(Need Help thread) Lg G3 32 gb(d855) security boot error(no download mode)? - General Questions and Answers

im using lg g3 d855 32 gb international version.
i unroot my phone but when im unrooting i get update fail and my phone stuck at blue screen with number 3 so i remove my battery and turn my mobile on. accidentally i plugged the phone on usb now im getting security boot error and i cant go to download mode anymore.
plz i need some help to fix my phone.i spent my whole month salary on it and now its bricked. :crying:

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At present my phone is not getting on.
Yesterday i tried to install new rom to my lg optimus p500 via kdz updater actually i dnt knw how to install it, on updating it fails, i repeated the process 2-3 times and screen goes blank and shows emergency mode,then i removed usb cable the phone goes off, till now its not getting on, i don't know what to do
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[Q] [BRICKED]Pc wont detect phone in emergency mode PLZ help

I got LG p690 (optimus net) and have flashed cwmod..Everything was working smooth till 1 month ago where it started rebooting on random times (when i plugged in the charger or phonecall) and it had issues booting up (black and white stripes after lg logo) now it wont go into recovery mode but it gets into emergency mode np(i had cyanogen mod running).I am trying 2 days straight to get it detected by my pc (win7 64bit ultimate)but it just wont saw a sing of life.(there was one time it somehow made it but it failed to be recognised correctly)....so...
Plz someone that can help me with this..i dont know what im doing wrong plz help
:crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:
lg p690 said:
I got LG p690 (optimus net) and have flashed cwmod..Everything was working smooth till 1 month ago where it started rebooting on random times (when i plugged in the charger or phonecall) and it had issues booting up (black and white stripes after lg logo) now it wont go into recovery mode but it gets into emergency mode np(i had cyanogen mod running).I am trying 2 days straight to get it detected by my pc (win7 64bit ultimate)but it just wont saw a sing of life.(there was one time it somehow made it but it failed to be recognised correctly)....so...
Plz someone that can help me with this..i dont know what im doing wrong plz help
:crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:
Click to expand...
Click to collapse
plz someone help

[Completed] Verizon LG G2 bricked after OTA kitkat update

My G2 has been bricked since April and have had no success to revive my phone.
The phone goes to a blank screen after the LG logos shows up. Also I can't get into download or recovery mode. Whenever I connect the phone to my computer a bunch of drivers start popping up and that's as far as I can get.
Please can somebody help me out!!!!!
Caj31 said:
My G2 has been bricked since April and have had no success to revive my phone.
The phone goes to a blank screen after the LG logos shows up. Also I can't get into download or recovery mode. Whenever I connect the phone to my computer a bunch of drivers start popping up and that's as far as I can get.
Please can somebody help me out!!!!!
Click to expand...
Click to collapse
Hi!
I found a similar issue....perhaps it can help?
Otherwise without being able to get into download or recovery modes is not good. Service may be the only other option.
http://forum.xda-developers.com/showthread.php?t=2654355
Good luck!

[Completed] [Q] LG G3 D852 FlashTool Says Wrong Model

So Long Story,
Monday I Changed Out Battery Go To Restart Phone, Phone Wont Boot Stuck On LG Screens And Constantly Retrying. Tuesday Night I ReInstall Factory Firmware For G3 D852 - With Success - Phone Working. Wednesday I Decide To Root & Install TWRP - With Success - Phone Working No Issues. Today This Is Where Sh*t Hits The Fan! I Get Crazy & Attempt To Install ChupaChups Lollipop Rom With TWRP - Seemingly Successful Install But After Reboot Wont Boot Stuck In Fast Boot. So I Attempt To Resolve This Following Other Forum Posts Using FastBootOV - WITHOUT Success - Now When Attempting To Boot Phone LG Screen Comes Up Top Left Corner Says "ERROR Boot Certification Verify" Below That Says "590 Secure Booting ERROR!" Then Black Screen With Flashing Red & Blue LED. I Attempted To ReInstall Factory Firmware With LG Flashtool Attempt Fails Stating Wrong Model Number - Phone States On Screen Near Bottom Now D855 Ver5.0 Below That D85520A. What Do I Do Now? How To Get Back To D852? Do I Try To Install D855 Firmware? HELP Im Lost & Frustrated :crying:
Thanks
LG G3 D852 Bell Mobility Phone. 32G.
I Just Want To Try A Debloated OS. And Here I Am.
Hi,
I see you found your device section and asked about this there.... Awesome! ?
XDA Assist is here to help navigate the site, not for support.... And you found your way already!
Thank you, thread closed.

[Completed] [Q] Hard Bricked LG G3 D855, Computer cant find MTP device in download mode

Hello guys!
I Have rooted my EURO LG G3 D855, and was trying to custom recovery my phone with the app (Rashr - Flash Tool). DId also try flashify but I couldnt get into recovery mode. When I tried Rashr the last time it did say the successful. So i restarded my phone and the phone was hard bricked.
- I Can get into download mode, but my computer wont fin MTP Device. (Have download the drivers from LG site).
- When i start up my phone it says up in the left corner:
error : Boot certification verify
[620]
[620]Secure booting error!
[620]Cause : booting certification verify
[620]
And the led in the left corner blinks with blue and red light.
Do someone of you guys know how to fix this? Or should i just give up and buy one new phone? :crying:
Hi,
Thanks for using XDA Assist Following Thread may help you in your issue
[Guide] LG G3 Stock Firmware (Go Back to Stock) KDZ & TOT Method
Good Luck!
No Response ...Thread Closed

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