Develop Bugs

Lg Optimus G pro E988 Doesn't BOOT (maybe bricked)

Hi there, I recently bought an used unlocked LG G PRO E988 (made in korea) version. I rooted it. I tried to flash a custom rom but got stuck in boot loop with a security warning saying "SECURE booting ERROR!! Cause: boot certification verify" But while booting if I kept the volume up and power botton pressed it would give me "SECURE booting ERROR!! Device is unlocked so booting success" , However i could not get into the download mode no matter which ever key combination i tried. Finally pressing the volume up ,home key and power botton at the same time while putting back the battery on i ran into recovery mode and flashed a new rom "sphinx" and it was working fine, though I kept getting the "SECURE booting ERROR!! Device is unlocked so booting success" while booting up. I installed the Philz touch recovery while installing sphinx rom but day before yesterday I wanted to install the default cwm recovery and flash sphinx again with less apps,so from the recovery mode i wiped dev cache,wiped cache partion (and i think i wiped data/factory reset as well ) installed the sphinx rom again and rebooted from sphinx installation screen where i need to check a sqaure box to reboot. but my phone got stuck in boot loop again and with the same security warning "SECURE booting ERROR!! Cause: boot certification verify" but this time pressing the volume up and power button while connecting usb or putting back the battery didn't change the security warning to "SECURE booting ERROR!! Device is unlocked so booting success" neither could i get into my recovery mode. And i have always failed to log into download mode. I read almost all the threads about how to get into g pro download mode but never succeed. The only screen i was getting besides "hard reset" and "boot logo with security warning" was a screen with this message "Recovery mode,Using this mode, service center can back up and recover your data. Press and hold the POWER key more than 8 seconds to reboot and continue using phone." which would eventually take me to the boot loop again if i kept pressing the power button. sigh ! And at this point my phone was not being detected by my pc. I tried "[GUIDE] Optimus G Pro Full Hard Brick fix" by ricanares, but i couldnt get to download mode so the process failed for me After searching for hours and reading tutorials i found out about pdanet drivers and mtk droid tools. which finally detected my phone in pc only when the creen " Recovery mode,Using this mode, service center can back up and recover your data. Press and hold the POWER key more than 8 seconds to reboot and continue using phone." appears. Using mtk droid tools i tried to use a boot image (from an extracted .tot file)and recovery(from same .tot file) but i was getting an error saying no split boot image found.Tried using extracting a .tot file and sideloading the recovery.bin and boot.bin .Tried pushin and sideloading cusom recovery.apk files and all efforts in vein. For any files i send using sideload my phone shows an error "E:footer is wrong ; E: signature verification failed" Using mtk droid tools i could enter into a recovery mode but i dont think it is the cwm recovery mode. it has fewer options. I am so lost at this point ! I need some expert help ...
Things working
1. Boots into stock recovery using mtk tools.
2. Pc recognizes device as LG Android net phone
3.Mtk tools recognizes the device as LG E988
4.Can use adb sideload options to send files to phone in recovery mode (but phone outputs error as 1st attached image )
5.In recovery mode I can see and go into /cache folder using update from cache option.but theres nothing there
THINGS NOT WORKING
1.Doesnt Boot into recovery mode using physical buttons
2.Doesnt Boot into download mode
3.Cant get into fastboot mode with adb commands
4.Doesnt mount sd card .(tried formatting sd card with sdformatter)
5.Don't have a proper backup of my phone.
6.Can't extract downloaded .kdz files to get the boot.img and recovery.img files (tried using lg p970 rom converter, optimus L9 image extractor and lg extract)
HELP
1) Does anyone have extracted .kdz for e988 that has split boot image ?
2)How can i fix E:failed to mount /sdcard error.
3)How do i get to download mode in e988 ? is it possible that i deleted the mode ?

sd091989 said:
Hi there, I recently bought an used unlocked LG G PRO E988 (made in korea) version. I rooted it. I tried to flash a custom rom but got stuck in boot loop with a security warning saying "SECURE booting ERROR!! Cause: boot certification verify" But while booting if I kept the volume up and power botton pressed it would give me "SECURE booting ERROR!! Device is unlocked so booting success" , However i could not get into the download mode no matter which ever key combination i tried. Finally pressing the volume up ,home key and power botton at the same time while putting back the battery on i ran into recovery mode and flashed a new rom "sphinx" and it was working fine, though I kept getting the "SECURE booting ERROR!! Device is unlocked so booting success" while booting up. I installed the Philz touch recovery while installing sphinx rom but day before yesterday I wanted to install the default cwm recovery and flash sphinx again with less apps,so from the recovery mode i wiped dev cache,wiped cache partion (and i think i wiped data/factory reset as well ) installed the sphinx rom again and rebooted from sphinx installation screen where i need to check a sqaure box to reboot. but my phone got stuck in boot loop again and with the same security warning "SECURE booting ERROR!! Cause: boot certification verify" but this time pressing the volume up and power button while connecting usb or putting back the battery didn't change the security warning to "SECURE booting ERROR!! Device is unlocked so booting success" neither could i get into my recovery mode. And i have always failed to log into download mode. I read almost all the threads about how to get into g pro download mode but never succeed. The only screen i was getting besides "hard reset" and "boot logo with security warning" was a screen with this message "Recovery mode,Using this mode, service center can back up and recover your data. Press and hold the POWER key more than 8 seconds to reboot and continue using phone." which would eventually take me to the boot loop again if i kept pressing the power button. sigh ! And at this point my phone was not being detected by my pc. I tried "[GUIDE] Optimus G Pro Full Hard Brick fix" by ricanares, but i couldnt get to download mode so the process failed for me After searching for hours and reading tutorials i found out about pdanet drivers and mtk droid tools. which finally detected my phone in pc only when the creen " Recovery mode,Using this mode, service center can back up and recover your data. Press and hold the POWER key more than 8 seconds to reboot and continue using phone." appears. Using mtk droid tools i tried to use a boot image (from an extracted .tot file)and recovery(from same .tot file) but i was getting an error saying no split boot image found.Tried using extracting a .tot file and sideloading the recovery.bin and boot.bin .Tried pushin and sideloading cusom recovery.apk files and all efforts in vein. For any files i send using sideload my phone shows an error "E:footer is wrong ; E: signature verification failed" Using mtk droid tools i could enter into a recovery mode but i dont think it is the cwm recovery mode. it has fewer options. I am so lost at this point ! I need some expert help ...
1) Does anyone have an original .kdz file for e988 (i believe its E98820b_00.kdz) or extracted .kdz that has split boot image ?
2)How can i fix E:failed to mount /sdcard error.
3)How do i get to download mode in e988 ? is it possible that i deleted the mode ?
Click to expand...
Click to collapse
"However i could not get into the download mode no matter which ever key combination i tried."
Have you tried:
1) remove battery
2) hold down both volume buttons and power button
3) insert power cord while keeping buttons held down
4) download mode is yours to cherish??
And for once you get into download mode: your KDZ! (or more here)
From there to go here and do more things. Things cannot be left undone. They hate that.
" SECURE booting ERROR!! Device is unlocked so booting success"
This is normal once you install a custom recovery. As long as your phone works, ignore.

culot said:
"However i could not get into the download mode no matter which ever key combination i tried."
Have you tried:
1) remove battery
2) hold down both volume buttons and power button
3) insert power cord while keeping buttons held down
4) download mode is yours to cherish??
And for once you get into download mode: your KDZ! (or more here)
From there to go here and do more things. Things cannot be left undone. They hate that.
" SECURE booting ERROR!! Device is unlocked so booting success"
This is normal once you install a custom recovery. As long as your phone works, ignore.
Click to expand...
Click to collapse
Thanks for your response. Yes i tried that but didn't work. I tried with and without battery both. actually tried numerous times.Only the soft keys keep flashing and nothing else happen. But i will give it a shot again. Plus the secure booting error has changed to "SECURE booting ERROR!! Cause: boot certification verify"-- is it just because I am back to stock recovery ? If only i could get into download mode life would have been a lot easier !! (finger crossed)

sd091989 said:
Thanks for your response. Yes i tried that but didn't work. I tried with and without battery both. actually tried numerous times.Only the soft keys keep flashing and nothing else happen. But i will give it a shot again. Plus the secure booting error has changed to "SECURE booting ERROR!! Cause: boot certification verify"-- is it just because I am back to stock recovery ? If only i could get into download mode life would have been a lot easier !! (finger crossed)
Click to expand...
Click to collapse
Still boned? The LG Support Tool worked for me once, when I was in a similar situation way back last month when I first began smartphoning.
I was in this *exact* same situation after trying to flash my first ROMs and recovery stuff, but I don't remember how I got out of it. :| ACk!

Yupp still stuck . Will try again later tonigh. Didn't get a chance to sit with it the whole day. Hoping for the best !!

sd091989 said:
Yupp still stuck . Will try again later tonigh. Didn't get a chance to sit with it the whole day. Hoping for the best !!
Click to expand...
Click to collapse
Oh! One thing to remember: always plug your USB cable directly into your computers motherboard USB ports, and avoid plugging into USB hub ports (like via a monitor or keyboard). If a desktop: that also means don't use the ports on your computer system. always use the rear ports that plug directly into your motherboard.
(A couple of times I was able to flash a stock TOT/KDZ via the USB hub on my monitor, but that is not a feat that is repeatable for me.)
This makes *all* the difference for me.

culot said:
Oh! One thing to remember: always plug your USB cable directly into your computers motherboard USB ports, and avoid plugging into USB hub ports (like via a monitor or keyboard). If a desktop: that also means don't use the ports on your computer system. always use the rear ports that plug directly into your motherboard.
(A couple of times I was able to flash a stock TOT/KDZ via the USB hub on my monitor, but that is not a feat that is repeatable for me.)
This makes *all* the difference for me.
Click to expand...
Click to collapse
Hey ,thanks for the tip. I am using the mobo usb ports. So today i was able to flash pacman rom (its the only one that i can flash in adb sideload actually... couldnt flash the stock rom for signaature error and footer is wrong error) But now getting this new error "assert failed run_program("/system/bin/loki.sh") ==0 )"
E: Error in /tmp/update.zip
(status 7)
p.s- my android version got updated to 4.4.4 in the process !
I feel i am getting close to retrieve my phone back to normal ; yet so far. :S

sd091989 said:
Hey ,thanks for the tip. I am using the mobo usb ports. So today i was able to flash pacman rom (its the only one that i can flash in adb sideload actually... couldnt flash the stock rom for signaature error and footer is wrong error) But now getting this new error "assert failed run_program("/system/bin/loki.sh") ==0 )"
E: Error in /tmp/update.zip
(status 7)
p.s- my android version got updated to 4.4.4 in the process !
I feel i am getting close to retrieve my phone back to normal ; yet so far. :S
Click to expand...
Click to collapse
my phone can get into download mode but stuck at boot loop, i cant use lg tool to recover cuz it says my battery is empty but it is fully charged :/
kdz tool aint working cuz it keeps aborting :/

bagslayer said:
my phone can get into download mode but stuck at boot loop, i cant use lg tool to recover cuz it says my battery is empty but it is fully charged :/
kdz tool aint working cuz it keeps aborting :/
Click to expand...
Click to collapse
How do you get into download mode ?

sd091989 said:
Hey ,thanks for the tip. I am using the mobo usb ports. So today i was able to flash pacman rom (its the only one that i can flash in adb sideload actually... couldnt flash the stock rom for signaature error and footer is wrong error) But now getting this new error "assert failed run_program("/system/bin/loki.sh") ==0 )"
E: Error in /tmp/update.zip
(status 7)
p.s- my android version got updated to 4.4.4 in the process !
I feel i am getting close to retrieve my phone back to normal ; yet so far. :S
Click to expand...
Click to collapse
The Why: You can't flash that via the stock recovery. You need to use FreeGee to flash CWM or TWRP.
You can get your system into stock recovery: this is good! Does ADB recognize? If not check Windows drivers. If ADB recognizes it, and you can 'adb shell' into it, maybe I could walk you into rooting and installing a custom recovery via the shell?
1) If not already, have ADB at hand. It is your best friend.
---------- Post added at 06:58 PM ---------- Previous post was at 06:56 PM ----------
bagslayer said:
my phone can get into download mode but stuck at boot loop, i cant use lg tool to recover cuz it says my battery is empty but it is fully charged :/
kdz tool aint working cuz it keeps aborting :/
Click to expand...
Click to collapse
LGFlashtool.exe says battery is empty?

culot said:
The Why: You can't flash that via the stock recovery. You need to use FreeGee to flash CWM or TWRP.
You can get your system into stock recovery: this is good! Does ADB recognize? If not check Windows drivers. If ADB recognizes it, and you can 'adb shell' into it, maybe I could walk you into rooting and installing a custom recovery via the shell?
1) If not already, have ADB at hand. It is your best friend.
---------- Post added at 06:58 PM ---------- Previous post was at 06:56 PM ----------
LGFlashtool.exe says battery is empty?
Click to expand...
Click to collapse
LG Mobile Support tool says battery is empty

bagslayer said:
LG Mobile Support tool says battery is empty
Click to expand...
Click to collapse
Dude, you are so in the wrong program:
LG Flash Tool 1.8 -- this is what handles your TOTs.
Err, wait, you're on E988? Nevermind, no TOTs for you. I've only flashed KDZ a few times, and I don't recall off hand. :| I think it was this one that worked for me: here.

culot said:
The Why: You can't flash that via the stock recovery. You need to use FreeGee to flash CWM or TWRP.
You can get your system into stock recovery: this is good! Does ADB recognize? If not check Windows drivers. If ADB recognizes it, and you can 'adb shell' into it, maybe I could walk you into rooting and installing a custom recovery via the shell?
Yes I can actually get into shell using adb. and my device is recognized as an adb device in device manager. If u can walk me into rooting through adb that would be awesome. specially if i could install a cusom recovery. I spent a bit of time yesterday looking into the files in my phone through adb. tried to change the default.prop file , and push in a custom recovery, but no luck. and i could be wrong but I think for some reason my internal storage (/sdcard) is not being mounted.and same for my external sd card.
But i highly appreciate your response dear Thanks alot for looking into it.
Click to expand...
Click to collapse

culot said:
Dude, you are so in the wrong program:
LG Flash Tool 1.8 -- this is what handles your TOTs.
Err, wait, you're on E988? Nevermind, no TOTs for you. I've only flashed KDZ a few times, and I don't recall off hand. :| I think it was this one that worked for me: here.
Click to expand...
Click to collapse
Yes I can actually get into shell using adb. and my device is recognized as an adb device in device manager. If u can walk me into rooting through adb that would be awesome. specially if i could install a cusom recovery. I spent a bit of time yesterday looking into the files in my phone through adb. tried to change the default.prop file , and push in a custom recovery, but no luck. and i could be wrong but I think for some reason my internal storage (/sdcard) is not being mounted.and same for my external sd card.
But i highly appreciate your response dear Thanks alot for looking into it.

SO after trying to install the root.zip I tried running nifty.bat . And this is the error i get.

culot said:
The Why: You can't flash that via the stock recovery. You need to use FreeGee to flash CWM or TWRP.
You can get your system into stock recovery: this is good! Does ADB recognize? If not check Windows drivers. If ADB recognizes it, and you can 'adb shell' into it, maybe I could walk you into rooting and installing a custom recovery via the shell?
1) If not already, have ADB at hand. It is your best friend.
---------- Post added at 06:58 PM ---------- Previous post was at 06:56 PM ----------
LGFlashtool.exe says battery is empty?
Click to expand...
Click to collapse
culot said:
Dude, you are so in the wrong program:
LG Flash Tool 1.8 -- this is what handles your TOTs.
Err, wait, you're on E988? Nevermind, no TOTs for you. I've only flashed KDZ a few times, and I don't recall off hand. :| I think it was this one that worked for me: here.
Click to expand...
Click to collapse
sd091989 said:
SO after trying to install the root.zip I tried running nifty.bat . And this is the error i get.
Click to expand...
Click to collapse
wow that is such a mean one :C "It doesnt work so we never met okay?" srsly who would do that >.>

bagslayer said:
wow that is such a mean one :C "It doesnt work so we never met okay?" srsly who would do that >.>
Click to expand...
Click to collapse
No doubt, what kind of jerkoff would do that!

[Q] Phone soft bricked? Unable to used ADB or Memory Card

Hello everyone,
I got my AT&T HTC M9 yesterday with 1.32.502.9. I unlocked the bootloader and installed TWRP successfully. I tried Installing Android Revolution 4.1 and didn't noticed the installation failed. When I restarted the phone it got stuck on the HTC logo. Someone after messing with the phone I ended up loosing TWRP and I'm back to the stock recovery with only these options:
reboot system now
apply updates from ADB
wipe data/fatory reset
wipe cache partition
reboot to bootloader
power down
view recovery logs
apply from phone storage
apply from sd card
My phone is stuck at the logo screen and I cannot sideload or flash anything from the SD memory card or phone storage. My phone gives me an error when I try to flash from the SD card and my computer now does not detect my M9 (all drivers were installed previously as well as the SDK)
I don't want to do anything else yet because I'm afraid I will make things worse. Could any body advice me on how to fix my phone?
Thank you!

I was able to fix it.
Admin: Please delete this thread. Thank you!

tchan said:
I was able to fix it.
Admin: Please delete this thread. Thank you!
Click to expand...
Click to collapse
@tchan how did you fix it? I am in the same situation myself.

MightyRaith said:
@tchan how did you fix it? I am in the same situation myself.
Click to expand...
Click to collapse
You have to switch to the download mode on your M9 and use the fastboot command to flash a custom recovery (TWRP2050 worked for me). Make sure your SDK is up to date and you download and install all the HTC drivers for the M9.
This might help: http://forum.xda-developers.com/one-m9/general/guide-root-install-twrp-htc-one-m9-t3061133

tchan said:
You have to switch to the download mode on your M9 and use the fastboot command to flash a custom recovery (TWRP2050 worked for me). Make sure your SDK is up to date and you download and install all the HTC drivers for the M9.
This might help: http://forum.xda-developers.com/one-m9/general/guide-root-install-twrp-htc-one-m9-t3061133
Click to expand...
Click to collapse
Sadly I cannot enter download mode or recovery mode the phone simply reboots I had TWRP installed with LeeDroid and everything was peachy now I can't do a single thing with it lol.

MightyRaith said:
Sadly I cannot enter download mode or recovery mode the phone simply reboots I had TWRP installed with LeeDroid and everything was peachy now I can't do a single thing with it lol.
Click to expand...
Click to collapse
Shut the phone off,wait 10 seconds then hold volume down and start button. After a few seconds, it wil vibrate, release the buttons and it should start in donwload mode (black background).

MightyRaith said:
Sadly I cannot enter download mode or recovery mode the phone simply reboots I had TWRP installed with LeeDroid and everything was peachy now I can't do a single thing with it lol.
Click to expand...
Click to collapse
Turn on you phone and wait about 10 seconds after seeing the HTC logo. Hold down the volume up button and power button for a few seconds until the phone vibrates, as soon as that happens switch to the volume down button and power button that should put the phone in "download mode." Connect your phone to your PC. On your command prompt you can type "fastboot devices" to check and make sure your phone is good to go. After that, you should be able to flash TWRP which in turn would allow you to flash a custom rom and fix your phone.

tchan said:
Hello everyone,
I got my AT&T HTC M9 yesterday with 1.32.502.9. I unlocked the bootloader and installed TWRP successfully. I tried Installing Android Revolution 4.1 and didn't noticed the installation failed. When I restarted the phone it got stuck on the HTC logo. Someone after messing with the phone I ended up loosing TWRP and I'm back to the stock recovery with only these options:
reboot system now
apply updates from ADB
wipe data/fatory reset
wipe cache partition
reboot to bootloader
power down
view recovery logs
apply from phone storage
apply from sd card
My phone is stuck at the logo screen and I cannot sideload or flash anything from the SD memory card or phone storage. My phone gives me an error when I try to flash from the SD card and my computer now does not detect my M9 (all drivers were installed previously as well as the SDK)
I don't want to do anything else yet because I'm afraid I will make things worse. Could any body advice me on how to fix my phone?
Thank you!
Click to expand...
Click to collapse
please be patient
I don`t have m9 now but if you do this solution,maybe your phone boot up again ( this solution works on m8 )
I don`t think your phone bricked or damaged memory
you can do this solution,maybe your phone fixed !
1- charge your phone then update the htc usb driver and adb tools
2- then boot to the bootloader and flash the latest twrp recovery again ( don`t forgot do erase cache)
3- download other rom like viper rom then copy it on the flash memory ( to install rom with otg cable and flash memory)
4-do full wipe ( internal and external memory - system - cache - dalvik cache)
5- install rom from flash memory and do full wipe again in aroma installer
6- then restart your phone and wait to phone boot up again
7- if don`t boot up,go to the bootloader and flash boot.img from rom ( you should extract rom to see it )
after all you can s-off your phone if you like
good work:good:

my_android said:
please be patient
I don`t have m9 now but if you do this solution,maybe your phone boot up again ( this solution works on m8 )
I don`t think your phone bricked or damaged memory
you can do this solution,maybe your phone fixed !
1- charge your phone then update the htc usb driver and adb tools
2- then boot to the bootloader and flash the latest twrp recovery again ( don`t forgot do erase cache)
3- download other rom like viper rom then copy it on the flash memory ( to install rom with otg cable and flash memory)
4-do full wipe ( internal and external memory - system - cache - dalvik cache)
5- install rom from flash memory and do full wipe again in aroma installer
6- then restart your phone and wait to phone boot up again
7- if don`t boot up,go to the bootloader and flash boot.img from rom ( you should extract rom to see it )
after all you can s-off your phone if you like
good work:good:
Click to expand...
Click to collapse
Thanks for replying but I was able to fix my phone a few hours after. Those are the right steps but you're missing some details. HTC has now changed things a bit and added the "download mode." Flashing in bootloader does not work any more.

Glad your all sorted !

Me 2 help !!!!
tchan said:
Hello everyone,
I got my AT&T HTC M9 yesterday with 1.32.502.9. I unlocked the bootloader and installed TWRP successfully. I tried Installing Android Revolution 4.1 and didn't noticed the installation failed. When I restarted the phone it got stuck on the HTC logo. Someone after messing with the phone I ended up loosing TWRP and I'm back to the stock recovery with only these options:
reboot system now
apply updates from ADB
wipe data/fatory reset
wipe cache partition
reboot to bootloader
power down
view recovery logs
apply from phone storage
apply from sd card
My phone is stuck at the logo screen and I cannot sideload or flash anything from the SD memory card or phone storage. My phone gives me an error when I try to flash from the SD card and my computer now does not detect my M9 (all drivers were installed previously as well as the SDK)
I don't want to do anything else yet because I'm afraid I will make things worse. Could any body advice me on how to fix my phone?
Thank you!
Click to expand...
Click to collapse
Everytime i try to send commands its does not respond , adb devices=NOTHING adb get-state=NOTHING
what did u flash ? When i reboot it only shows a red triangle with a exclamation point and now my computer does not detect my m9
Also have tried to start the RUU from the htc website with no luck it only goes as far a the accept licseing

May be you have to update adb/fastboot or your Htc's drivers...

tchan said:
Hello everyone,
I got my AT&T HTC M9 yesterday with 1.32.502.9. I unlocked the bootloader and installed TWRP successfully. I tried Installing Android Revolution 4.1 and didn't noticed the installation failed. When I restarted the phone it got stuck on the HTC logo. Someone after messing with the phone I ended up loosing TWRP and I'm back to the stock recovery with only these options:
reboot system now
apply updates from ADB
wipe data/fatory reset
wipe cache partition
reboot to bootloader
power down
view recovery logs
apply from phone storage
apply from sd card
My phone is stuck at the logo screen and I cannot sideload or flash anything from the SD memory card or phone storage. My phone gives me an error when I try to flash from the SD card and my computer now does not detect my M9 (all drivers were installed previously as well as the SDK)
I don't want to do anything else yet because I'm afraid I will make things worse. Could any body advice me on how to fix my phone?
Thank you!
Click to expand...
Click to collapse
I cant enter recovery mood or download mode adb is not reconized i even tryed adb get-state and nothing shows up
tried to sideload and when its done is say e:veracation failed then show this screen again

You're best sending it to htc.
Sent from my HTC One M9 using Tapatalk

Deleted OS,phone stuck at home screen,no access to bootloader

I rooted my phone. But accidentally deleted my OS. Before flashing with a new ROM, i wiped off the cache/system/Dalvik cache.
When i tried flashing my device, i got some failure. So, i tried to reboot my device.
But, now i am not able to get into bootloader mode. The device is stuck at home screen with HTC logo and is unresponsive. Nor the power button is working to shut it off. I have to wait to get the battery drained.
Also, Vol Dwn+Power is not working to move it to Fastboot mode, so dat i can recover with my TWRP backup.
Also, i have seen that when the device is powered off, i can access the storage using USB, but can't access it when it is powered ON.
I thought of trying flashing RUU but for that i guess i need USB access to device while it is powered ON.
Please suggest me how to resolve this issue.
Thanks in advance

GeekyNitish said:
I rooted my phone. But accidentally deleted my OS. Before flashing with a new ROM, i wiped off the cache/system/Dalvik cache.
When i tried flashing my device, i got some failure. So, i tried to reboot my device.
But, now i am not able to get into bootloader mode. The device is stuck at home screen with HTC logo and is unresponsive. Nor the power button is working to shut it off. I have to wait to get the battery drained.
Also, Vol Dwn+Power is not working to move it to Fastboot mode, so dat i can recover with my TWRP backup.
Also, i have seen that when the device is powered off, i can access the storage using USB, but can't access it when it is powered ON.
I thought of trying flashing RUU but for that i guess i need USB access to device while it is powered ON.
Please suggest me how to resolve this issue.
Thanks in advance
Click to expand...
Click to collapse
Hi Guys,
I sorted out the issue. Thanks to various information available which i need to put in together to fix.
FIrst of all, the good thing is that i had the TWRP recovery.
I was able to move into Fastboot mode once the device is switched off.
Steps i followed::
1) Place the TWRP backup in the sd card in the proper directory structure.
TWRP -> BACKUPS-> [phone's serial number] -> ROMName
2) Volume up+power button to shut it off.
3) Volume Down+power button to move to Fastboot mode.
4) Select Recovery. You will be moved to TWRP manager.
5) Select Restore there and select the proper recovery folder which u had copied in the sd card.
6) You are done!! BINGO
For those who don't have TWRP backup, they can flash it with a proper ROM available by simply placing the ROM zip in the sd card, wipe the cache from TWRP manager. Select Install from TWRP manager and select the ROM zip and you are done flashing with the new ROM.

Bricked D855 - LED flashing red & blue

Hello, guys!
I stupidly bricked my D855 trying to install CM 13.
It was on Stock Lollipop.
Now it only flashes red and blue led. No system and no recovery.
This is exactly what I did:
1. root
2. install TWRP 3.0.0.0
3. reboot to Recovery mode
4. completely format all partitions
5. upload CM13.zip and Gapps.zip
6. try to flash CM13
Here I got an error about the Baseband version and the flash did not started.
It was version 20B I guess.
7. Search Google about the error and found an update to version 30B
8. Download the firmware.zip and upload to phone
9. Flash firmware.zip
10. reboot
This is where I got stuck.
I thought it would boot to recovery again, but it is completely dead.
When I power the phone on, I can see the LG logo with this error at the top left:
ERROR : boot certification verify
[660] ------------------
[660] Secure booting Error!
[660] Cause : Boot certification verify
[660] -----------------
And then the screen turns off and the led flashes red and blue.
If I try to push Power and Volume Down, I got the same thing.
If I try to push Power and Volume Up, the screen turns off, but the led don't flash.
If I push only Volume Down the phone reboots to the LG logo.
LG Flash Tool does not detect the phone.
I've searched on Google, YouTube and here on XDA and did not found anything.
It was stupid to format all partitions, I know.
Is there a way to recover the phone or I should buy another one?
Thank you very much for the help.

Hi, guys,
Download Mode still works.
Using LG Tool, the KDZ method did not work, but looks like the TOT+DLL mode works.
Unfortunately, I could not find the files for my specific model D855P.
The tool recognizes the phone at COM41, but the files for D855 are not suitable.
Anybody know where I can find the TOT and DLL?
Thank you!!!

gabu8balls said:
Hello, guys!
I stupidly bricked my D855 trying to install CM 13.
It was on Stock Lollipop.
Now it only flashes red and blue led. No system and no recovery.
This is exactly what I did:
1. root
2. install TWRP 3.0.0.0
3. reboot to Recovery mode
4. completely format all partitions
5. upload CM13.zip and Gapps.zip
6. try to flash CM13
Here I got an error about the Baseband version and the flash did not started.
It was version 20B I guess.
7. Search Google about the error and found an update to version 30B
8. Download the firmware.zip and upload to phone
9. Flash firmware.zip
10. reboot
This is where I got stuck.
I thought it would boot to recovery again, but it is completely dead.
When I power the phone on, I can see the LG logo with this error at the top left:
ERROR : boot certification verify
[660] ------------------
[660] Secure booting Error!
[660] Cause : Boot certification verify
[660] -----------------
And then the screen turns off and the led flashes red and blue.
If I try to push Power and Volume Down, I got the same thing.
If I try to push Power and Volume Up, the screen turns off, but the led don't flash.
If I push only Volume Down the phone reboots to the LG logo.
LG Flash Tool does not detect the phone.
I've searched on Google, YouTube and here on XDA and did not found anything.
It was stupid to format all partitions, I know.
Is there a way to recover the phone or I should buy another one?
Thank you very much for the help.
Click to expand...
Click to collapse
http://bbs.gaodi.net/forum.php?mod=viewthread&tid=668394
Visit this site. Hope, you can find something for your device.
---------- Post added at 04:39 PM ---------- Previous post was at 04:38 PM ----------
gabu8balls said:
Hello, guys!
I stupidly bricked my D855 trying to install CM 13.
It was on Stock Lollipop.
Now it only flashes red and blue led. No system and no recovery.
This is exactly what I did:
1. root
2. install TWRP 3.0.0.0
3. reboot to Recovery mode
4. completely format all partitions
5. upload CM13.zip and Gapps.zip
6. try to flash CM13
Here I got an error about the Baseband version and the flash did not started.
It was version 20B I guess.
7. Search Google about the error and found an update to version 30B
8. Download the firmware.zip and upload to phone
9. Flash firmware.zip
10. reboot
This is where I got stuck.
I thought it would boot to recovery again, but it is completely dead.
When I power the phone on, I can see the LG logo with this error at the top left:
ERROR : boot certification verify
[660] ------------------
[660] Secure booting Error!
[660] Cause : Boot certification verify
[660] -----------------
And then the screen turns off and the led flashes red and blue.
If I try to push Power and Volume Down, I got the same thing.
If I try to push Power and Volume Up, the screen turns off, but the led don't flash.
If I push only Volume Down the phone reboots to the LG logo.
LG Flash Tool does not detect the phone.
I've searched on Google, YouTube and here on XDA and did not found anything.
It was stupid to format all partitions, I know.
Is there a way to recover the phone or I should buy another one?
Thank you very much for the help.
Click to expand...
Click to collapse
It's a google search for your required firmware. Try it.
https://www.google.com.pk/search?q=...rome..69i57&sourceid=chrome&es_sm=93&ie=UTF-8

Thank you very much for the help.
Unfortunately I did not found the correct TOT and DLL for D855P, but the KDZ file worked.
I changed the Mode option on LG Flash Tool from DIAG to Emergency and the flash did the trick.
Now I'll try to upgrade to stock 6.0, root, install TWRP and than CM13.
Thanks, guys.

gabu8balls said:
Hello, guys!
I stupidly bricked my D855 trying to install CM 13.
It was on Stock Lollipop.
Now it only flashes red and blue led. No system and no recovery.
This is exactly what I did:
1. root
2. install TWRP 3.0.0.0
3. reboot to Recovery mode
4. completely format all partitions
5. upload CM13.zip and Gapps.zip
6. try to flash CM13
Here I got an error about the Baseband version and the flash did not started.
It was version 20B I guess.
7. Search Google about the error and found an update to version 30B
8. Download the firmware.zip and upload to phone
9. Flash firmware.zip
10. reboot
This is where I got stuck.
I thought it would boot to recovery again, but it is completely dead.
When I power the phone on, I can see the LG logo with this error at the top left:
ERROR : boot certification verify
[660] ------------------
[660] Secure booting Error!
[660] Cause : Boot certification verify
[660] -----------------
And then the screen turns off and the led flashes red and blue.
If I try to push Power and Volume Down, I got the same thing.
If I try to push Power and Volume Up, the screen turns off, but the led don't flash.
If I push only Volume Down the phone reboots to the LG logo.
LG Flash Tool does not detect the phone.
I've searched on Google, YouTube and here on XDA and did not found anything.
It was stupid to format all partitions, I know.
Is there a way to recover the phone or I should buy another one?
Thank you very much for the help.
Click to expand...
Click to collapse
http://forum.xda-developers.com/lg-g3/development/boot-verification-failed-secure-boot-t3337280

milance92 said:
http://forum.xda-developers.com/lg-g3/development/boot-verification-failed-secure-boot-t3337280
Click to expand...
Click to collapse
Thanks, man!
The flash of the KDZ file fixed this error, but it's always good to have this fix.
At this very moment I am ready to root my new Android 6.0 Stock

Accidentally formatted system partition. Now stuck at bootlogo

While trying to flash a ROM , I formatted the system partition through TWRP and accidentally rebooted the phone. I was running MIUI 7 in the phone previously. I have TWRP backup of system and boot but the phone is stuck at bootlogo and power button volume down combo fires factory mode. I guess I deleted both the recovery and the OS. Phone is getting charged , as the battery indicator is displayed when plugged. Is there anyway to recover my A1?
Sorry if the question is a repeat. Any help would be appreciated.

FridayEagle said:
While trying to flash a ROM , I formatted the system partition through TWRP and accidentally rebooted the phone. I was running MIUI 7 in the phone previously. I have TWRP backup of system and boot but the phone is stuck at bootlogo and power button volume down combo fires factory mode. I guess I deleted both the recovery and the OS. Phone is getting charged , as the battery indicator is displayed when plugged. Is there anyway to recover my A1?
Sorry if the question is a repeat. Any help would be appreciated.
Click to expand...
Click to collapse
yo man,
first of all for getting into recovery mode is ; power off your device > wait few seconds > then press power + volume up button, there you go.
then, if youve wiped your device's system partitions via twrp , nothin to worry, just download any rom, put it to your sd card, reboot recovery, wipe everything except sd card, choose downloaded zip to flash, swipe to confirm, once the flashing rom completes reboot your device. :good: