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[Q] Can't switch on LG Optimus Black P970

Hi Friends,
I am newbie to this forum. Please help me!!
I bought a new Optimus Black P970 a month back. Today i tried to upgrade my mobile using LG updater tool, it downloads the firmware and the mobile restart, after restarting.. It shows Upgrading window and suddenly
"Communication error between phone and system" Error throws.
It shows the recovery option by remove the battery and put it again and then switch on.. and restart the update. I tried but same problem exists.
I tried to hard reset, no use.
Please help me guys. I helpless.

[Q] {Q} How to remove lg f160l seccurity error screen

Hi,
I just bought my new lg optimus f160l and messed it up on the very first day...... i uninstalled some system apps and it was working all fine..........then i rebooted it and it got stuck on security error logo....
whenever i try to open it.....i see the lg logo for a sec......the shiny lg logo then.......and then the lg logo with security error written beneath it......then a total black out.
I seriously need help with my mobile. PLEASE PLEASE PLEASE! ANYONE HELP ME!

[Completed] [Q] Getting error when booting into recovery.

I get
Secure booting Error!
Cause : boot certification verify
This shows in the top left corner when booting into recovery I have tried using the freegee method but it doesn't give me the option to unlock my bootloader. And ideas or known fixes? Thanks for trying to help.
Note: This also happens when attempting to flash ROMs.
Edit: MY Phone is a LG Optimus Pro E980 running 4.4.2

Hi, it would really help to know what device we're talking about.

Sorry
I thought I included this in but LG Optimus G pro E980.

BRICK HELP. lg g stylo boost mobile

hello. i recently got a lg stylo from a friend not knowing what update it was on. (6.0) i did king root and it worked fine for a few days until i shut down my phone.
now im stuck on a boot loop i cant get passed. i looked everywhere. is this bricked or soft bricked? can this be fixed from a guide on here? please i need some help.
i also get a
secure booting error!
error code : 1003
MODIFIED !!
message with every boot loop

reymontes said:
hello. i recently got a lg stylo from a friend not knowing what update it was on. (6.0) i did king root and it worked fine for a few days until i shut down my phone.
now im stuck on a boot loop i cant get passed. i looked everywhere. is this bricked or soft bricked? can this be fixed from a guide on here? please i need some help.
i also get a
secure booting error!
error code : 1003
MODIFIED !!
message with every boot loop
Click to expand...
Click to collapse
This might work
http://forum.xda-developers.com/lg-g-stylo/how-to/official-boost-lg-g-stylo-unbrick-guide-t3215198

reymontes said:
hello. i recently got a lg stylo from a friend not knowing what update it was on. (6.0) i did king root and it worked fine for a few days until i shut down my phone.
now im stuck on a boot loop i cant get passed. i looked everywhere. is this bricked or soft bricked? can this be fixed from a guide on here? please i need some help.
i also get a
secure booting error!
error code : 1003
MODIFIED !!
message with every boot loop
Click to expand...
Click to collapse
if in warranty call lg dont mention root they gona fix

[HELP] LG MS330 - [Authentication Fail #9] [MODIFIED]

Hello everyone, I hope you are very well.
A few days ago, a family brought me a phone to try to fix it, it is an LG MS330.
The phone turns on, shows the typical LG logo and after a few seconds it shows the message:
Security Error
[Authentication Fail # 9] [MODIFIED]
Click to expand...
Click to collapse
Which makes me think that someone installed an unofficial firmware on it and was what caused the problem. Everything normal up to here, the real problem happens when I try to flash the device through the download mode, where it shows me the following error:
Secure booting Error!
Error code : 1009
MODIFIED !!
Click to expand...
Click to collapse
After a few seconds of throwing this error, the phone automatically shuts down and restarts.
The real problem is that it does not let me under any circumstances flash the firmware of the phone and I also cannot create the connection between the computer and the phone to be able to flash it.
I have tried various programs such as LG Flash Tool, LG UP, LG Mobile Support and have not been successful with any.
Could anyone help me please?
I really don't know what to do at this point anymore. Does the phone have salvation? Is there something that can be done?