[SOLVED][ERROR] Device stuck on boot! Error: Boot Image Signature

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TechnoBraker

Member
Jul 26, 2012
40
17
Mumbai
Guys,
I'm relatively new to flashing recovery and ROMs..
So, sorry if this is a noob question..
I really need urgent help!

I am on V20a (ESA-XXX) and have successfully rooted my phone.

I tried installing CWM using this method..
http://forum.xda-developers.com/showthread.php?t=2180138

I used the unsecure boot provided by gordon0001
http://forum.xda-developers.com/showthread.php?p=39918805&highlight=unsecure#post39918805

After i restarted my phone, it got stuck at boot!!
Its gives the following error and turns of in 5 seconds..

[LG-Security] Error: Boot Image Signature!

The phone doesn't start and does not go into recovery either..
The phone is not even recognised by my PC.. keeps restarting (to error screen) if i connect to pc..
Please, someone help me.. I'm really scared.. I don't want to lose my phone.. :crying:

I read a similar prob, but no solution found..
http://forum.xda-developers.com/showthread.php?t=2223697

PLEASE HELP!!

SOLUTION:
Reflash .kdz via Software Upgrade Mode (hold Power button and Volume - )
 
Last edited:
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hernestwisnu

Senior Member
Feb 11, 2013
177
47
Jakarta
Dude, reflashing your phone should work. As long as SW mode is still accessible, your phone isn't dead yet. Follow the instructions on this post http://forum.xda-developers.com/showthread.php?p=35971349 Be freaking sure all necessary drivers are properly installed.

Or you can put your phone in recovery mode (power + vol +) and reinstall the stock rom using recovery LG tools providing your Internet connection is fast and stable

Sent from my LG-P880 using Tapatalk 2
 
Last edited:

alekthefirst

Senior Member
May 19, 2012
209
38
hey dude, i have flashed 7 times exactly since this morning only. and i have gotten that error 3 times of those 7. so it should not be a problem
 

TechnoBraker

Member
Jul 26, 2012
40
17
Mumbai
Thanks!

After a few attempts, was able to go to the s/w upgrade mode.. (power + vol(-) )
Reflashed .kdz and it's all good.. (had to root again)

Actually, i was freaked out more coz it's my new phone and i didn't find others with the problem..
I hope that this thread would help if anyone faces a similar problem in the future..
Thanks for the prompt response, guys! :D
 

RuedasLocas

Senior Member
Aug 12, 2012
1,589
499
51
Gdansk, Poland
After a few attempts, was able to go to the s/w upgrade mode.. (power + vol(-) )
Reflashed .kdz and it's all good.. (had to root again)

Actually, i was freaked out more coz it's my new phone and i didn't find others with the problem..
I hope that this thread would help if anyone faces a similar problem in the future..
Thanks for the prompt response, guys! :D

You don't read a lot, right?...
If I had 100€ for each user that had that same problem...
(thinking about 1€, hummm?... of course not, 100's better)
 

GeBoe

Member
Apr 13, 2012
30
4
Guys,
I'm relatively new to flashing recovery and ROMs..
So, sorry if this is a noob question..
I really need urgent help!

I am on V20a (ESA-XXX) and have successfully rooted my phone.

I tried installing CWM using this method..
http://forum.xda-developers.com/showthread.php?t=2180138

I used the unsecure boot provided by gordon0001
http://forum.xda-developers.com/showthread.php?p=39918805&highlight=unsecure#post39918805

After i restarted my phone, it got stuck at boot!!
Its gives the following error and turns of in 5 seconds..

[LG-Security] Error: Boot Image Signature!

The phone doesn't start and does not go into recovery either..
The phone is not even recognised by my PC.. keeps restarting (to error screen) if i connect to pc..
Please, someone help me.. I'm really scared.. I don't want to lose my phone.. :crying:

I read a similar prob, but no solution found..
http://forum.xda-developers.com/showthread.php?t=2223697

PLEASE HELP!!

SOLUTION:
Reflash .kdz via Software Upgrade Mode (hold Power button and Volume - )

But WHY AND HOW did it happen? have you flashed a custom rom now without errors?
 

askinkoc

Member
Sep 30, 2012
30
8
I solved the problem flashing back to stock rom.

From this page http://lg-phone-firmware.com/ you may download your original stock rom.

WARNING: IF YOU FLASHED YOUR PHONE WITH A CUSTOM ROM, NEVER TRY TO FLASH BACK TO AN ORIGINAL STOCK ROM.
 
Last edited:

laufersteppenwolf

Inactive Recognized Developer / Retired Forum Mod
Jul 1, 2012
2,863
6,989
Baden-Württemberg
droideveloper.com
I solved the problem flashing back to stock rom.

From this page http://lg-phone-firmware.com/ you may download your original stock rom.

WARNING: IF YOU FLASHED YOUR PHONE WITH A CUSTOM ROM, NEVER TRY TO FLASH BACK TO AN ORIGINAL STOCK ROM.

And once again:
flashing stock is not at all dangerous. it will not brick your device or something else.
Sometimes you even have to re-stock your phone.
 

TechnoBraker

Member
Jul 26, 2012
40
17
Mumbai
Stock is safe!

I solved the problem flashing back to stock rom.

From this page http://lg-phone-firmware.com/ you may download your original stock rom.

WARNING: IF YOU FLASHED YOUR PHONE WITH A CUSTOM ROM, NEVER TRY TO FLASH BACK TO AN ORIGINAL STOCK ROM.

haha, flashing the stock rom back can never be a problem..
that is the only rom which inherently supposed to be problem-free!
 

STRAWBERRYHEAD

New member
Aug 16, 2013
2
0
You needed to unlock bootloader first, either "adb reboot oem-unlock" or download terminal emulator, root the phone and type:

su
echo 40000000c8 > /sys/firmware/fuse/odm_reserved

Sent from my rooted P880

just tried this ^^^ worked thanks

Had the exact same problem as TechnoBraker however if you held the power button as the phone turned to "power save" and you timed it perfectly it would start normally and as long as i didnt try to go into recovery mode it was fine
 

alexxutzu

Senior Member
May 19, 2012
680
87
Bucharest
Hello. PLEASE, can anyone help me, I have a LG 4x and I've tried to flash CWM image from here http://forum.xda-developers.com/showthread.php?t=2298420 but I cannot entry after that in Software Update ( Volume - and Power button) and not even with (Volume + Home and Power Button). I get this error [LGE _SECURITY]error: boot image signature
[LGE _SECURITY]5 seconds after power is turned off for power saving


My phone start very well, I can talk from him but I can not make Factory Reset and flash back the stock rom.

Sorry for my english and I hope someone can help me!

Thank you!
 

Flying_Bear

Senior Member
Jan 16, 2011
1,874
799
Hello. PLEASE, can anyone help me, I have a LG 4x and I've tried to flash CWM image from here http://forum.xda-developers.com/showthread.php?t=2298420 but I cannot entry after that in Software Update ( Volume - and Power button) and not even with (Volume + Home and Power Button). I get this error [LGE _SECURITY]error: boot image signature
[LGE _SECURITY]5 seconds after power is turned off for power saving


My phone start very well, I can talk from him but I can not make Factory Reset and flash back the stock rom.

Sorry for my english and I hope someone can help me!

Thank you!

you installed cwm without unlocking bootloader. re-flash 20a/20b (jellybean 4.1.2) kdz, then unlock your bootloader, then install any custom recovery you want/need
 

mivoe99

Senior Member
Mar 4, 2014
77
3
Have i go bak to JB anytime?

you installed cwm without unlocking bootloader. re-flash 20a/20b (jellybean 4.1.2) kdz, then unlock your bootloader, then install any custom recovery you want/need

HEy
I have a question:
Have I flash to JB back anyway or can I only Unlock my BL and then it will work?

Sry my English is very bad ;)
 

mivoe99

Senior Member
Mar 4, 2014
77
3
Ok, but I haven't installed a cousom ROM

Bootloader unlocking is only available if you're on JB. If your boot image is faulty you need to revert back to official JB.

Sent from my LG-P880 using XDA Premium 4 mobile app
I havent' installed a cusotm ROM yet. I have only installed CWM with ROM Manager, but i have already tried to delete the CWM I want to flash it manual.
;)
My ROM is the normal LG P880 ROM JB.
How or have I go back to the normal JB?

Sry for my English I'm german
 
Last edited:

Omario-242

Senior Member
Feb 18, 2011
1,132
389
Munich
Google Pixel 6 Pro
I havent' installed a cusotm ROM yet. I have only installed CWM with ROM Manager, but i have already tried to delete the CWM I want to flash it manual.
;)
My ROM is the normal LG P880 ROM JB.
How or have I go back to the normal JB?

Sry for my English I'm german

German here too ;)

So if I understood you right, you tried to install CWM without unlocking your boot loader? So now you got a boot image error? I'd suggest to try LG Mobile Support Tool and flash V20A/V20B and then unlock Boot loader. Even if you're on "official JB" as of now, installing CWM without unlocked bootloader screwed your boot image and there's no way to do anything without flashing back a kdz. :)

Sent from my LG-P880 using XDA Premium 4 mobile app
 
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mivoe99

Senior Member
Mar 4, 2014
77
3
LG Mobil Support Tool doesn't work

German here too ;)

So if I understood you right, you tried to install CWM without unlocking your boot loader? So now you got a boot image error? I'd suggest to try LG Mobile Support Tool and flash V20A/V20B and then unlock Boot loader. Even if you're on "official JB" as of now, installing CWM without unlocked bootloader screwed your boot image and there's no way to do anything without flashing back a kdz. :)

Sent from my LG-P880 using XDA Premium 4 mobile app

Hey,
I have tried to do the Update to the Firmware by LG Mobile Support Tool but there is a Error every try. I have tried it about ten times but the Update fails every time. What can I do now? :/
There is no Error Code or something.
Can help a factory reset there?
Or should i falsh the Original Recovery with the All-in-One toolkit?
 
Last edited:

Omario-242

Senior Member
Feb 18, 2011
1,132
389
Munich
Google Pixel 6 Pro
Hey,
I have tried to do the Update to the Firmware by LG Mobile Support Tool but there is a Error every try. I have tried it about ten times but the Update fails every time. What can I do now? :/
There is no Error Code or something.
Can help a factory reset there?
Or should i falsh the Original Recovery with the All-in-One toolkit?

Could be due to wrong drivers. Reinstall them and try again.

Sent from my LG-P880 using XDA Premium 4 mobile app
 
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  • 3
    Dude, reflashing your phone should work. As long as SW mode is still accessible, your phone isn't dead yet. Follow the instructions on this post http://forum.xda-developers.com/showthread.php?p=35971349 Be freaking sure all necessary drivers are properly installed.

    Or you can put your phone in recovery mode (power + vol +) and reinstall the stock rom using recovery LG tools providing your Internet connection is fast and stable

    Sent from my LG-P880 using Tapatalk 2
    1
    Guys,
    I'm relatively new to flashing recovery and ROMs..
    So, sorry if this is a noob question..
    I really need urgent help!

    I am on V20a (ESA-XXX) and have successfully rooted my phone.

    I tried installing CWM using this method..
    http://forum.xda-developers.com/showthread.php?t=2180138

    I used the unsecure boot provided by gordon0001
    http://forum.xda-developers.com/showthread.php?p=39918805&highlight=unsecure#post39918805

    After i restarted my phone, it got stuck at boot!!
    Its gives the following error and turns of in 5 seconds..

    [LG-Security] Error: Boot Image Signature!

    The phone doesn't start and does not go into recovery either..
    The phone is not even recognised by my PC.. keeps restarting (to error screen) if i connect to pc..
    Please, someone help me.. I'm really scared.. I don't want to lose my phone.. :crying:

    I read a similar prob, but no solution found..
    http://forum.xda-developers.com/showthread.php?t=2223697

    PLEASE HELP!!

    SOLUTION:
    Reflash .kdz via Software Upgrade Mode (hold Power button and Volume - )
    1
    But WHY AND HOW did it happen? have you flashed a custom rom now without errors?

    You needed to unlock bootloader first, either "adb reboot oem-unlock" or download terminal emulator, root the phone and type:

    su
    echo 40000000c8 > /sys/firmware/fuse/odm_reserved

    Sent from my rooted P880
    1
    I havent' installed a cusotm ROM yet. I have only installed CWM with ROM Manager, but i have already tried to delete the CWM I want to flash it manual.
    ;)
    My ROM is the normal LG P880 ROM JB.
    How or have I go back to the normal JB?

    Sry for my English I'm german

    German here too ;)

    So if I understood you right, you tried to install CWM without unlocking your boot loader? So now you got a boot image error? I'd suggest to try LG Mobile Support Tool and flash V20A/V20B and then unlock Boot loader. Even if you're on "official JB" as of now, installing CWM without unlocked bootloader screwed your boot image and there's no way to do anything without flashing back a kdz. :)

    Sent from my LG-P880 using XDA Premium 4 mobile app
    1
    Hey,
    I have tried to do the Update to the Firmware by LG Mobile Support Tool but there is a Error every try. I have tried it about ten times but the Update fails every time. What can I do now? :/
    There is no Error Code or something.
    Can help a factory reset there?
    Or should i falsh the Original Recovery with the All-in-One toolkit?

    Could be due to wrong drivers. Reinstall them and try again.

    Sent from my LG-P880 using XDA Premium 4 mobile app