I flashed TRWP and then flased a rom on LG F240L. But after reboot the phone stucks on LG screen and message shows secure booting error! cause：boot certification verify.
TO unbrick it using kdz, I can enter download mode but USB device is not recognized in Windows, although I have LG drivers installed. It appears as unknown device,
EDIT: I managed to enter TWRP recovery and flashed another working ROM. Phone is back
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People make this out to be way worse than what it is and you can't really find all of the information that you need in one location. I tried without success unbrick method after unbrick method. I was in the process of creating a Virtual PC to load Umbutu. Don't waste your time. It's not necessary.
In my case, I tried loading multiple drivers with no success in detecting with Windows 7 and all that my phone would do is boot to the LG Splash Screen. I could boot to Recovery Mode with the usb unplugged and holding the vol down + power and I could get to download mode using volume up and plugging in the usb, but neither gave me drivers.
Install LG Driver Package
-Device Manager was showing ls980 under unknown devices. I updated the driver and chose the adb interface and unchecked the option to only view compatible devices. I then chose the Androidnet sooner device.
Reboot your computer
Put phone into download mode - Windows should detect and install the device
If you aren using twrp 2.6.3.2, user "adb push ls980-twrp-2634recovery.zip /sdcard"
wipe system data and cache
Sideload custom ROM and and Modem in the same session
Reboot device
I used Optimus DE v3.2
hope this helps
Phone hardbricked after following "[Solved] Secure Boot Error" thread. What do I do?
I followed the one click root method, which worked out well. After that, I installed su, flashify, and twrp. I then tried installing a custom rom, but upon booting into recovery mode, I received the Secure Boot Error text. It wasn't too big of a deal since I could still take out the battery, put it back in, and boot normally.
But, after seeing this thread:
http://forum.xda-developers.com/lg-g3/help/help-secure-boot-error-trying-to-boot-t3054977
and how simple the instructions were, I proceeded to give it a shot. I entered in the 4 commands, powered off my phone, and attempted to boot into recovery mode. But unlike before when I booted into recovery mode, nothing appeared. No lg logo, backlight power, nothing. It's acting as it would if nothing was powering it. Now I'm stuck with a bricked phone, and sincerely need some advice on where to proceed next. Could someone help me?
Oh, btw, when I plug the phone the computer, I do "the device was successfully installed" message. The phone appears in device manager, under Ports as LGE AndroidNet USB Serial Port or as LG AndroidNet Phone under devices and printers. It doesn't appear under This PC at all.
probably one of the core system partitions has a version mismatch which is the reason why your phone isnt turning on because the partition wasnt written correctly
you need to kick it into Qualcomm USB HS Loader 9008 by shorting out the testpoint, other than that your phone is gone
Help please..My Lg G4 H815 is stuck on infinite loop since yesterday..
Just shord to be in words...My phone was stuck on lg logo after the battery whrn dead and then boots up and on the type the pin he restarted over and over, and i tried to reflash with LGUP and at 17% my phone restarted just like that..
Since then my phone is hanging on Secure booting error! Error code 1014.
What can i do..I got no warranty!
PS: I can't enter download mode (only shows Download mode and the the error and restarts)
I can't enter recovery(stock one) but when i him yes the second time to erase the error shows up and restarts.
Use the search option. Not for me and not for anyone else but to help yourself as fast as possible. You'll also learn stuff.
XDA user roopesh had the same problem: http://forum.xda-developers.com//g4/development/stock-h815-20a-stock-rom-t3233049/post63721579
He/she fixed their problem by following this guide: http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Or follow my guide:
i) Make sure you have the LG Drivers installed from here: http://oceanhost.eu/e4h2px4e0hkd/LGMobileDriver_WHQL_Ver_4.0.4.exe.htm
ii) Download the LG Bridge software from here: http://www.lg.com/us/support/product-help/CT10000025-1438110404543-preinstall-apps
iii) Remove the battery and reinsert it so the device it is fully off.
iv) While holding the up volume button, insert your USB cable.
v) You should enter download mode. Go to the Software Update tab of the LG Bridge. It will say connecting and then should say your device is up to date. Click on the recovery text on the bottom right and then follow the instructions. The software will download the system image for you and this is roughly 1.6GB so make sure your firewall doesn't block this connection.
I've searched everywhere i think..before i posted the question
The phone wont stay in download mode....
It shows the little box with download and then the error i mentionet above and restarts..
And means SEA mobile?
hey alex have you fixed your g4 ? i have same problem.
LG Pad Verizon 10.1 VK700
My tablet was stuck in upgrading firmware mode whenever I booted it up. Used LG tool to flash stock firmware, and it would hang at 28%.
Went into recovery mode and clicked wipe cache, and when I rebooted it now says
boot certification verify and the top left with the LG logo and it hangs here.
Can no longer enter download mode to reflash.
Recovery mode still works, but none of the options work
*Wipe cache (top of screen will say boot certification verify and hang)
*Restore factory defaults (will hang at Restoring Factory Settings)
*Safe mode (reboots to boot certification verify and LG logo)
Figured I could try to use SRK tools, but nothing comes up in my Device manager when I plug it in anymore (not even qhsusb_bulk)
When I power it off and on with usb plugged in, windows will occasionally make the new device detected sound, but then make the device disconnected sound about a second later, so nothing will appear in device manager.
Does anybody have any suggestions or any way I can get this thing running again? Or anyway I can get my computer to even recongnize it as qhsusb_bulk so I can use SRK tools?
I was using a D850 on Fulmics 7.6. This morning, my phone crashed unexpectedly. Tried to restart it, but it will stay on for a minute, then dies again. Tried to go into recovery to reflash Fulmics but again: on for a minute, crash. Someone suggested trying Lineage OS, but that one keeps getting errors mounting the SD card and whatnot. Tried to wipe all partitions and try again, still nothing. Tried to go back to stock, successfully got into download mode and started LG Flash tools, but I get a Download Failed error. After that, download mode wouldn't work anymore. Tried using Androidbrick G3 unbrick, and was able to get Download Mode to work again (goes to the firmware update page), but still LG Flash tools failed again, and now it won't go back into Download Mode. Should I throw in the towel at this point?
When I do plug it into the computer, I do see the Download Mode screen, but then the display turns off and in my device manager, the phone is a Qualcomm hub 9008 or something like that.