Please help "Secure Booting Unsuccessful Cause:" Dont know how to fix - LG Optimus L9 P760, P765, P768, P769

Nevermind got it fixed
During the day as I was using my Lg P760 it locked up and went to reboot itself but it also locked up at the play logo animation (I waited for over an hour but nothing) So I removed the battery and reinserted it and started back up and got the message
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Secure Booting Unsuccessful
Cause:
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Please!
Edit: Now when I got home from school the phone turned itself on and has the buttons lit up with a blank screen...
(Lg should actually tell the cause too...)

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Stuck on LG boot screen(no boot loop just frozen)

I urgently need help as my lg optimus l9 p769 will not boot past lg screen (it is not a boot loop it just stays frozen for about 4 seconds then it shuts off, then if I put my charger in, it boots to the lg logo and permanently freezes there)
this first started when I changed my cm 10.1 theme, I left my phone but when I came back it was off. the only way for me to turn it off was to take the battery out. When I took the battery out and put it back in, it would automatically boot itself up. Eventually I decided I better change my recovery from the physical keys to the touch screen one. I flashed a touch screen clockwork recovery through adb from my command prompt after I did that I decided to boot into the recovery so in the command prompt I typed up the command to boot into the recovery when I did that nothing happened and I was still in fastboot mode. So I decided to shut the phone off, after that that's when it started to not boot past lg logo screen and freeze on logo screen after I put in the charger.
I cant get into download mode
my recovery does not work
my power button might be broken( I cant tell as it suddenly stopped working for no reason after I applied a new theme)
(I will open up my phone if I need too, if I do how would I disable the power button, or fix it)

Bootloop, won't go into recovery

Hey y'all hopefully I haven't rendered this phone completely useless, but I had rooted it some while ago and it was working like a charm until one day it froze, restarted, and bootlooped. When I left it alone for about an hour, it would boot to the OS but restarted and bootlooped after 5 minutes tops. I followed the steps by thejesus to install the original rom and basically unroot it. Now my issue is now not only is it bootlooping when I try to turn it on, but when I try to boot into recovery to do the reset, it won't even boot into recovery. It gives me those 2 options I say yes to with the volume keys and power button, but after I press okay it goes right back to the LG logo, the "your device can't be checked for corruption" text then back to the LG logo ad nauseam.
210wrecked said:
Hey y'all hopefully I haven't rendered this phone completely useless, but I had rooted it some while ago and it was working like a charm until one day it froze, restarted, and bootlooped. When I left it alone for about an hour, it would boot to the OS but restarted and bootlooped after 5 minutes tops. I followed the steps by thejesus to install the original rom and basically unroot it. Now my issue is now not only is it bootlooping when I try to turn it on, but when I try to boot into recovery to do the reset, it won't even boot into recovery. It gives me those 2 options I say yes to with the volume keys and power button, but after I press okay it goes right back to the LG logo, the "your device can't be checked for corruption" text then back to the LG logo ad nauseam.
Click to expand...
Click to collapse
Hi, same thing happened to mine. Sent to Service center not under warranty they replaced the mainboard but paid nothing.
DeeFolt said:
Hi, same thing happened to mine. Sent to Service center not under warranty they replaced the mainboard but paid nothing.
Click to expand...
Click to collapse
Not an option for me. Didn't pay it off under my contract and had the IMEI blocked so I changed it.

stuck in boot screen, and have a weird green, red, blue screen

Hey guys hope you're fine ^^
A friend of mine is having an issue with his phone so he asked me for help, and now i'm asking you lol
well the problem is that :
1- having a weird colored screen on startup (1st attached image)
2- after few second the phone just get stuck on boot animation (2nd attached image)
3- sometimes the phone goes into and update screen and then get stuck on 5% and after a while reboots (3rd attached image)
4- the phone just wont shut down it when i hold the power button the screen goes black, then instantly i feel a vibration and the multicolored screen comes back, then the same story "boot loop"
Well now let me tell you how this problem occurred, well my friend bought this phone from someone, so he doesn't know if there was custom recovery ever installed on this phone or if it's on stuck recovery
the phone was working fine, then one day an update notification pops up, he does the update, the first time it showed him an error message, but he tried one more time and it got throw the update process, unfortunately the phone got rebooted but never made it past the boot screen
now because the phone won't shut down, i can't get into fast boot or recovery mode (i don't know how to do that unless the phone is shut down, and doing the volume/power button combination)
i'm really stuck here and don't know what to do, i'd really appreciate your help guy
PS: sorry for the English, that was the best i could do
EDIT : i managed to get into fastboot mode,yeeeey! (see the 4th attachement)
how did you get into fastboot mode
i am not able to do it

Need help with my soft-bricked LG l90

I'll get straight to the point, yesterday I went and re-rooted my phone with Kingroot (I had already rooted it once with Kingroot) to try something called Magisk, and basically what happened is that I installed Magisk manager and selected the 3rd option to install it (can't remember the details), I am new at this sort of stuff but I knew it would be risky without some sort of recovery mode installed.
Next thing I know the phone shows the LG logo like normal but with an error message on the up left corner of the phone saying:
"ERROR: boot certification verify
[880]--------------------------------------------
[880]
[880] Secure booting error!
[880] Cause: Boot certification verify
[880]
[880]--------------------------------------------"
And then the screen goes black it doesn't really shut down because it takes me about 10 seconds of holding the power key which is force reboot instead of the 2-3 second hold.
I've been trying to get solutions for this around the forums but nothing works as I don't know my exact model number.
I would appreciate some help and thanks in advance!

LG G3 Restart and Shut down automatically.

I have LG G3 (D855) and running stock firmware, Someday back my phone start showing invalid sim then i tried same sim with different phone and its working. Now i know there is some fault in phone, i was keep trying then after few minutes my phone restart with awkward loud beat and then shut down/restart to boot. To boot i need to take out battery but it still restart or shut down automatically.
I flashed my phone to stock KDZ successfully but still i am facing same issue. My screen sometimes stuck to LG logo or LG logo disappears and shut down (Need to take out battery to start my phone again), Boot sometimes to home screen then turn off. I flashed to D85530e_00_0927.kdz , which is stock i was using before any issue in my phone.
Please help me to fix my phone
Video: http://www.dailymotion.com/video/x6glqbb

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