LG Security Error (UNBRICK) - LG Optimus L9 P760, P765, P768, P769

i have problem after flashing wrong recovery img to to lg p769 ,the phone stock with lg logo with Security Error.
i try to flash V20D_00.kdz with no luck.it was abig problem ,and i try alot of ways you name it ,and search the net with no luck .untill i see post wasn't clear .So i put it togther to be an eazy way to fix LG SECURITY ERROR
you need :
1-fastboot zip file for ( l9 p760 p765 p768 p769 )from here http://forum.xda-developers.com/showthread.php?p=41768774 thanks to Lelus
unzip it and move to C:/ direct
2- this script below and the ALL (3) img from here http://forum.xda-developers.com/showthread.php?p=43642515&highlight=lelus+batch+script#post43642515 thanks to kuma82
move the (3) img's to bin folder inside C:/fastboot/bin
fastboot devices
fastboot erase u-boot
fastboot erase boot
fastboot erase recovery
fastboot flash u-boot 2u-ice.img
fastboot flash boot 3boot-ice.img
fastboot flash recovery 4recovery-ice.img
3-KDZ_FW_UPD_EN.zip and shttps.zip (if you dont have them) from here http://forum.xda-developers.com/showthread.php?p=36351786 thanks to cmahendra
4- you KDZ or ROM from here http://forum.xda-developers.com/showthread.php?t=2107971
instuction
1- put you phone in fastboot mode ,follow this post http://forum.xda-developers.com/showpost.php?p=44578108&postcount=34 thanks to kuma82 for the images
2-Run cmd (run as administrator) and drag the bin foler to cmd directory OR type cd C:\fastboot\bin
3-copy and past the script in # 2 one at the time .then toen off the phone
4-hold the Volume UP and plug the USB to the phone to be in Software Upgrade Mode.
you can follow this post http://forum.xda-developers.com/showthread.php?p=36351786 thanks to cmahendra,
you should have you phone back unbricked
good luck

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I have been pulling my hair out for 3 days trying to un-soft brick my phone. Tried everything and kept getting stuck. Your write up and links to the other posts made everything super easy. First try today and I'm back up and running thanks to you. 20 thumbs up.

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The issue i am having is keeping the LG P2 or anything in device manager stable without it consantly reloading.
I did manage to get to S/W upgrading once (but didnt have the other steps installed/finished yet.) I think i did it by eventually doing step 5 (after all the step 1 stuff) on lelus fastboot.
Im hoping i cant just jump right off there (IF i can get it to get to s/w again) as im guessing all s/w upgrade screens are the same point.
Crossing my fingers that i can figure out how to make all this work! Stupide security lock

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It works!
Holy crap this works!
I retried everything fresh on another pc, everything worked on first try. Sorta, i mean i did kinda forget how to get into S/W upgrade mode, but i got there on the second try.
Anyways, 1000000 million thank yous for this write up! Now i just need to remember how to root this thing!

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@fox12345
Thanks for taking the time to provided some instructions. I've been meaning to do so but been busy with other stuff.
I don't like asking for thanks, but sometimes I do. If it's not much of a problem, hit the thanks button on my posts provided in your thread.
Sent from my LGMS769 using XDA Premium 4 mobile app

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Help
I am having the same problems. I did you method and the only change is now the "Security Error" is gone but phone still wont boot or enter recovery or S/W update mode. When this all started I had stock GB on it. I downloaded a version of JB V20F_00 that supposedly had an unlocked bootloader. I made it through root, installing CWM as TWRP wouldn't install, and flashed a version of CM 11 for it. When it rebooted it had the security error. I have completed your steps but now cannot enter recovery or S/W Upgrade mode. I have tried holding the Vol Up key and inserting the cable without the battery, holding the Vol Down and plugging it in sans battery, holding both Vol buttons and plugging it in sans battery, and all the same steps with the battery connected. No luck. Any help you could give would be much appreciated

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disinfectantrum said:
I am having the same problems. I did you method and the only change is now the "Security Error" is gone but phone still wont boot or enter recovery or S/W update mode. When this all started I had stock GB on it. I downloaded a version of JB V20F_00 that supposedly had an unlocked bootloader. I made it through root, installing CWM as TWRP wouldn't install, and flashed a version of CM 11 for it. When it rebooted it had the security error. I have completed your steps but now cannot enter recovery or S/W Upgrade mode. I have tried holding the Vol Up key and inserting the cable without the battery, holding the Vol Down and plugging it in sans battery, holding both Vol buttons and plugging it in sans battery, and all the same steps with the battery connected. No luck. Any help you could give would be much appreciated
Click to expand...
Click to collapse
If your phone appears dead, then something messed up with fastboot. Run fastboot again and flash an ice cream x & u (select the option for your device).
Sent from my LGMS769 using XDA Premium 4 mobile app

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kuma82 said:
If your phone appears dead, then something messed up with fastboot. Run fastboot again and flash an ice cream x & u (select the option for your device).
Sent from my LGMS769 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanks much for the reply. Im pretty sure it was actually a driver conflict of some sort as when I installed the same exact everything in another computer and reattempted to enter sw mode it worked perfectly. still got hung at 15% but closing all programs, running ccleaner, and rebooting allowed me to flash V20D_00. All is good now.

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you guys are amazing
wow...was just to give up on my l9 w/security error as a casualty of my compulsive need to jack around with my phones and I find this. I had rooted and tried to flash CWM when everything went wrong. I had been deep into cmahendra's thread but my phone was never recognized...I was missing the fastboot/flashing step. Once I flashed the .img files cmahendra's awesome method went off without a hitch.
OK so I feel like I can get it back to stock if I screw up so I'm gonna go root it and try to flash a custom rom (bookmarking this thread...fairly certain I'll be back lol)
THANK YOU FOR THIS THREAD AND ALL YOUR WORK!!

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kmonagle said:
wow...was just to give up on my l9 w/security error as a casualty of my compulsive need to jack around with my phones and I find this. I had rooted and tried to flash CWM when everything went wrong. I had been deep into cmahendra's thread but my phone was never recognized...I was missing the fastboot/flashing step. Once I flashed the .img files cmahendra's awesome method went off without a hitch.
OK so I feel like I can get it back to stock if I screw up so I'm gonna go root it and try to flash a custom rom (bookmarking this thread...fairly certain I'll be back lol)
THANK YOU FOR THIS THREAD AND ALL YOUR WORK!!
Click to expand...
Click to collapse
If your bootloader is locked you're gonna end up with a mess to straighten out. It can be fixed tho. Bootloader must be unlocked to flash custom recovery and/or ROM.

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I'm currently trying to go through the steps. I am on the part to run commands for the img files but i get this error "error: cannot load '2u-ice.img' "
Am i doing something wrong?

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screen not working
fox12345 said:
i have problem after flashing wrong recovery img to to lg p769 ,the phone stock with lg logo with Security Error.
i try to flash V20D_00.kdz with no luck.it was abig problem ,and i try alot of ways you name it ,and search the net with no luck .untill i see post wasn't clear .So i put it togther to be an eazy way to fix LG SECURITY ERROR
you need :
1-fastboot zip file for ( l9 p760 p765 p768 p769 )from here http://forum.xda-developers.com/showthread.php?p=41768774 thanks to Lelus
unzip it and move to C:/ direct
2- this script below and the ALL (3) img from here http://forum.xda-developers.com/showthread.php?p=43642515&highlight=lelus+batch+script#post43642515 thanks to kuma82
move the (3) img's to bin folder inside C:/fastboot/bin
fastboot devices
fastboot erase u-boot
fastboot erase boot
fastboot erase recovery
fastboot flash u-boot 2u-ice.img
fastboot flash boot 3boot-ice.img
fastboot flash recovery 4recovery-ice.img
3-KDZ_FW_UPD_EN.zip and shttps.zip (if you dont have them) from here http://forum.xda-developers.com/showthread.php?p=36351786 thanks to cmahendra
4- you KDZ or ROM from here http://forum.xda-developers.com/showthread.php?t=2107971
instuction
1- put you phone in fastboot mode ,follow this post http://forum.xda-developers.com/showpost.php?p=44578108&postcount=34 thanks to kuma82 for the images
2-Run cmd (run as administrator) and drag the bin foler to cmd directory OR type cd C:\fastboot\bin
3-copy and past the script in # 2 one at the time .then toen off the phone
4-hold the Volume UP and plug the USB to the phone to be in Software Upgrade Mode.
you can follow this post http://forum.xda-developers.com/showthread.php?p=36351786 thanks to cmahendra,
you should have you phone back unbricked
good luck
Click to expand...
Click to collapse
i did the fastboot, now it doesnt show security error, actually its not showing anything on my phone screen , update went till 50% and then says phone not connected. Im stuck.
what should i do now?

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Huh??
phonecow said:
The issue i am having is keeping the LG P2 or anything in device manager stable without it consantly reloading.
I did manage to get to S/W upgrading once (but didnt have the other steps installed/finished yet.) I think i did it by eventually doing step 5 (after all the step 1 stuff) on lelus fastboot.
Im hoping i cant just jump right off there (IF i can get it to get to s/w again) as im guessing all s/w upgrade screens are the same point.
Crossing my fingers that i can figure out how to make all this work! Stupide security lock
Click to expand...
Click to collapse
I get an error cannot load ' '

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swaggyp said:
I get an error cannot load ' '
Click to expand...
Click to collapse
i now be sercurity error too i find out to use lg support tool, but when i chose upgrade recovery this soft ware said that i have to conect phone to PC (but it conected and S/W mode, i also installed lastest driver and run with window 8) so what i have to do. I also read fastboot way but still cant instal usb_drv_windows any advise for me, thanks guys:crying:

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it is still loading, yet thank you
fox12345 said:
i have problem after flashing wrong recovery img to to lg p769 ,the phone stock with lg logo with Security Error.
i try to flash V20D_00.kdz with no luck.it was abig problem ,and i try alot of ways you name it ,and search the net with no luck .untill i see post wasn't clear .So i put it togther to be an eazy way to fix LG SECURITY ERROR
you need :
1-fastboot zip file for ( l9 p760 p765 p768 p769 )from here http://forum.xda-developers.com/showthread.php?p=41768774 thanks to Lelus
unzip it and move to C:/ direct
2- this script below and the ALL (3) img from here http://forum.xda-developers.com/showthread.php?p=43642515&highlight=lelus+batch+script#post43642515 thanks to kuma82
move the (3) img's to bin folder inside C:/fastboot/bin
fastboot devices
fastboot erase u-boot
fastboot erase boot
fastboot erase recovery
fastboot flash u-boot 2u-ice.img
fastboot flash boot 3boot-ice.img
fastboot flash recovery 4recovery-ice.img
3-KDZ_FW_UPD_EN.zip and shttps.zip (if you dont have them) from here http://forum.xda-developers.com/showthread.php?p=36351786 thanks to cmahendra
.......good luck
Click to expand...
Click to collapse
Thanks for putting this guide up, I was stuck at the point where the LG Mobile Phone Software, would say that my device is not connected with USB. But I know it was because I had it all connected, it showed up in the device manger and was recognized by fastboot. I guess I just didn't have the right images to be compatible with flashed onto the device. Thanks to you putting all of this together, it finally worked again. Thanks a lot life saver!!!!!!!!!!!

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Undesired lines in LG optimus L9 P765
I opted this method to unbrick because i was getting the same security error. And successfully installed all the 3 images. But it was after installing these the real problem came in. Now i could enter the bootloader but it appeared to be a set of multi colored lines. And when i tried to replace the installed recovery img with CWM img, the security error problem again came in. I am trapped in a situation that i have to get access somehow to CWM or any alternative. Can someone suggest me some good alternative for lg p765? or is there any work around for this?

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Hello
I cant do
4-hold the Volume UP and plug the USB to the phone to be in Software Upgrade Mode.
because when I do it, my phone give me Security Error again !
How to solve it?

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This is what happens to me:
Code:
ECHO está desativado.
Plug USB cable
wait 4 seconds and put battery back in.
waiting for OMAP44xx device...
Device descriptor:
bLength = 18
bDescriptorType = 1
bcdUSB = 528
bDeviceClass = 255
bDeviceSubClass = 255
bDeviceProtocol = 255
bMaxPacketSize0 = 64
idVendor = 451
idProduct = D00F
bcdDevice = 0
iManufacturer = 33
iProduct = 37
iSerialNumber = 0
bNumConfigurations = 1
reading ASIC ID
usb_write 4
usb_read 81
[*] read 0 bytes
NumOfSubblocks: 0x5
Subblock ID: 0x1
Subblock Size: 0x5
CH enabled: 0x7
ROM revision: 0x4
Checksum Subblock: 0x15
CHIP: 4430
IDEN: fcf149ef997dfa51964b1dc43066037420a15e2a
MPKH: 5f4092eccddf90fa43f546adf89508b31b9c74795e9516194c0ea6412fdcb7f6
CRC0: 9c669ad9
CRC1: 682adccf
sending 2ndstage to target... f0030002
usb_write 4
usb_write 4
wait 5-lelelel...
[*] msg size = 4
usb_write 21552
[*] data size = 21552
usb_close
Reopen usb...
Device descriptor:
bLength = 18
bDescriptorType = 1
bcdUSB = 528
bDeviceClass = 255
bDeviceSubClass = 255
bDeviceProtocol = 255
bMaxPacketSize0 = 64
idVendor = 451
idProduct = D00F
bcdDevice = 0
iManufacturer = 33
iProduct = 37
iSerialNumber = 0
bNumConfigurations = 1
waiting for 2ndstage response...
usb_read 4
usb read = aabbccdd
accepted 2ndstage response
sending image to target...
size = 246272
usb_write 4
usb_write 246272
** Done **
Microsoft Windows [versão 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. Todos os direitos reservados.
C:\fastboot\yours>fastboot erase u-boot
< waiting for device >
^C
C:\fastboot\yours>fastboot erase boot
< waiting for device >
^C
C:\fastboot\yours>fastboot erase recovery
< waiting for device >
^C
C:\fastboot\yours>fastboot flash u-boot 2u-ice.img
error: cannot load '2u-ice.img'
C:\fastboot\yours>fastboot flash boot 3boot-ice.img
error: cannot load '3boot-ice.img'
C:\fastboot\yours>fastboot flash recovery 4recovery-ice.img
error: cannot load '4recovery-ice.img'
C:\fastboot\yours>
Am I doing something wrong?

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Would there be a way without having to connect it to the pc? PC keeps losing connection, and doesn't recognize the device. I installed the OMAP drivers manually, but still it's not recognized. Could I try something from SD card maybe? Or is it time to throw it away?

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Lg P760 after this procedure phone is compleatly dead.
C:\fastboot\bin>fastboot devices
016361571101D00E fastboot
C:\fastboot\bin>fastboot erase u-boot
erasing 'u-boot'...
OKAY [ 0.031s]
finished. total time: 0.031s
C:\fastboot\bin>fastboot erase boot
erasing 'boot'...
OKAY [ 0.016s]
finished. total time: 0.016s
C:\fastboot\bin>fastboot erase recovery
erasing 'recovery'...
OKAY [ 0.016s]
finished. total time: 0.016s
C:\fastboot\bin>fastboot flash u-boot 2u-ice.img
sending 'u-boot' (1024 KB)...
OKAY [ 0.531s]
writing 'u-boot'...
OKAY [ 2.813s]
finished. total time: 3.344s
C:\fastboot\bin>fastboot flash boot 3boot-ice.img
sending 'boot' (6656 KB)...
OKAY [ 3.422s]
writing 'boot'...
OKAY [ 2.813s]
finished. total time: 6.234s
C:\fastboot\bin>fastboot flash recovery 4recovery-ice.img
sending 'recovery' (7680 KB)...
OKAY [ 3.938s]
writing 'recovery'...
OKAY [ 2.828s]
finished. total time: 6.766s
C:\fastboot\bin>
---------- Post added at 05:16 PM ---------- Previous post was at 04:57 PM ----------
Any help for unbrick?