[Q] Update messed up G-Pad - G Pad 8.3 Q&A, Help & Troubleshooting

[Q] Update messed up G-Pad - G Pad 8.3 Q&A, Help & Troubleshooting

I had stock installed, rooted and twrp install, I downloaded the update and now it only boots into twrp. So i tried factory reset and restoring a backup I had, still nothing. Just now I pressed advanced wipe everything except SD Card, now I have no OS And no backup to restore.
For some reason twrp doesn't recognise any micro sd card I put in, says it cant mount them.
I can't get adb working whilst in recovery. I just want to go back to stock.
Also holding down vol down and up to get into download mode doesn't work.
Thanks for any advice.

Got it into download mode now somehow (rebooting from twrp instead of cold boot) and downloading the stock firmware from LG mobile support tool.

mike_1983 said:
Got it into download mode now somehow (rebooting from twrp instead of cold boot) and downloading the stock firmware from LG mobile support tool.
Click to expand...
Click to collapse
same problem here.. how did you get to download mode? cannot find a way..

Trunkam said:
same problem here.. how did you get to download mode? cannot find a way..
Click to expand...
Click to collapse
1. Turn off the tablet. (from twrp menu )
2. Push vol+ and vol- same time.
3. Insert usb cable.
4. Release both buttons. Now you should be in download mode.

hi mike_1983, but have you solved with this method?

Palux said:
hi mike_1983, but have you solved with this method?
Click to expand...
Click to collapse
I was in same situation. And i solved installing stock room with LG Mobile Launcher.
Go in download mode, and then follow this method: http://forum.xda-developers.com/showthread.php?t=2471370 is 100% working.

dont update the official rom if you re rooted or you have a custom recovery, they ll brick your tablet. If you have access to recovery you can install a custom rom and there is no need to go back to full stock (unless ofc you want to keep the stock rom in which case you need to flash it using the lg mobile support tool)

I think I did it by holding down vol up and vol down whilst in twrp, then pressing reboot, system (or perhaps pressing reboot system then holding them down). I'm not sure if the usb cable was plugged in or not. I tried holding down vol up and down from powered off, but it seemed to still always go into twrp.
Then you need B2CAppSetup.exe which is LGMobile Support Tool, you can then download the stock rom, it overwrites everything, like recovery and root.

Made the same mistake : said yes when the tablet proposed me to update. Booted in TWRP.
Tried to flash with support tool but it stops at 95% and tells me in german (!) to remove the battery and try again... I've tried many times (without removing the battery obviously), just the same.
And now I can't get out of the download mode. Everytime I plug the USB cable, it goes to download mode.
Any suggestion ?
EDIT :
I even tried this method : http://forum.xda-developers.com/showthread.php?t=2622777
and it stops giving me a decompression error...
Edit 2 : it finally uncomressed corectly but i'm still stucked at 95% when installing : WPARAM_UPGRADE_ERROR
EDIT 3 :
Using the method http://forum.xda-developers.com/showthread.php?t=2622777 and leaving default parameters : Korean language and country it finaly worked with the V50010A_00.kdz firmware.
My lg g pad is finally booting ! (the battery is totally drained)
Thanks to all !

Exoten said:
Made the same mistake : said yes when the tablet proposed me to update. Booted in TWRP.
Tried to flash with support tool but it stops at 95% and tells me in german (!) to remove the battery and try again... (..)
EDIT 3 :
Using the method http://forum.xda-developers.com/showthread.php?t=2622777 and leaving default parameters : Korean language and country it finaly worked with the V50010A_00.kdz firmware.
My lg g pad is finally booting ! (the battery is totally drained)
Thanks to all !
Click to expand...
Click to collapse
Many Tanks to Exoten (and others) :highfive:
Same mistake... Same errors (no standard flash / method available)... Try method from Edit 3 and ... My wife is happy again (this is her tablet)
++ No Wipe data necessary - All data (SD and internal were kept)
+ the OTA upgrade was applied, even if I selected A version of KDZ (and not B version)
- I lost the root
F'bien

Related

Secure Booting Error! Cause: boot certification verify

Hello all,
LG Optimus G Pro user here (LG-F240S). I recently rooted my phone, then used Gomdol's tool, which roots the phone and installs CWM recovery at the same time. I had initially thought that the application also unlocks the bootloader, but since then found out it doesn't.
Anyways, the first time rebooted into recovery, I flashed a ROM (specifically for F240S), which wasn't successful for some reason. Now, when I boot up the phone, it keeps saying "Secure Booting Error! Cause: boot certification verify"
I have tried everything, from the Volume down + Power + Home to erase everything and do the factory reset, but it doesn't work. I have also downloaded the stock firmware, and tried the KDZ_FW_UPD application to flash the stock firmware, which also did not work (Extract File Error). My last resort was using LGMobile Support Tool, but it keeps telling me to recharge my battery (my batter is currently recharged to 100%, and the USB is plugged in, so something is very wrong here).
I would really appreciate any help, It's been 3 days now without being able to use my phone and it sucks
Thanks!
J

Might wanna try this
ca12bon said:
Hello all,
LG Optimus G Pro user here (LG-F240S). I recently rooted my phone, then used Gomdol's tool, which roots the phone and installs CWM recovery at the same time. I had initially thought that the application also unlocks the bootloader, but since then found out it doesn't.
Anyways, the first time rebooted into recovery, I flashed a ROM (specifically for F240S), which wasn't successful for some reason. Now, when I boot up the phone, it keeps saying "Secure Booting Error! Cause: boot certification verify"
I have tried everything, from the Volume down + Power + Home to erase everything and do the factory reset, but it doesn't work. I have also downloaded the stock firmware, and tried the KDZ_FW_UPD application to flash the stock firmware, which also did not work (Extract File Error). My last resort was using LGMobile Support Tool, but it keeps telling me to recharge my battery (my batter is currently recharged to 100%, and the USB is plugged in, so something is very wrong here).
I would really appreciate any help, It's been 3 days now without being able to use my phone and it sucks
Thanks!
J
Click to expand...
Click to collapse
Hey mine did this i used the instruction in the thread below but i had the e980 so you might have to get your stock files but worth a try?
http://forum.xda-developers.com/showthread.php?t=2302660

Simply follow this method
http://forum.xda-developers.com/showthread.php?t=2396048

Hey man, I'm in the same boat, but I have the E988. What did you end up doing?

any idea?????
tase25 said:
Hey man, I'm in the same boat, but I have the E988. What did you end up doing?
Click to expand...
Click to collapse
i have the same problem here!! E975 when i dot the classic staff for custom rom i go to recovery i i see this in to my phone....boot certification verify
stock rom 4.4.2kk....what i mast do guys plz help

ca12bon said:
Hello all,
LG Optimus G Pro user here (LG-F240S). I recently rooted my phone, then used Gomdol's tool, which roots the phone and installs CWM recovery at the same time. I had initially thought that the application also unlocks the bootloader, but since then found out it doesn't.
Anyways, the first time rebooted into recovery, I flashed a ROM (specifically for F240S), which wasn't successful for some reason. Now, when I boot up the phone, it keeps saying "Secure Booting Error! Cause: boot certification verify"
I have tried everything, from the Volume down + Power + Home to erase everything and do the factory reset, but it doesn't work. I have also downloaded the stock firmware, and tried the KDZ_FW_UPD application to flash the stock firmware, which also did not work (Extract File Error). My last resort was using LGMobile Support Tool, but it keeps telling me to recharge my battery (my batter is currently recharged to 100%, and the USB is plugged in, so something is very wrong here).
F240S user here bro. I feel you
I would really appreciate any help, It's been 3 days now without being able to use my phone and it sucks
Thanks!
J
Click to expand...
Click to collapse
on your boot certification problem, I had that same problem before and made me panic for two days. I tried LG mobile support tool and worked for the first time. few weeks ago, I also encountered the same error on LG Mobile support tool (battery error,right?) I used I also used the KDZ_FW_UPD application and yes, extract error. but you know what the magical thing is? I found the G2 KDZ flasher from the G2 thread..
even if this was from G2 thread, it worked for my device.
here is the link and of course thanks to @hyelton for bringing this wonderful fix. now, I don't have to worry about bricking my phone again(except for hard bricking, of course).
http://forum.xda-developers.com/showthread.php?t=2432476
one more thing: make sure you download the KDZ. there is a thread here that links to that. but I think you have the right kdz now so just follow the steps. make sure you are in download mode press volume up and down (only the volume up and down. not the home or power) and then plug the cord.

guys, this happens when installing custom rom with lg stock rom in it and your device is not fully unlock. to lessen the hassle of worrying trying to reflash to the stock rom and downloading those huge files..just download any custom pure android rom , slimkat, cm11, etc then flash to your recovery..it would boot again without that error on boot certification. only that your on pure android rom but that's ok

nuvkyl20 said:
guys, this happens when installing custom rom with lg stock rom in it and your device is not fully unlock. to lessen the hassle of worrying trying to reflash to the stock rom and downloading those huge files..just download any custom pure android rom , slimkat, cm11, etc then flash to your recovery..it would boot again without that error on boot certification. only that your on pure android rom but that's ok
Click to expand...
Click to collapse
How do i flash the rom when i cant get into recovery? I have the same issue om my rooted g pad whit stockrom. I want to flash cyagenmod.

HELP PLEASE! My Lg G Pro e988 stays forever on this "Secure booting error! Cause: boot certification verify! Can't get in download mode. I have tryed all sort of combination keys but everytime this error pops up. My phone was on stock rom, then an official update started to download and ask me to reboot. After reboot this error!
HELP!

You should be able to get in download mode by following these steps. First take out the battery for atleast 5seconds, put it back in, then press and hold both vol + and vol - and within 2seconds plug in the usb cable, your computer should make the sound of a new device connected, when you hear that let go of the volume keys. The screen should say download mode now.
Sent from my LG-E980 using XDA Free mobile app

ivoh95 said:
You should be able to get in download mode by following these steps. First take out the battery for atleast 5seconds, put it back in, then press and hold both vol + and vol - and within 2seconds plug in the usb cable, your computer should make the sound of a new device connected, when you hear that let go of the volume keys. The screen should say download mode now.
Sent from my LG-E980 using XDA Free mobile app
Click to expand...
Click to collapse
It doesn't work! I did exactly what you say. No sound on pc, just that error on phone screen and no download mode
What should I do?
Thanks

Try booting into recovery, hold power and vol -. Or try power and vol +
Sent from my LG-E980 using XDA Free mobile app

ivoh95 said:
Try booting into recovery, hold power and vol -. Or try power and vol +
Sent from my LG-E980 using XDA Free mobile app
Click to expand...
Click to collapse
I have sent it to warranty and they told me that the phone was rooted, they sent me a picture with the back of the phone showing the imei and serial number and a front picture showing me that the phone has the app SuperSu.
They told me that the phone need a new motherboard that cost ~340 $.
Why do they need a new motherboard ? because the phone was not hard bricked.
I will get my device back.
Is possible to get it back with some modifications? I mean if they managed to boot it and see the SuperSu app.
I know to work with LG Flash Tool, so all I need is to put it to download mode.
All the above key combination didn't work. Power and vol- or power and vol+ ......
I will contact you again when i'll have my device.
Thanks!

yackmaan said:
I have sent it to warranty and they told me that the phone was rooted, they sent me a picture with the back of the phone showing the imei and serial number and a front picture showing me that the phone has the app SuperSu.
They told me that the phone need a new motherboard that cost ~340 $.
Why do they need a new motherboard ? because the phone was not hard bricked.
I will get my device back.
Is possible to get it back with some modifications? I mean if they managed to boot it and see the SuperSu app.
I know to work with LG Flash Tool, so all I need is to put it to download mode.
All the above key combination didn't work. Power and vol- or power and vol+ ......
I will contact you again when i'll have my device.
Thanks!
Click to expand...
Click to collapse
Any updates?

Long story with guys at warranty. I asked them to prove that the phone in those pictures is mine. From the picture showing my imei, yes is mine. But from the picture showing supersu app....they don't convince me. Every phone could have installed supersu app without being rooted. So i asked them to provide me another picture that will show the google account that was registered on phone and another with all my apps installed. They didn't send me such photos.
If they managed to revive my device and showing me there is a supersu app, that means they don't need to change the motherboard.
Am i right?
So i get my phone back working and they cut my warranty.
I tried vol+ and vol- and usb cable and download mode appeared.
Thankd!

yackmaan said:
Long story with guys at warranty. I asked them to prove that the phone in those pictures is mine. From the picture showing my imei, yes is mine. But from the picture showing supersu app....they don't convince me. Every phone could have installed supersu app without being rooted. So i asked them to provide me another picture that will show the google account that was registered on phone and another with all my apps installed. They didn't send me such photos.
If they managed to revive my device and showing me there is a supersu app, that means they don't need to change the motherboard.
Am i right?
So i get my phone back working and they cut my warranty.
I tried vol+ and vol- and usb cable and download mode appeared.
Thankd!
Click to expand...
Click to collapse
I smell something weird about LG. They probably put SuperSU on there or they got the wrong phone. Anyway i'm sure the community will help Don't lose faith/hope yet

About the warranty, its very complicated.
The store from which the phone was buyed, took it and send it to another warranty dealer authorized by LG, i guess, which was not named LG.
At last, I sold the phone, i own an lg g2 now and recently flash official lollipop.

Gladly and after some fails and always getting the secure boot certification error, i managed to access the download mode and with LG Flash Tool installed the stock .kdz on my LG L90 D405n.. thx for all the hints..

Before of this secure boot my e988 was working but no download mode. I've encountered this on a LG G2, so after some search i've found out that I must downgrade the bootloader. So, I rooted my device and installed autorec.apk from here http://forum.xda-developers.com/showthread.php?t=2715496 that fixes the " no download mode " .
I don't know how to skip the secure boot error. If someone managed please share with us!

Boot : Error Certification Verify
Hi. I am new to this thread although i had used this thread many times with issues i have had. There is this one issue im having that i can't seem to figure out which im usually good at doing by following forums or threads.
A couple weeks ago i had rooted my LG G Pad 7.0 V410 LTE tablet from AT&T. I had TWRP downloaded into it and i had flashed Candy5 it worked perfectly i just didn't like how it looked so i tryed to flash it back to original stock OS. But now when i boot my tablet up it goes to the LG screen and at the top left it says Boot : Error Certification Error. This has me dumbfounded on what i should do. when i connect the tablet to the computer nothing pops up no tablet connects to the computer. I tryed downloading the drivers and everything but nothing seemed to work. I need help with this issue please!!
I didn't know where else to post this issue due to being new!!!

[Guide]Restore to Stock "Bricked" "Unlocked" LG Optimus G f180,E97x

[Guide]Restore to Stock "Bricked" "Unlocked" LG Optimus G f180,E97x
The problem starts when you unlock F180 Bootloader with "freegee":
Unlock the bootloader:
There are 2 ways:
Method 1: Unlock the bootloader
http://www.mediafire.com/download/kzbp2gicuj22cv5/Tool_Root_Unlock_BL_4.1.2_edited.zip
Advantages:
- enough fastboot functions: Start, Power Off, Recovery mod, Restart Bootloader
- Easy on the function keys
-Cons:
- To Relock, just you have to flash KDZ
Method 2: Unlock by app
https://play.google.com/store/apps/details?id=edu.shell.freegee_free&hl=en
Advantages:
- Add.
- Can be easily Relock by app.
Cons:
- Right to Recovery through app (on Stock Rom & 975).
- Loss of function fastboot that this very important function.
- When crashes, not able to Recovery by pressing hard.
It is recommended to use the first way. :angel:
on E975, E970, E97.x unlock, select KT or SKT. Because E975 and the S / K has Same bootloader unlock.
i have already faced this situation to unlock bootloader with freegee and stuck with google logo and fastboot mode :crying:
not even KDZ flash working, always result in fastboot or KDZ tool stop working. also tried different KDZ and flashing Tools
Tried "TeenyBin" ,not success :crying: but get twrp working, then flash CM10 as suggested but got this
Subsystem Crash!
------------------------------------------------------------
DemiGod Crash Handler : Subsystem Crash! : External_modem (Undefined error)
Press key to choose Dload Mode/Reboot/Fastboot.
1) Volume Up : Dload Mode.
2) Volume Down : Reboot.
3) Power : Fastboot.
------------------------------------------------------------
to solve this have to remove sim card and change baseband in TWRP using ADB
then perform a hardreset.
now the device comes in life again
but you find the device is not properly working may be sim or gprs or wifi or something else.
now have to unlock bootloader again by adb with this method
Method 1: Unlock the bootloader
http://www.mediafire.com/download/kzbp2gicuj22cv5/Tool_Root_Unlock_BL_4.1.2_edited.zip
Advantages:
- fastboot functions: Start, Power Off, Recovery mod, Restart Bootloader
- Easy on the function
-Cons:
- To Relock, you have to flashed KDZ
Click to expand...
Click to collapse
after that will able to flash the stock KDZ without any problem
put device in D/W mode and flash it with appropriate official KDZ
Guide to flash KDZ
http://forum.xda-developers.com/showthread.php?t=2388440
:good:
have to follow the procedure because adb in recovery not able to replace the bootloader files
KDZ flash After mako bootloader unlock
step 1:
use TeenyBin http://forum.xda-developers.com/showthread.php?t=2249500
get twrp working, then flash CM10 for you device.
you will got this
Subsystem Crash!
------------------------------------------------------------
DemiGod Crash Handler : Subsystem Crash! : External_modem (Undefined error)
Press key to choose Dload Mode/Reboot/Fastboot.
1) Volume Up : Dload Mode.
2) Volume Down : Reboot.
3) Power : Fastboot.
------------------------------------------------------------
step 2:
to solve this have to remove sim card and change baseband in TWRP using ADB
then perform a hardreset.
to reflash the bootloader files you have to enter in CM10 or some ROM with SU or busybox;
now the device comes in life in CM10
now the device comes in life again
but you find the device is not properly working may be sim or gprs or wifi or something else.
now have to unlock bootloader again by adb with this method
Quote:
Method 1: Unlock the bootloader
http://www.mediafire.com/download/kz...1.2_edited.zip
Advantages:
- fastboot functions: Start, Power Off, Recovery mod, Restart Bootloader
- Easy on the function
-Cons:
- To Relock, you have to flashed KDZ
after that will able to flash the stock KDZ without any problem
put device in D/W mode and flash it with appropriate official KDZ
Guide to flash KDZ
http://forum.xda-developers.com/show....php?t=2388440
have to follow the procedure because adb in recovery not able to replace the bootloader files
Click to expand...
Click to collapse
UNLOCk steps:
enable USB debugging
connect as MTP
follow the steps in script

umar_fiaz said:
The problem starts when you unlock F180 Bootloader with "freegee":
Unlock the bootloader:
There are 2 ways:
Method 1: Unlock the bootloader
http://www.mediafire.com/download/kzbp2gicuj22cv5/Tool_Root_Unlock_BL_4.1.2_edited.zip
Advantages:
- enough fastboot functions: Start, Power Off, Recovery mod, Restart Bootloader
- Easy on the function keys
-Cons:
- To Relock, just you have to flash KDZ
Method 2: Unlock by app
https://play.google.com/store/apps/details?id=edu.shell.freegee_free&hl=en
Advantages:
- Add.
- Can be easily Relock by app.
Cons:
- Right to Recovery through app (on Stock Rom & 975).
- Loss of function fastboot that this very important function.
- When crashes, not able to Recovery by pressing hard.
It is recommended to use the first way. :angel:
on E975, E970, E97.x unlock, select KT or SKT. Because E975 and the S / K has Same bootloader unlock.
i have already faced this situation to unlock bootloader with freegee and stuck with google logo and fastboot mode :crying:
not even KDZ flash working, always result in fastboot or KDZ tool stop working. also tried different KDZ and flashing Tools
Tried "TeenyBin" ,not success :crying: but get twrp working, then flash CM10 as suggested but got this
Subsystem Crash!
------------------------------------------------------------
DemiGod Crash Handler : Subsystem Crash! : External_modem (Undefined error)
Press key to choose Dload Mode/Reboot/Fastboot.
1) Volume Up : Dload Mode.
2) Volume Down : Reboot.
3) Power : Fastboot.
------------------------------------------------------------
to solve this have to remove sim card and change baseband in TWRP using ADB
then perform a hardreset.
now the device comes in life again
but you find the device is not properly working may be sim or gprs or wifi or something else.
now have to unlock bootloader again by adb with this method
after that will able to flash the stock KDZ without any problem
put device in D/W mode and flash it with appropriate official KDZ
Guide to flash KDZ
http://forum.xda-developers.com/showthread.php?t=2388440
:good:
have to follow the procedure because adb in recovery not able to replace the bootloader files
Click to expand...
Click to collapse
thx for post my friend i have e975 i use freege and mako unlock .I used the first two months trouble-ROM but i have Subsystem crash error.... (external modem ) and i back to stock kdz but no root +bootloader unlocked i use my rom but I found something new
----------------------------------------------------
This problem can easily be solved, I spent 20+ hours on researching this, it's not an operator problem, but a common problem with both the Optimus G and the Nexus 4.
What causes it? Extreme low power states of the processor, some modems are too sensitive for this kind of deeeeeeep sleep (depending on production batch). These states are called C0 (WiFi) until C3 (complete power collapse).
Disable C2 and C3 and enable C0 and C1 and voila, it will never happen again
How? Buy and install Fauxclock, I don't know how to do it manually nor I couldn't find any other app.
You can thank me, but you should also thank Faust because he brought me this solution. Joying all the custom roms for months without problems
---------------------------------------------
Quote:
Originally Posted by metrixx02 View Post
my friend thx for post but ... i have one question what is this c0,c1,c2,c3c ????? CORES ?
x_justin :
No some power state of the processor, linux terms. Nothing to do with core numbers. As far as I know the only app that can change this is FauxClock from the play store, but it's worth the money. Just disable C2 and C3, it's still good for the battery. Stock roms from LG also have this disabled.
C0 Operational state. CPU fully turned on.
C1 First idle state. Stops CPU main internal clocks via software. Bus interface unit and APIC are kept running at full speed.
C2 Stops CPU main internal clocks via hardware. State where the processor maintains all software-visible states, but may take longer to wake up through interrupts.
C3 Stops all CPU internal clocks. The processor does not need to keep its cache coherent, but maintains other states. Some processors have variations of the C3 state that differ in how long it takes to wake the processor through interrupts.
http://doc.opensuse.org/products/draft/SLES/SLES-tuning_sd_draft/cha.tuning.power.html
PLS ONE USER TEST İT
NOT TESTED BY ME
THX x_justin

alimzia said:
Hey thanks a ton bro! I just had a few questions before using the first method to unlock my phones bootloader.
Is this method safe? Has it been tested enough yet? I dont want to use FreeGee again (soft bricked my phone the first time around using it).
If yes, can you please tell the steps to unlock using the 1st method?
Thnks again!
Click to expand...
Click to collapse
you say that u had used freegee??then did u also get ur bootloader of mako?
how did u switch back to stock rom??help me plz...
i need a kdz link for e975 too

I've tested the first method one time without any problem. I highly recommend to use this method rather in play store

yogivin said:
you say that u had used freegee??then did u also get ur bootloader of mako?
how did u switch back to stock rom??help me plz...
i need a kdz link for e975 too
Click to expand...
Click to collapse
Sorry I forgot to mention that was with the at&t version (had that earlier). After it got softbricked by using FreeGee I used teenybin to revive it. Wasn't able to get back into the official rom though. Instead used teenybin to flash recovery (teenybin also unlocks the bootloader in the process) and from there I used a zip file of the official Rom.
I don't know this, Im not entirely sure, but maybe if you can get a zip file (as you do for roms) you can then flash it via recovery. It wont lock back the bootloader ofcourse. Again, I m not sure about it and you best ask a senior member. It did work for me though, on At&t version.
---------- Post added at 07:52 PM ---------- Previous post was at 07:04 PM ----------
yawako said:
I've tested the first method one time without any problem. I highly recommend to use this method rather in play store
Click to expand...
Click to collapse
Can you please lay down the step by step how to unlock bootloader via this method? I do have some idea but don't want to do something stupid and make matters even worse.
Also, I had already tried using FreeGee before i stumbles upon your post. It did nothing, instead during the unlocking process FreeGee force closed. So does that change anything anyhow? I havent even rebooted my phone since then in fear of a possible hard brick
Highly appreciate your replies people!

yogivin said:
BROTHER..i have a LG E975..i unlocked bootloader and now have a mako bootloader installed..its model version is e960 i.e nexus 4..installed kitkat..now i want 2 get back to stock rom..but my model number is changed from e975 to e960..f i try to restock it with lg flash tool it say check phone model..can u plz help me brother ..would be vry thankful to u
Click to expand...
Click to collapse
Edited: to show flash step by step

umar_fiaz said:
Edited: to show flash step by step
Click to expand...
Click to collapse
Can you also add the step by step procedure to unlock bootloader using the first method? As in wether your phone should be in download mode, charge only mode etc etc.

alimzia said:
Can you also add the step by step procedure to unlock bootloader using the first method? As in wether your phone should be in download mode, charge only mode etc etc.
Click to expand...
Click to collapse
enable usb debugging
connect as MTP
follow the script

Hey
Yesterday I flash CM11 over stock 4.1.2 on my Optimus G (E975) and later decided to go back to stock again.
Everything was done witouht problems using nand back up with CWM
But later I realiced that M5 was out and, once again tried to install it but I couldnt
Dont know what happen but now while device is turning on, or trying to go into recovery or dowload mode screen is BLACk.
Device is working properly, I mean I turn it off/on and no problem. Just cant enter fastboot, recovery or download mode.
I tried a couple method to go back to stock using KDZ but proceess stop and nothing, just keep pressing power buttom and phone reboot (just black screen during the process)
Please, any ideas/suggestions
O no please.
I follow method one, I get succes message and now my wifi refuses to turn on. WTF
Update 2:
Now Im screwed. I tried to install another recover with Rom Manager and now phone refuses to turn on.
Something is detected in the pc while conecting it but I have only a black screen
Please what can I do??

ErnestoD said:
Hey
Yesterday I flash CM11 over stock 4.1.2 on my Optimus G (E975) and later decided to go back to stock again.
Everything was done witouht problems using nand back up with CWM
But later I realiced that M5 was out and, once again tried to install it but I couldnt
Dont know what happen but now while device is turning on, or trying to go into recovery or dowload mode screen is BLACk.
Device is working properly, I mean I turn it off/on and no problem. Just cant enter fastboot, recovery or download mode.
I tried a couple method to go back to stock using KDZ but proceess stop and nothing, just keep pressing power buttom and phone reboot (just black screen during the process)
Please, any ideas/suggestions
O no please.
I follow method one, I get succes message and now my wifi refuses to turn on. WTF
Update 2:
Now Im screwed. I tried to install another recover with Rom Manager and now phone refuses to turn on.
Something is detected in the pc while conecting it but I have only a black screen
Please what can I do??
Click to expand...
Click to collapse
have you tried TeenyBin http://forum.xda-developers.com/showthread.php?t=2249500

Yes but I could solve that problem now.
One thing I learned: I will never install a custom rom on my OG. I had several devices before this one and always with custom roms. But with LG there are so many risks and problems to perform needed actions
Thanks
umar_fiaz said:
have you tried TeenyBin http://forum.xda-developers.com/showthread.php?t=2249500
Click to expand...
Click to collapse

ErnestoD said:
Yes but I could solve that problem now.
One thing I learned: I will never install a custom rom on my OG. I had several devices before this one and always with custom roms. But with LG there are so many risks and problems to perform needed actions
Thanks
Click to expand...
Click to collapse
very true. iv learned the lesson too..it was risky to install stock back
its not a cheap phone after all..moreover stock roms are the best ones. u wont get those features n qlides etc in custom

It appears to be that certain functions are sensitive to low power states.
Without downloading the fauxclock app, I took out the SIM from the phone. This allows the phone to work well enough without crashing due to the modem being initialized in a low power state.
Got into performance and set the minimum clock at 1000MHz (for now).
Phone works again.

Recovery mode only
Hello,
I have F180L, I upgraded it to 4.4.2 kitkat then rooted it with freegee and installed cwm via freegee. then booted into recovery and installed Sling 2.2 kitkat. every thing was working great until I factory reset the phone. Now, the phone is stuck in cwm. It starts and boots into cwm . even if I turn off the phone and plug in the power, the phone boots in cwm. it is not even charging because of the led light which is always on in cwm. I have tried everything but nothing is happening ....
someone plz help me and suggest me something to charge and unbrick my phone

Recovery mode only
w8ing for reply...
someone help me please

solution
farhan.ahmed said:
w8ing for reply...
someone help me please
Click to expand...
Click to collapse
1st try to get in download mode..hope u know how to get into download mode.
there is some key combination
vol up+insert cable

yogivin said:
1st try to get in download mode..hope u know how to get into download mode.
there is some key combination
vol up+insert cable
Click to expand...
Click to collapse
I have installed teenybins now I have fastboot and twrp recovery but when i use install zip from sd card, it gives me error E: Can`t mount /sdcard. when i try adb sideload, it show an error can`t read xxx.zip
I need tot and dll files for F180L to try LGNPST
please help me

farhan.ahmed said:
I have installed teenybins now I have fastboot and twrp recovery but when i use install zip from sd card, it gives me error E: Can`t mount /sdcard. when i try adb sideload, it show an error can`t read xxx.zip
I need tot and dll files for F180L to try LGNPST
please help me
Click to expand...
Click to collapse
i dont think there is any need for teenybins n etc
jus try to get into download mode and thn try this link
http://forum.xda-developers.com/showthread.php?p=53659718#post53659718

Bootloop - No Custom OS - No USB Debugging

Hello All,
I am using Samsung Note 3 Neo, unfortunately I have struck up with bootloop. I have read around and tried all the bootloop fixes but they all require the phone to have USB Debugging enabled prior for the fixes to work. Sadly for me, I didn't have the prior knowledge that that was available so I am stuck with a soft bricked phone with no work around.
Any help on issue is greatly appreciated.
Thanks in Advance

You can still access download mode (volume down+home+lock), right? Try flashing TWRP using odin ( i don't think you need to have usb debugging enabled) and then wipe everything and flash stock rom. Or if instaling TWRP does not work, flash directly stock rom using Odin. Hope that helps

aalkino said:
You can still access download mode (volume down+home+lock), right? Try flashing TWRP using odin ( i don't think you need to have usb debugging enabled) and then wipe everything and flash stock rom. Or if instaling TWRP does not work, flash directly stock rom using Odin. Hope that helps
Click to expand...
Click to collapse
Thanks for Reply
I am not able to access download mode, I tried using volume down+home+lock button, Its not getting into Custom OS mode. Just black screen blinks and same samsung logo will come for thrice it will blink and then goes into bootloop

Hmm.. Can you access your stock recovery (home+lock+vol. up)? If you can, try doing factory reset and reboot. Not being able to enter download mode is really rare

aalkino said:
Hmm.. Can you access your stock recovery (home+lock+vol. up)? If you can, try doing factory reset and reboot. Not being able to enter download mode is really rare
Click to expand...
Click to collapse
Yes, I tried factory reset, It didn't worked out.

Thanks for your support buddy!!!
Problem got resolved, went to service center and asked to put the mobile into download mode. and Install custom OS

halp. hi I'm from Canada and tried to root my note 3 for the first time sadly I soft bricked the phone and don't know what to do, ive looked up tutorials to no avail please I need help

DraculaAdil said:
halp. hi I'm from Canada and tried to root my note 3 for the first time sadly I soft bricked the phone and don't know what to do, ive looked up tutorials to no avail please I need help
Click to expand...
Click to collapse
Is your phone a Note 3 or a Note 3 Neo? These phones are two different variants.
Can you access download mode? (Phone off, press volume minus + home key + power at the same time until you see the phone starting to ask you if you want to procceed to access to download mode)
If yes, your model number is written at the top, download the latest firmware available for your phone model on samfirmware and flash it using odin, follow a tutorial if you are unsure cause you don't wana mess your phone up more that it already is.
If it cannot access download mode, this is gonna be a bit more complicated :/

Secure booting error after Hidden menu test

Hello,
i dropped my phone last night and at first boot phone clock changed and i could not connect wifi. i tried to connect wifi today but it did not worked. Thats why i opened hidden menu by using *#546368#*855# test my phone if there is a hardware problem or not. i clicked first option then second option my phone got reset but i got Secure booting error after that and it stuck. Then i opened twrp by using factory data reset option. i got backup of my data from twrp menu.
What should i do now?
Notes:
- i use twrp + android 6.0 rooted firmware
- i dont know if can can install apk since i cant open android system
- i dont want to install stock rom by a pc because i think i will lose all info on phone and ont be able to get them back without twrp.

juba08 said:
Hello,
i dropped my phone last night and at first boot phone clock changed and i could not connect wifi. i tried to connect wifi today but it did not worked. Thats why i opened hidden menu by using *#546368#*855# test my phone if there is a hardware problem or not. i clicked first option then second option my phone got reset but i got Secure booting error after that and it stuck. Then i opened twrp by using factory data reset option. i got backup of my data from twrp menu.
What should i do now?
Notes:
- i use twrp + android 6.0 rooted firmware
- i dont know if can can install apk since i cant open android system
- i dont want to install stock rom by a pc because i think i will lose all info on phone and ont be able to get them back without twrp.
Click to expand...
Click to collapse
Hello,
You need to install Mr.Bump (click on it to download it) and move it to your Phone (Go to TWRP,connect your phone with your PC,move the file to your phone)Then click install and select "Mr.Bump.zip" file.
Greetings.

thanks you but i bricked my phone last night now it does not even open or charge. Thats i have done so far:
i used auto rec on my lg g3 d855 phone. https://forum.xda-developers.com/lg-g3/development/stock-d855-30b-images-kdz-flashables-t3282012 i had stock lg 6.0 30b firmware provided in this topic. it said succsfull and after the reset phone did not open and it does not respod to any button also dont get charge there is just black screen. is there there any way yo fix this?
do you think something like this topic help this issue?
https://forum.xda-developers.com/verizon-lg-g3/general/how-to-hardbrick-guide-using-test-t3276928

juba08 said:
thanks you but i bricked my phone last night now it does not even open or charge. Thats i have done so far:
i used auto rec on my lg g3 d855 phone. https://forum.xda-developers.com/lg-g3/development/stock-d855-30b-images-kdz-flashables-t3282012 i had stock lg 6.0 30b firmware provided in this topic. it said succsfull and after the reset phone did not open and it does not respod to any button also dont get charge there is just black screen. is there there any way yo fix this?
do you think something like this topic help this issue?
https://forum.xda-developers.com/verizon-lg-g3/general/how-to-hardbrick-guide-using-test-t3276928
Click to expand...
Click to collapse
It would be better not to flash those kdz files.
You could have asked here before proceeding,but it doesn't matter now.
For the topic that you sent,I'm not sure that it will work.
So,can enter in Download mode (Click on it to see how to enter)
If you can,please reply.

Sotiris02 said:
It would be better not to flash those kdz files.
You could have asked here before proceeding,but it doesn't matter now.
For the topic that you sent,I'm not sure that it will work.
So,can enter in Download mode (Click on it to see how to enter)
If you can,please reply.
Click to expand...
Click to collapse
i have done everything on that topic i went ok until last steps but at last i still got black screen and cant enter download mode or boot. but pc recognizes the phone as lge androidnet usb now in device manager. it was Qualcomm 9008 at start.

juba08 said:
i have done everything on that topic i went ok until last steps but at last i still got black screen and cant enter download mode or boot. but pc recognizes the phone as lge androidnet usb now in device manager. it was Qualcomm 9008 at start.
Click to expand...
Click to collapse
Hmm Try this guide Unbrick guide (it's officially for D855)

thanks it worked in second time now i can enter download mode i am flashing with lg flash tool. the problem is i could not install twrp before. i tried 5 roms + autorec, twrp manager and twrp offical app. and all resulted failing to open clock work mode. now i will try with D85530B_00_1217_32G.kdz
i have twrp backup in my sd card that why i am trying to boot into twrp for more than 24 hours. i hope i can do this. i winn never use eutorec i will use offical twrp app next time.
i can open android but i cant open twrp i got error boot vefication failed. i can use phone like that but i want to get my backup. if i cant i will have to install apps one by one and i will also lose some files, contacts, data etc.

[Q] Bricked Gpad 8.3 - stock rom via LG Flash Tool not working

So. Recently, I got CyanogenMod 13 on my Gpad. Everything was just fine. Then I installed the Magisk Manager, which, for some reason, disabled the root access on the device. When I uninstalled it, my recovery (TWRP) asked me, if I want to install SuperSU. I selected yes. And that's the moment when everything fcked up. After SuperSU installation, my tablet went into bootloop, and I wasnt't even able to enter recovery via button combination. I tried to flash the stock rom via LG Flash Tool, but failed miserably. I tried multiple stock roms, but the result is till the same: I can't access the Factory Reset via buttons, the system keeps rebooting, and even if it boots for few seconds, the touchscreen isn't responding. I even tried connecting mouse via USB otg, but no success. Is my tablet dead? Is there any chance of repairing it?
Thank you for your help.
EDIT: It's v500 European version.

Czechball said:
So. Recently, I got CyanogenMod 13 on my Gpad. Everything was just fine. Then I installed the Magisk Manager, which, for some reason, disabled the root access on the device. When I uninstalled it, my recovery (TWRP) asked me, if I want to install SuperSU. I selected yes. And that's the moment when everything fcked up. After SuperSU installation, my tablet went into bootloop, and I wasnt't even able to enter recovery via button combination. I tried to flash the stock rom via LG Flash Tool, but failed miserably. I tried multiple stock roms, but the result is till the same: I can't access the Factory Reset via buttons, the system keeps rebooting, and even if it boots for few seconds, the touchscreen isn't responding. I even tried connecting mouse via USB otg, but no success. Is my tablet dead? Is there any chance of repairing it?
Thank you for your help.
EDIT: It's v500 European version.
Click to expand...
Click to collapse
nope, it's not death (yet)... The buttoncombo to enter might be a problem, but keep trying. If really nothing goes, try connecting to your PC and open a commandline. Type : adb reboot recovery (preferably from a linuxbox). However, make sure you got a ROM, GApps and SU system 2.78 or 2.79 ready on the SD. Personally I recommend @adrianom AOSP 7.1.1, OpenGApps micro and SU 2.79 SR2'systemmode.
Cheers

dirlan2001 said:
nope, it's not death (yet)... The buttoncombo to enter might be a problem, but keep trying. If really nothing goes, try connecting to your PC and open a commandline. Type : adb reboot recovery (preferably from a linuxbox). However, make sure you got a ROM, GApps and SU system 2.78 or 2.79 ready on the SD. Personally I recommend @adrianom AOSP 7.1.1, OpenGApps micro and SU 2.79 SR2'systemmode.
Cheers
Click to expand...
Click to collapse
Thank you for your reply.
However:
I am not able to stay in the system.
I am not able to enter the recovery. (because of the brick)
I am not able to enter ADB, because there's just no way how. I have USB debugging disabled by default (because I tried to reset the system using LG Flash Tool) and I can't use ADB in the download mode.
Actually, download mode is the only thing that hasn't broke yet. I still hope that someone that has experienced similar problems help me.
But again, thanks for your (and the only) reply.

Czechball said:
Thank you for your reply.
However:
I am not able to stay in the system.
I am not able to enter the recovery. (because of the brick)
I am not able to enter ADB, because there's just no way how. I have USB debugging disabled by default (because I tried to reset the system using LG Flash Tool) and I can't use ADB in the download mode.
Actually, download mode is the only thing that hasn't broke yet. I still hope that someone that has experienced similar problems help me.
But again, thanks for your (and the only) reply.
Click to expand...
Click to collapse
If you can get into download, you could connect to a PC and start the LG-tools.Use that to restore to the original ROM and start allover again with latedt software (TWRP, ROM, SU)
Cheers

Develop Bugs

welcome