[Q] L9 769 Boot Screen Security Error - LG Optimus L9 P760, P765, P768, P769

Hi All,
After a failed attempt to root my L9 769, I have an issue where when the phone is turned on, it does not boot, it goes to a screen with the LG logo and the words "security error" beneath it. The phone then powers off. The only thing I have access to on the phone is this screen and the software update mode. I used the offline flash method in my root attempt. I am sure I screwed up in the process. I have scoured the internet in an attempt to resolve this, but I have yet been able to. This seems to be a fairly common problem when a root attempt fails, however I cannot correct this.
Things I have tried:
Fastboot: I try to run fastboot, but it stops at waiting for device.
Offline flash: I tried the offline flash method, but the tool freezes at 15% saying the device cannot be found.
Online flash: The tool recognizes the phone but sees it as being up to date. I try to use the recovery option but it locks up at analyzing the phone.
I am at a loss. Any help would be greatly appreciated.
Thanks,
J

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jlj012 said:
Hi All,
After a failed attempt to root my L9 769, I have an issue where when the phone is turned on, it does not boot, it goes to a screen with the LG logo and the words "security error" beneath it. The phone then powers off. The only thing I have access to on the phone is this screen and the software update mode. I used the offline flash method in my root attempt. I am sure I screwed up in the process. I have scoured the internet in an attempt to resolve this, but I have yet been able to. This seems to be a fairly common problem when a root attempt fails, however I cannot correct this.
Things I have tried:
Fastboot: I try to run fastboot, but it stops at waiting for device.
Offline flash: I tried the offline flash method, but the tool freezes at 15% saying the device cannot be found.
Online flash: The tool recognizes the phone but sees it as being up to date. I try to use the recovery option but it locks up at analyzing the phone.
I am at a loss. Any help would be greatly appreciated.
Thanks,
J
Click to expand...
Click to collapse
About offline flash I had the same problem that it couldn't connect to my device but when I used another computer it could find it.

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jlj012 said:
Hi All,
After a failed attempt to root my L9 769, I have an issue where when the phone is turned on, it does not boot, it goes to a screen with the LG logo and the words "security error" beneath it. The phone then powers off. The only thing I have access to on the phone is this screen and the software update mode. I used the offline flash method in my root attempt. I am sure I screwed up in the process. I have scoured the internet in an attempt to resolve this, but I have yet been able to. This seems to be a fairly common problem when a root attempt fails, however I cannot correct this.
Things I have tried:
Fastboot: I try to run fastboot, but it stops at waiting for device.
Offline flash: I tried the offline flash method, but the tool freezes at 15% saying the device cannot be found.
Online flash: The tool recognizes the phone but sees it as being up to date. I try to use the recovery option but it locks up at analyzing the phone.
I am at a loss. Any help would be greatly appreciated.
Thanks,
J
Click to expand...
Click to collapse
You need a recovery.img from p769 and flash it through fastboot
Download https://mega.co.nz/#!7RxjnDyS!gYY7Zs6naT4fa3Oj1FfIFu2O_sfEtL1awPD-HOSOu_E
Then type in fastboot "fastboot flash recovery p4_769.img"
Sent from my LG-P769 using Tapatalk 4

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I have the same issue adb won't connect no fastboot
Sent from my Amazon Kindle Fire using xda app-developers app

---

You need to flash the ice cream x & u boot for your device (in fastboot) to get the offline flash running again.
Some help on how to install fastboot
Did you install the omap4430 driver twice?
Open an elevated command prompt and type
Code:
SET DEVMGR_SHOW_NONPRESENT_DEVICES=1
devmgmt.msc
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Then open the Device Manager and see if you have the omap4 driver installed twice (in two locations)
Note: In Device Manager click the View tab and select Show hidden devices
If you don't see the omap driver installed twice, do this
Select the "other devices" and start deleting/uninstalling all of the devices you find here (I think the device you are looking for is "lg u2" but not 100% sure)
Once you have uninstalled all of the unknown drivers you found, run the start.bat again and follow the directions to flash the x & u img's (for your device).
Now go back to device manager and find the new unknown/other device created (should be lg u2) and install the omap4430 like you did the first time.
After you have done all this, rerun the start.bat and hopefully it will work for you.
Another thing, If you do see the omap driver installed twice, then it has to be your timing when you enter the battery. Keep trying different times to enter the battery
example. wait 1 second and enter battery, if that doesn't work wait 2 seconds then enter battery and etc.
Good luck

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No luck yet with connecting to fastboot, I will give this a shot and report back. Thank you.

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You were absolutely right, the issue was with having multiple drivers. I followed your steps and restored my phone to life. Thank you so much.
jlj012 said:
No luck yet with connecting to fastboot, I will give this a shot and report back. Thank you.
Click to expand...
Click to collapse

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Your are welcome, now hit the thanks button, it makes me feel good, Lol.
CM 10.1 P769

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kuma82 said:
Your are welcome, now hit the thanks button, it makes me feel good, Lol.
CM 10.1 P769
Click to expand...
Click to collapse
Lol..
Sent from my LG-P769 using Tapatalk 4

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Got fastboot working, but now what?
kuma82 said:
You need to flash the ice cream x & u boot for your device (in fastboot) to get the offline flash running again
Click to expand...
Click to collapse
@kuma82,
Before I start, I had NO IDEA how crazy the L9 was! I've rooted/unlocked/custom recoveried/custom ROMed 4 other phones without any major set backs prior to hitting this wall.
Also, this is my daughter's phone and I'm really took a lot of precautions before starting.
Here is what I did prior to attempting to wipe (factory reset) and install CM 10.1 (here):
Device model: P769
[was] rooted
CWM Recovery [was] installed
Stock JB (T-Mobile US) ROM backed up (full nandroid)
I was concerned about the many submodels of the L9 and verified both in the about phone within the ROM settings as well as what's printed/etched below the battery under the back cover. Both checked out to be P769.
I ran `adb reboot recovery` and then proceeded to wipe/factory rest from within CWM recovery. After this, I installed the ROM zip from the external sdcard. It failed the update script's assert of ro.product.id and would not install. OK, bummer, I'll just restore the nandroid backup. Nope. It was unable to restore /system and so now I really got concerned. I then found the weirdest thing of all. After seeing what is asserted in the update script for the ROM zip, I ran getprop for each of the properties it checks for and got back the Prada 3D "p940"!
Well now I felt like I was in a world of pain, so I decided to hack the update script so that "p940" would be accepted. Well now the install went fine without any errors reported. I proceeded to flash the latest gapps for 4.2.2 and it too installed fine. GREAT! Now for the system boot.........
From that point on, I've been stuck in LG Security Error land
I was able to get the special fastboot to connect (after many failed attempts) by selecting option 5 for ICS x & u flashing.
Could someone be please be kind enough to help me get my daughter's phone back to some ROM? I'm alright with even stock right now. At least then she'll have a functioning phone and I could even extract apps to restore from the CWM nandroid I made via Titanium.
peace.

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erraggy said:
@kuma82,
Before I start, I had NO IDEA how crazy the L9 was! I've rooted/unlocked/custom recoveried/custom ROMed 4 other phones without any major set backs prior to hitting this wall.
Also, this is my daughter's phone and I'm really took a lot of precautions before starting.
Here is what I did prior to attempting to wipe (factory reset) and install CM 10.1 (here):
Device model: P769
[was] rooted
CWM Recovery [was] installed
Stock JB (T-Mobile US) ROM backed up (full nandroid)
I was concerned about the many submodels of the L9 and verified both in the about phone within the ROM settings as well as what's printed/etched below the battery under the back cover. Both checked out to be P769.
I ran `adb reboot recovery` and then proceeded to wipe/factory rest from within CWM recovery. After this, I installed the ROM zip from the external sdcard. It failed the update script's assert of ro.product.id and would not install. OK, bummer, I'll just restore the nandroid backup. Nope. It was unable to restore /system and so now I really got concerned. I then found the weirdest thing of all. After seeing what is asserted in the update script for the ROM zip, I ran getprop for each of the properties it checks for and got back the Prada 3D "p940"!
Well now I felt like I was in a world of pain, so I decided to hack the update script so that "p940" would be accepted. Well now the install went fine without any errors reported. I proceeded to flash the latest gapps for 4.2.2 and it too installed fine. GREAT! Now for the system boot.........
From that point on, I've been stuck in LG Security Error land
I was able to get the special fastboot to connect (after many failed attempts) by selecting option 5 for ICS x & u flashing.
Could someone be please be kind enough to help me get my daughter's phone back to some ROM? I'm alright with even stock right now. At least then she'll have a functioning phone and I could even extract apps to restore from the CWM nandroid I made via Titanium.
peace.
Click to expand...
Click to collapse
To install custom rom or CM10 you need to unlock bootloader first. You should follow kuma82 in his post above to flash back stock rom.

---

The security error is because you didn't unlock it (sorry to hear that). Just flash with fastboot ice x & u for p769. Then put your phone in s/w upgrade and run the offline flash.
If you need anymore help, holla! I don't want your daughter mad at you

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kuma82 said:
The security error is because you didn't unlock it (sorry to hear that). Just flash with fastboot ice x & u for p769. Then put your phone in s/w upgrade and run the offline flash.
If you need anymore help, holla! I don't want your daughter mad at you
Click to expand...
Click to collapse
I swear I read every link you posted above and still could not figure out what: "flash with ice x & u" is. I downloaded the fastboot zip and ran start.bat and selected option 5 for ICS x & u for p769 and that got me an inverted LG fastboot screen. I was also able to then choose option 1 for fastboot which dropped me into an empty yours directory.
It was midnight and I had at least 8 browser tabs open to various xda posts, but I still couldn't figure out what I needed to do with the start.bat next.
Thanks in advance. My weekend is dedicated to solely fixing her phone
Sent from my HTC Sensation using Tapatalk 4

---

jlj012 said:
Hi All,
After a failed attempt to root my L9 769, I have an issue where when the phone is turned on, it does not boot, it goes to a screen with the LG logo and the words "security error" beneath it. The phone then powers off. The only thing I have access to on the phone is this screen and the software update mode. I used the offline flash method in my root attempt. I am sure I screwed up in the process. I have scoured the internet in an attempt to resolve this, but I have yet been able to. This seems to be a fairly common problem when a root attempt fails, however I cannot correct this.
Things I have tried:
Fastboot: I try to run fastboot, but it stops at waiting for device.
Offline flash: I tried the offline flash method, but the tool freezes at 15% saying the device cannot be found.
Online flash: The tool recognizes the phone but sees it as being up to date. I try to use the recovery option but it locks up at analyzing the phone.
I am at a loss. Any help would be greatly appreciated.
Thanks,
J
Click to expand...
Click to collapse
I've been wanting to try this: go to your computer and check your device manager and disable the LG drivers then try the offline flash again. Kuma way works but it's very long, found this while I was reading but never tried for our phones. Same problem though as updating stops at 15 %
Sent from my LG-P769(v20f) using the xda-developers app. Hit the thanks bottom, makes me feel good!

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erraggy said:
I swear I read every link you posted above and still could not figure out what: "flash with ice x & u" is. I downloaded the fastboot zip and ran start.bat and selected option 5 for ICS x & u for p769 and that got me an inverted LG fastboot screen. I was also able to then choose option 1 for fastboot which dropped me into an empty yours directory.
It was midnight and I had at least 8 browser tabs open to various xda posts, but I still couldn't figure out what I needed to do with the start.bat next.
Thanks in advance. My weekend is dedicated to solely fixing her phone
Sent from my HTC Sensation using Tapa talk 4
Click to expand...
Click to collapse
More help with fastboot
http://forum.xda-developers.com/showpost.php?p=44578108&postcount=34
http://forum.xda-developers.com/showpost.php?p=44653501&postcount=55
Another thing, more than likely, after you flash with the r&d tool you will need to do a hard reset because you flashed cyanogen. Also, you will still need to root to fix the touch screen.
CM 10.1 P769
Sent from my LG-P769 using xda app-developers app

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kuma82 said:
More help with fastboot
http://forum.xda-developers.com/showpost.php?p=44578108&postcount=34
http://forum.xda-developers.com/showpost.php?p=44653501&postcount=55
CM 10.1 P769
Sent from my LG-P769 using xda app-developers app
Click to expand...
Click to collapse
Yeah, I was able to repeatedly get the inverted LG fastboot screen and see everything you saw in device manager as well as successfully get `fastboot devices` to show (echo) the device. I even tried `fastboot flash recovery p4_769.img` with the file linked in post #3 and it flashed without error.
Here's my problem: What do I need to do now that I have a working way to run fastboot commands? Is there a recovery image I need to flash (stock)? Is there a boot image I need to flash? Or, is there some other fastboot command I need to run?
I'm assuming the advice you're giving me is to ultimately get a stock ROM back on her phone. Is that correct?
I'd really like to unlock the bootloader so that I can do what I know with CWM: backup, wipe, restore, flash, etc... If that is something I can do from where I'm at now, I'd prefer to put the effort in to that. If this darned 'Security Error' splash message must be resolved by getting back to a stock ROM first, then I'm game.
Final request for clarification: Am I still needing to "flash the ice cream x & u boot for your device (in fastboot) to get the offline flash running again"? If so, could you please provide instructions for that step? So far all of the steps linked here have been to get Windows drivers sorted out and fastboot working. I've got that now.
Thanks again!

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erraggy said:
Yeah, I was able to repeatedly get the inverted LG fastboot screen and see everything you saw in device manager as well as successfully get `fastboot devices` to show (echo) the device. I even tried `fastboot flash recovery p4_769.img` with the file linked in post #3 and it flashed without error.
Here's my problem: What do I need to do now that I have a working way to run fastboot commands? Is there a recovery image I need to flash (stock)? Is there a boot image I need to flash? Or, is there some other fastboot command I need to run?
I'm assuming the advice you're giving me is to ultimately get a stock ROM back on her phone. Is that correct?
I'd really like to unlock the bootloader so that I can do what I know with CWM: backup, wipe, restore, flash, etc... If that is something I can do from where I'm at now, I'd prefer to put the effort in to that. If this darned 'Security Error' splash message must be resolved by getting back to a stock ROM first, then I'm game.
Final request for clarification: Am I still needing to "flash the ice cream x & u boot for your device (in fastboot) to get the offline flash running again"? If so, could you please provide instructions for that step? So far all of the steps linked here have been to get Windows drivers sorted out and fastboot working. I've got that now.
Thanks again!
Click to expand...
Click to collapse
Okay, did you get all your info about unlocking the bootloader from carloswii5 video? So you had flashed 20b kdz right?
You gave me a hand full Lola, but I'm help you out. It get is going to take me some time to give you a guide, but I'll give you everything you need today and yes, you need to get back to stock.
I'll send you another link on how to use fast boot manually. Plus it has the images for ice cream. But hold up
Sent from my LG-P769 using xda app-developers app

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kuma82 said:
Okay, did you get all your info about unlocking the bootloader from carloswii5 video? So you had flashed 20b kdz right?
You gave me a hand full Lola, but I'm help you out. It get is going to take me some time to give you a guide, but I'll give you everything you need today and yes, you need to get back to stock.
I'll send you another link on how to use fast boot manually. Plus it has the images for ice cream. But hold up
Sent from my LG-P769 using xda app-developers app
Click to expand...
Click to collapse
THANKS!
Her phone had the stock TMOUS jelly bean ROM that we received OTA. I had only rooted her phone previous to my CM10.1 fiasco attempt.
So I've never flashed anything (successfully at least) on her phone. All of my previous android experience has been on 3 nexuses (One, S, 4) and my current HTC Sensation. That means I've only unlocked one bootloader that didn't support the fastboot oem method
I'm an experienced dev with the entire weekend to "play" with my daughter's p769
I also promise to provide lengthy posts in the Optimus L9 forums to help any future people from soft bricking any more devices.
Sent from my HTC Sensation using Tapatalk 4

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This will tell you how to use fastboot manually http://forum.xda-developers.com/showpost.php?p=43642515&postcount=21
The system image is to big to flash with fastboot, sucks.
1. Use the above to get back on stock (you need 10g kdz).
To enter s/w upgrade remove battery. Hold volume up and enter USB cable, then put the battery back in.
Sent from my LG-P769 using xda app-developers app

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kuma82 said:
This will tell you how to use fastboot manually http://forum.xda-developers.com/showpost.php?p=43642515&postcount=21
The system image is to big to flash with fastboot, sucks.
1. Use the above to get back on stock (you need 10g kdz).
To enter s/w upgrade remove battery. Hold volume up and enter USB cable, then put the battery back in.
Sent from my LG-P769 using xda app-developers app
Click to expand...
Click to collapse
UH OH... The "volume up" method isn't working on this device. I posted more details about it here. I'm beginning to think I may need to return the phone. I never thought flashing a ROM zip in CWM recovery could brick the phone. When I restoring the CWM backup also failed (when I at least was in CWM recovery which now is inaccessible), I freaked.
P.S. - I'm all out of thanks for the day. I think you got the lion's share though