softbricked my lg l9 p768e last week. and i found this thread. i want to try using this method, but always stuck when launching B2Capp.exe. it appeared and gone like nothing happened. by the way, i cant get into CWM through my phone. somebody help me!!! i dont know what to do now...
sorry for broken english.
faizin.alfateh said:
hi,im new here...i have softbricked my lg l9 p768e last week. and i found this thread. i want to try using this method, but always stuck when launching B2Capp.exe. it appeared and gone like nothing happened. by the way, i cant get into CWM through my phone. somebody help me!!! i dont know what to do now...
sorry for broken english.
Click to expand...
Click to collapse
How do you brick your phone. Did you try to hard reset it? Did you try offline flash or LG mobile support tool to recover your phone?
Related
Hi everyone! As stated in the title my phone(p769) wont boot completely, I was in the middle of doing the bootloader unlock when I accidecntly replaced the bin during the root process of it with the wrong bin. Instead of replacing it with the v6 tmobile usa one I used the v5 canadian one. Now when I boot my phone up the lg screen is there and then eventually it just hits an android with a red exclamation point. I've tried Re-flashing while its in s/w upgrade mode with the flasher set to emergency, and Ive tried pressing the home button + vol down + power to no avail(it goes through the process but the same thing happens)
Any help at all would be greatly appreciated and many thanks in advance!
Edit: Also when I try to reflash, it just says it cant communicate with my phone. Ive uninstalled and reinstalled the drivers several times but seeing as how I cant acutally get into the phone Im not sure what else to do.
Edit 2: So ive been trying do something witht his for the past three hours and I cant get anywhere with it. I cant get the phone to show up as an adb device while its in s/w upgrade mode, and at the red exclamation point screenit shows up but as recovery and the lg tools fail to communicate with it. I would really appreciate if anyone knew how to deal with this.
Just in case anyone stumbles upon this and has the same issue I would like to say that i finally got mine fixed.
It has been a long day of frustrations but I finally got it there with the help of some awesome tutorials.
In order to fix it I had to fastboot my phone and flash the default loader and boot then my device would show up in my adb devices and I could sucessfully flash and root it.
hufger said:
Just in case anyone stumbles upon this and has the same issue I would like to say that i finally got mine fixed.
It has been a long day of frustrations but I finally got it there with the help of some awesome tutorials.
In order to fix it I had to fastboot my phone and flash the default loader and boot then my device would show up in my adb devices and I could sucessfully flash and root it.
Click to expand...
Click to collapse
how you resolve it?
saman_z1384 said:
how you resolve it?
Click to expand...
Click to collapse
I followed the fastboot tutorial and searched around in the help forum for people with similar issues and found a post where lelus posted both of the files I needed to flash with fastboot, from there I just put my phone in s/w upgrade mode and followed Lelus guide for root/flash
Dear all,
and thanks in advance to anyone willing to spend some time to help me.
It all started few days ago when I turned off my LG L9 (updated to the last version available for my brand (Italy - TIM), I believe it was Jelly Bean V20C).
When I turned on the phone again, it was stuck on the lg logo.
Then I started to read this forum, and the first thing I tried was the HARD RESET. After that, a sadly image of the android robot with a red triangle lying upon its body appeared.
This image now shows up every time I boot my phone, just after the LG logo.
Then I tried:
- recovery from LG Mobile Support Tool
- followed this guide: [GUIDE] [UNBRICK][ROOT] FLASH Any LG Factory ROM (kdz) WITH OFFLINE FIX
- tried KDZ update tool alone (3GQCT in combination with all modes: DIAG, EMERGENCY, CS_EMERGENCY).
In order to use the Offline fix guide, I run fastboot with option number 2, to upload ICS x-loader and u-boot, otherwise the phone was not recognized by the tool (_IsConnectedPhone(0)).
But in all cases of kdz update, the phone reboots at exactly 90% of the process and after the initial LG logo the red triangle is back again .
Harder reset won't work either after the update.
I tried Italian firmware V10A_00, V10B_00, V10C_00, V20C_00, but none of them works.
I noticed that after the update to an ICS firmware, when I try the hard reset procedure, I can see the android recovery image just one frame before the red triangle appears.
I also tried to install a CWM recovery, but without the bootloader unlocked I got a "security error", that went away with a kdz update.
I searched this forum and I think I can't unlock the bootloader with a bricked phone, am I right?
I plan to make a last recovery with the LG Mobile Support Tool and send it to warranty, so that no trace of fastboot manipulations should be visible (right?).
I have read a lot of threads on this forum (and others) before posting here.
If you know of anything I can try, please let me know.
Thank you!
Absolutely the same...
I have this problem, too. Did you find how to fix it?
What happens during the recovery with the LG tool? I am sure I read about stopping at 90% and a solution somewhere here... search for it, I dont have the time, sorry...
Sent from my LG-P760 using xda app-developers app
i have the same issue .
at 90% phone reboots and red triangle dead android appears .
i think its a problem with the drivers . tried this on win 8.1 , 7 and xp on 2 different computers . same results .
i got the same with lg recovery and offline kdz method .
would be very nice to find a fix
I brought the phone to the warranty office. They substituted the "pcb main" so I believe it was an hardware problem.
Hello,
I got the same problem. Using the same methods and got no positive results.
Does someone solve this?
hello my friends. have any of you solved this problem?
i did exactly what op did, and no results.
I never had a red triangle issue. This probably neans that the bootloader is kocked AND encrypted. In the beginning this was the case with the US T-Mobile variant, and seemingly for all L9s from the final oroduction run. For other phones you needed to flash a certain stock rom, v10a or the first couple of v20s, then unlock the bootloader.
You should try using the CSE Flash mode from LG Flash Tool 2014.
I have the same problem, the difference is when i try to flash kdz it gives me error at 50%. I tried all the methods that op does but no succes. I also tried flashing img's manually from fastboot, i tried cwm and twrp as recovery.img and even extracted original kdz to img's and flash every partition manually. The system.img is the main problem cause you can't flash such huge file (1gb) through fastboot. Maybe someone have some idea is there any way to unbrick my phone? Bootloader is locked, and device had no root before brick.
Hey everyone,
I know there are countless threads on this but I've been up all night going through pages and pages of info and trying virtually everything that each post said to no avail, so I thought I'd just make a new thread and see if anyone can help me.
Okay, so, I had a rooted L9, with locked bootloader, on stock JB before I started any of this. Yesterday, I decided that I wanted to put Cyanogenmod 11 on it, yet, I have only managed to soft brick it.
Basically, it's stuck at the Security Error screen. I can get it into the S/W upgrade mode, however, when I do that and open the LG support tool the program just crashes. The Windows "not responding" error pops up, and the program closes. I have no idea why this is happening now, because the program was working fine before, but anyways, yeah. I have the shttps thing running in the background, and the connection is successful. I tried doing the offline fix countless times, but no luck. I have the UpTestEX_mod2_marwin.exe file, too, that I've been trying to use, however, as you all know, it just opens the lg program when you click on "upgrade start" and the program crashes. I tried doing the software upgrade through the exe file, but it doesn't find the port. Device Manager tells me the L9 is on port 9, but it looks on port 1 or 0, and doesn't find the L9.
I think that's basically it, and, if anyone can help me at all it would be very much appreciated (I don't really want to have to buy a new phone!)
If it is a security error than I think it would be easier to fix it from omap4boot mode with unofficial fastboot. Its a thread in this forum.
Sent from my Amazon Tate using Tapatalk
I probably just did something, that is supposed to be impossible. I bricked my LG L9...
I had 20f soft with root and tried to unlock bootloader using some method, that is about flashing KDZ files of V10 and V20 roms using offline mode of LG Support Tool.Well it looks like something is not right. After the whole process, the device rebooted aaaand stuck on the second LG logo, I thought it was fine, just need to hard reset but no. Now, when i try to hard reset i get the "dead android"with the red sign, and every rom i'm trying to flash using this offline support tool gets only to 50% and then says, that the device is no longer connected (?????). I tried to get back to stock rom using support tool recovery but same here. 50% and nothing more. Today, i've bought 910k cable, heard that may help but i'm not sure how to use it.
If anyone is able to help, i would be very grateful. And sorry for all spelling mistakes.
Arsen258 said:
I probably just did something, that is supposed to be impossible. I bricked my LG L9...
I had 20f soft with root and tried to unlock bootloader using some method, that is about flashing KDZ files of V10 and V20 roms using offline mode of LG Support Tool.Well it looks like something is not right. After the whole process, the device rebooted aaaand stuck on the second LG logo, I thought it was fine, just need to hard reset but no. Now, when i try to hard reset i get the "dead android"with the red sign, and every rom i'm trying to flash using this offline support tool gets only to 50% and then says, that the device is no longer connected (?????). I tried to get back to stock rom using support tool recovery but same here. 50% and nothing more. Today, i've bought 910k cable, heard that may help but i'm not sure how to use it.
If anyone is able to help, i would be very grateful. And sorry for all spelling mistakes.
Click to expand...
Click to collapse
did you try fastboot method? that pretty much will get you unbricked
Hello everyone, I have been a fan of your forums for quite a while, you guys have an awesome community. I have been attempting to unbrick my VS990 with no success, I have LGUP and all of the proper dll files in the proper folders, I have two .kdz. One is the stock kdz, I can not get to work at all due to anti roll back (no matter which option I choose) and the other is the current kdz. I got that one to accept using update, but it did not fix my phone, it is still stuck in boot loop. and using refurbish I get an error message saying that it is not supported by that kdz. LG UP is fully recognizing my phone, I found the .kdz files no problem, I believe that I have followed all of the steps here >> https://forum.xda-developers.com/lg-v10/general/guide-lg-v10-stock-firmware-to-stock-t3224170 any help at all would be appreciated. Side note, I have not rooted or installed a custom recovery.
I would also like to add, I can not do a hard reset. Every time I attempt the phone either locks up when I hit the power key on yes to confirm factory reset, or sometimes it reboots to LG splash screen and locks up then. I am starting to wonder if there isnt a hardware problem with the phone instead of software.