[Q] Can't switch on LG Optimus Black P970 - General Questions and Answers

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.

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Dear all,
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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[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:
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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.

[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] Lg flashtool

Hello i need some help im trying to reinstall my lg l70 android thro lg flash tool 2014 the reason is some time ago i had my stock system and i wanted to upgrade so installed cyanmod 12.1 and everything was ok but then for some rason i installed cyanmod 13 and my sim card dindn't work then i tried to use my backup of my stock system but it failed and i was in a bootloop then i used lg flash tool 2014 i got a android im guessing it was lg l70 metro pcs version and the issue is i can' t open apps normally .When i unlocked devlopers options i try to open them but nothing happens im just stuck with a black screen and after a few minutets it crashes and it with other apps too like youtube,games and somethomes internet and gallery and any fixes? I tried to reinstall my system but LG flash tool shows S/W Upgrade in progress and phone stuck at LG screen and ive tried to to a factory reset didn't help and my phone now isnt rooted e.t.c soo what should i do to fix this issue?
XDA Visitor said:
Hello i need some help im trying to reinstall my lg l70 android thro lg flash tool 2014 the reason is some time ago i had my stock system and i wanted to upgrade so installed cyanmod 12.1 and everything was ok but then for some rason i installed cyanmod 13 and my sim card dindn't work then i tried to use my backup of my stock system but it failed and i was in a bootloop then i used lg flash tool 2014 i got a android im guessing it was lg l70 metro pcs version and the issue is i can' t open apps normally .When i unlocked devlopers options i try to open them but nothing happens im just stuck with a black screen and after a few minutets it crashes and it with other apps too like youtube,games and somethomes internet and gallery and any fixes? I tried to reinstall my system but LG flash tool shows S/W Upgrade in progress and phone stuck at LG screen and ive tried to to a factory reset didn't help and my phone now isnt rooted e.t.c soo what should i do to fix this issue?
Click to expand...
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Greetings,
Thanks for using XDA Assist and welcome to XDA!
I have searched XDA and it seems your device is supported here:
LG L90
If you create an account with XDA (It's Free!!) you can ask for help here:
Optimus L90 Q&A, Help & Troubleshooting
Good luck!

Lg Optimus L5 Ii Dual E455 [BOOTLOOP] [NO RECOVERY MODE- DEAD ANDROID][STUCK AT 4%]

Hey guys!, how are you?
I do not know how to solve this problem.. i have been trying to solve this for WEEKS :crying: , but have had no success.
I do not know what to do now.. my phone is stuck in boot loop and can't enter recovery mode because of "dead android logo" (theres nothing i can do)
There is ANOTHER problem here: when i try to flash a ROM with the LG Flash Tool it fails, getting stuck at 4% and giving an error while trying to flash the .KDZ file.. i do not know what is going on.. i mean, LG Mobile Support Tool recognizes my phone,it shows the model and the current SW version.
Can you please help me?
Thanks!!

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