[Q] Security Error on boot - LG Optimus L9 P760, P765, P768, P769

Hi,
I am using LG p765 (rooted).
I wanted to install CWM touch .img so to do that I installed app called "Rashr - Flash Tool". After booting it in recovery mode using this app I got "Security Error" with LG logo. Please Suggest Steps

try sw upgrade mode and recovery through the lg tool

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Problem Restoring LG L9 760

Hallo i have a Problem while Restoring my L9 .
I installed Cyanogenmod 10.1 but now i wanted to use stock rom again. So i Used the Recovery Mode of The LG Update tool. At 90% of the recovery Process my LG closes the usb connection to the PC. After that i had a Bootloop of the LG Logo. Now Nothing instead of getting The Phone to S/w -Mode works.After this i tried to get cwm on the phone to install cyanogenmod or something else again but CWM was erased by the recovery mode. All tries to get the phone into fastboot dont work ( there is no LG logo that loades and fastboot dont accept the phone. Can you please help me resolving this problem and get my phone to work again.
Benihipe said:
Hallo i have a Problem while Restoring my L9 .
I installed Cyanogenmod 10.1 but now i wanted to use stock rom again. So i Used the Recovery Mode of The LG Update tool. At 90% of the recovery Process my LG closes the usb connection to the PC. After that i had a Bootloop of the LG Logo. Now Nothing instead of getting The Phone to S/w -Mode works.After this i tried to get cwm on the phone to install cyanogenmod or something else again but CWM was erased by the recovery mode. All tries to get the phone into fastboot dont work ( there is no LG logo that loades and fastboot dont accept the phone. Can you please help me resolving this problem and get my phone to work again.
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What about the offline flashing method? Using a kdz file?
Sent from my LG-P760 using xda app-developers app
I did it I unbricked it with this method :
http://forum.xda-developers.com/showthread.php?t=2119090
So i got it to fastboot and then I flashed CWM with it to my Phone after that i flashed a custom rom via cwm --> Working
Now theres only one question remaining. How can i get a stock rom to the phone if this LG tool dont wirk is there a version for cwm and p760 out ?

LG D321 help pls

My lg d321 is showing me
Boot certification verify
Secure booting error!
Cause: boot certification verify
I use lg flash tool 2014 I install the driver everything but during the flashing process it stops at 4% while flash KDZ firmware
Please help me am using window 8
You could probably use LGNPST, I used it for my bricked E970. Google it and download it, then boot into download mode and flash stock firmware. Let me know if this helps. I can provide a detailed procedure if you'd like

Bricked LG P970 :( ... Please help.

Hi,
I have bricked my LG p970 phone. It does not boot neither does it enter S/W upgrade mode (Up Vol + usb connection).
Below are the things I did which bricked the phone:
1. Flashed the phone using custom recovery, which caused the phone to boot with security error.
2. Flashed using V10 firmware and smartflash tools. Android 2.2.2 was installed on the phone and it worked perfectly.
3. I wanted Android 4.0 so I again flashed the phone with V30 firmware using smartflash tools.
4. "Download Completed" was displayed on the smartflash tool.
5. I disconnected the USB cable and since then the phone does not boot. Does not even enter S/W upgrade mode.
Can anyone help please?

[Help] Stuck at Boot loop, can somebody help me?

I have an LG-D618
It all started when I edited the build.prop file of my phone and now I'm stuck at LG Logo non-stopping, and after the first Boot Screen, the others Boot Screen's don't even finish completely the "LG" Boot animation
I had my phone rooted, running Kit Kat, I can only enter the Download Mode, I tried to Flash to Stock Rom with "LG Flash Tool 2014", a KDZ file and "LGMobile Support Tool" but when i try to install the Rom, the LG Mobile Support Tool tells me "My pc is disconnected from my phone".
I don't have a Custom Recovery installed on my phone
I'm kinda new in this, Can someone help me please? :crying: :crying:
Any suggestions? I'd would really appreciate that! Thanks Anyway!
You may not installed LG USB driver&modem correctly and then software do not recognize phone.
http://www.lg.com/ph/support/support-mobile/lg-D618
Install driver and lg mobile support from page above.

LG E440 fails every try to fix security error

Hey, my LG E440 shows a security error everytime I want to start it. I already tried to flash the stock firmware with LG Mobile Tool, LG Flash Tool and KDZ Updater. Mobile Tool and Flash Tool are showing me an error at 5%. KDZ updater fails with "Phone not found" error.
Im able to boot into download mode while connecting it to the USB cable. Without I cant get into download or recovery mode.
Can anyone help me? Im running out of ideas what to do.

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