yashsingh1/xdaforums huggingface dataset:
[LG Optimus L9 P760, P765, P768, P769] honzicek22:
Oh my phone god, please help.

Hello. I may have very stupid questions, however I have to ask. How the hell am I supposed to "power off" the phone, when it doesn't have battery plugged in? Second one: I do everything as there was written, still, when I unplug the USB, 2 mins later phone turns on, I plug it to PC and.. nothing happened. Come on now. And last, but not least: Shouldn't I have some files somewhere? (I mean other than omap4boot in my C: directory, for example some p*.bin file? )

Ok, that's it. I am sorry for my ignorance, nevertheless I want to learn and fix the bootloop. Thanks :)

/Please, talk to me like to an idiot. I am new here, in the world of mobile phones. Thank you
[LG Optimus L9 P760, P765, P768, P769] lecorbusier:
I was never using omap4boot for unbricking or other. It's several year okd stuff, right? And i could always unbrick the prescribed way, with current LG usb drivers, and a battery with enough juice left.
[LG Optimus L9 P760, P765, P768, P769] cyadron:
Hi,

I have the same problem with a LG P760.

The phone is bricked (nothing at all shown on screen, does not enter SW Upgrade mode).

When I connect the phone without battery to the PC using a 910k ohm cable I see the OMAP4430 device and keeps connecting and disconnecting. I can get the phone in LGE Mobile USB mode using L9 Fastboot tool and I can start writing the firmware but the phone gets disconnected by itself after 3 minutes and the process does not finish.

Did anyone manage to solve this issue. Also, how can I determine now if the bootloader was locked?

Thanks.
[LG Optimus L9 P760, P765, P768, P769] lecorbusier:
Without battery, nithing except the initial handshaking procedure should work , where the pc powers the usb device with a 100mA current, to retrieve basic Information about the device.

Bootloader, dunno. The bootloader status is in the baseband rom and can be retrieved with an USSD code(system menu). Via the dialer app and probably ADB, too. If the latter somehow still works ...

It's several months back since i had to unbrick several times. As I remember, S/W mode is the stock rom's recovery. What always worked, is Download mode, which should produce a screen saying D/L mode. But i may be wrong.
[LG Optimus L9 P760, P765, P768, P769] cgigate:
When you see omap4430 , you can get into fastboot mode to flash a and b boot then you should be able to get into download mode ....
[LG Optimus L9 P760, P765, P768, P769] lecorbusier:
A Win 7 or XP system provided. With Win 8 or 10 Fastboot don't work for many or all. But this seems L9(or TI OMAP) -exclusive, other devices still can employ Fastboot.
[LG Optimus L9 P760, P765, P768, P769] yurais:
Am reciving:

FAILED (remote: : partition doesn't exist)

finished. total time: 0.010s

When I try to write anything. x-boot u-boot, recovery, whatever.

How to fix this?

MS769: Failed flashing using Octopus Box Tool
[LG Optimus L9 P760, P765, P768, P769] CMEX62:
Hi All, How to resolve^ erasing 'u-boot'...

FAILED (remote: : partition doesn't exist)

finished. total time: 0.003s
[LG Optimus L9 P760, P765, P768, P769] sguerrini97:
Thank you this can be usefull to do a full dump in one step, however we can't restore the system or data partition with fastboot cause they are too big.

For rooted phones, is also possible to make a script that restore the dumps.

I restored a system dump with dd and the phone get blocked, after removing the battery the changes took effect so it works.
[LG Optimus L9 P760, P765, P768, P769] Jrkoffjonson:
So a restore you did took into effect even though the phone says it blocked it?
[LG Optimus L9 P760, P765, P768, P769] sguerrini97:
During the system partition restore the phone didn't respond, but the adb terminal was still working and at the end I rebooted the phone by pulling out the battery and put it back in. The partition was restored.
[LG Optimus L9 P760, P765, P768, P769] cgigate:
Great work
[LG Optimus L9 P760, P765, P768, P769] Tablechair:
Can a P769 user give me their u-boot.img and x-loader.img please? Would be greatly appreciated.
[LG Optimus L9 P760, P765, P768, P769] cgigate:
you can get from your phone .. or download from rom session, the u and x boot are exactly same as p765.
[LG Optimus L9 P760, P765, P768, P769] ytapjani:
Bricked after pressing "Y"

Help me please,

I am following your tutorial and accidentally i pressed "Y" on writing u-boot.

Anyone can help how to recover my bricked L9 ? Desperately need your help.

i am using windows 7 32bit enterprise edition, with LG L9 P765

thank you so much
[LG Optimus L9 P760, P765, P768, P769] Lelus:
Which Android version is your phone running?.
[LG Optimus L9 P760, P765, P768, P769] ytapjani:
I am using the V20b Hongkong..

kindly please advise..

thank you
[LG Optimus L9 P760, P765, P768, P769] Lelus:
You need to ask someone with same phone(rooted) model as yours ,running v20 to dump their uboot:

adb shell su -c busybox dd if=/dev/block/mmcblk0p2 of=/sdcard/external_sd/p2.bin

and you can restore it by :

fastboot flash u-boot p2.bin
[LG Optimus L9 P760, P765, P768, P769] ytapjani:
Dear Sir Lelus,

Thank you very much for your enlightnment, i will see someone with the same conditon to dump their uboot.

and will let you know if that is working.

have a good day sir
[LG Optimus L9 P760, P765, P768, P769] cgigate:
actually, any L9's uboots are same, as long you load the correct x and u boot , you will be able to get the upgrade mode back to do kdz flash to restore your phone
[LG Optimus L9 P760, P765, P768, P769] donk165:
Hi there,

I've made a bit of a mess of my phone. I have a P768 on v10E Taiwan. I unlocked the bootloader by flashing a P760 v20c Rom then flashed back to v10e. I was trying to add CWM but for some reason fastboot wasn't working. So I followed this guide, and fastboot still isn't working. I noticed this program flashes files to the phone. Is there a way I can reverse what the program did? In SD maid, the phone is listed as a 'u2' device. And when I connect to the pc, it's a P760. But when I use the LG flash tool and in system setting on the phone, it says it's a p768. What would you recommend to put the phone back to stock, so I can start fresh.

Sorry for the long post, I wanted to be clear
[LG Optimus L9 P760, P765, P768, P769] cgigate:
simple reload x and u boot to your phone, you will be able to get in the upgrade mode, using the kdz flash to revive the phone
[LG Optimus L9 P760, P765, P768, P769] donk165:
Im guessing I need fastboot to reload the x and u boot. I dont have access to fastboot, or atleast I dont think i do. Ive tried 'adb reboot oem-unlock' and 'adb reboot bootloader' and the phone only normally reboots. How do I access fastboot?
[LG Optimus L9 P760, P765, P768, P769] cgigate:
read the first post to learn how to fastboot
[LG Optimus L9 P760, P765, P768, P769] donk165:
Okay, I read it, But I dont really understand how? (I shouldn't have blindly followed this tutorial!). To be clear, My phone isn't bricked. Its working fine, apart from when I try to put CWM onto it. Both methods dont work. I'm guessing these u and x boots being replaced is the issue.

Im a bit lost as to what I've actually done here. So by following this guide, I have the x and u boot of a different phone? Sorry, I am a noob to this. I really shouldn't have used this program.

Does KDZ flashing replace the x and u boots?
[LG Optimus L9 P760, P765, P768, P769] cgigate:
you need read how to put the CWM, it has nothing to the u/x boot.
[LG Optimus L9 P760, P765, P768, P769] donk165:
I know how to put CWM on the phone. What I'm trying to say is, when I use adb and type 'adb reboot bootloader', the phone does not reboot into the bootloader/fastboot. It reboots normally and goes back into the OS. By following this tutorial (possibly incorrectly), I have changed something on my phone. If its not the x/u boots that have been changed, what does this omap4boot program change when you select option 3? Because my phone now being identified as DEVICE - u2, PRODUCT - u2_tcl_mx
[LG Optimus L9 P760, P765, P768, P769] cheong12001:
I think i have same issue with u, i cant unlock the bootload as it reboot as normal without entering fastboot after typing the unlock command. I have flashed 20b eu version still cant finish the job
[LG Optimus L9 P760, P765, P768, P769] thomasoeli:
For me the same problem. I cant open fastboot, too. I am back to V10B rooted, but the bootloader is locked.

When I use adb and type 'adb reboot bootloader', the phone does not reboot into the bootloader/fastboot. It reboots normally and goes back into the OS. I wait more then 50minutes to reboot to the fastboot.

I think, the bootloader is locked forever? I dont have any idea to unlock the bootloader. I try it with V20B JB, but i have no luck.

How is it possible to unlock the bootloader now on ICS?

I try to find out the bootloader status with dial "3845#*768#", but the "Bootloader Unlock check" is missing? How can i check my bootloader status?
[LG Optimus L9 P760, P765, P768, P769] donk165:
Have you done this tutorial in this thread for omap4boot? I think the script handles differently for us on P768, i think it automatically replaces some files on your phone with the ones from the LG Prada, and I think this is why we cannot unlock our bootloaders. If we had backups of the x/u boot images or which ever images the fastboot program replaces, we could flash the originals back on and hopefully then be able to unlock the bootloader.
[LG Optimus L9 P760, P765, P768, P769] Lelus:
the script doesn't replace anything automatically , telcel jb rom doesn't allow bootloader unlocking and most likely when you flash 760 v20 kdz it doesn't update x-loader and/or u-boot on p768 and that's why you are not able to unlock bootloader
[LG Optimus L9 P760, P765, P768, P769] donk165:
Okay, well maybe I did accidentally click [Y] on flashing, and didnt realise.
[LG Optimus L9 P760, P765, P768, P769] thomasoeli:
Hello,

the problem is, a cannot install the "omap4boot" drivers, because i hear the sound from windows for connect and next second for disconnect. 1 second later hear the sound for connect and then disconnect.

And then i can find no entry for "omap4".

I use Windows 8 x64 with all LG Drivers. I install also Android SDK, but it doesn´t help.

The next problem is, i dont unterstand what do you mean with x/u boot images? I read this thread, but i dont unterstand this.
[LG Optimus L9 P760, P765, P768, P769] cgigate:
read another 100 times to understand the instructions.

also, forget your windows 8, it is junk, not suitable to do any work.
[LG Optimus L9 P760, P765, P768, P769] thomasoeli:
I have solved my problem! Problem is the deactivated driver signature.

"Open a Command Prompt window using the Run As Administrator option and enter follow command:"

BCDEDIT –Set LoadOptions DISABLE_INTEGRITY_CHECKS and press Return

BCDEDIT –Set TESTSIGNING ON and press Return

Then restart your PC and then you can install the "omap4boot" Driver.

"To disable this enter follow command:"

BCDEDIT –Set LoadOptions DISABLE_INTEGRITY_CHECKS and press Return

BCDEDIT –Set TESTSIGNING OFF and press Return

Now i can try to unlock my bootloader. By the way, I think Windows 8 is very good. ;)

Greetz
[LG Optimus L9 P760, P765, P768, P769] thomasoeli:
Bootloader is unlocked again

Hello,

i made it! :) The Bootloader was still unlocked! The info mesage has only been missing.

At first, i install the V20B.kdz from germany. After this upgrade i use this tool to unlock my bootloader. I press only number 2.

http://xdaforums.com/showthread.php?t=2190326

Then the surprise, the bootloader is still unlocked, only the message on the screen was missing. Here the screenshot, i was in fastboot mode.:laugh:

In the JB-Rom i tested the Bootloader Check with dial "3845#*760#". Scroll down to Bootloader Check. Here the picture....

Last but not least, the "Bootloader unlocked" message on Software Mode is back again. ;) See the picture...

Okay, i am back to my "old" V10B rooted with unlocked Bootloader! :laugh: I am waiting for the original update for V.A.E. I bought my phone in Dubai.

Finally, sorry for my simple english. I hope you understand me.

Greetings from germany.

Thomas
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
CROSSPOSTING! Please be aware it is not welcomed in XDA.

You posted here also and that was also OFFTOPIC. Control yourself.

http://xdaforums.com/showpost.php?p=40535185&postcount=205

By the way, what you achieved is not yet understood. Yes, may be your English is not very clear.
[LG Optimus L9 P760, P765, P768, P769] thomasoeli:
My post was for user "donk165". I think he has the same problem with the locked bootloader after the upgrade to V20 from Mexico.

http://xdaforums.com/showpost.php?p=40337377&postcount=33

"I would like to write in german." I just wanted to help. Sorry for my english. :crying:

Thomas
[LG Optimus L9 P760, P765, P768, P769] mitachemega1:
Help pressed "Y" on writing u-boot

Help me please,

I am following your tutorial and accidentally i pressed "Y" on writing u-boot.

Anyone can help how to recover my bricked L9 ? Desperately need your help.

i am using windows 7 32bit enterprise edition, with LG L9 P760 No Root, No unlock bootloder pre

thank you so much
[LG Optimus L9 P760, P765, P768, P769] Lelus:
two methods :

flash/unbrick

or

restore xloader and uboot, everything you need is in this thread
[LG Optimus L9 P760, P765, P768, P769] mitachemega1:
my problem is that I can not step into any mode my screen is black permanently if the phone is dead if you can help with more precise instructions:(

---------- Post added at 07:57 PM ---------- Previous post was at 07:52 PM ----------

Maybe I did something wrong but it didn't work..

What I've done:

Start fastboot

When the tools asked for u-boot replace, I said "Y".

fastboot replaced u-boot, then I ran "fastboot reboot".

Black screen. Removed battery and USB, polugged in battery and press power, still black screen.

---------- Post added at 08:01 PM ---------- Previous post was at 07:57 PM ----------

Until now I've used Samsung htch and washes very difficult to LG. Kindly help me
[LG Optimus L9 P760, P765, P768, P769] druiza:
I have same problem? Please help us...

I have same problem? Please help us...

p768g black screen not turn on, not S/W mode or fastboot, not logo LG or vibration the button ON. MY PHONE IS DEAD.
[LG Optimus L9 P760, P765, P768, P769] cgigate:
it is easy to fix, or you can sell it as "not working parts" on eBay, If you cannot understand to read.
[LG Optimus L9 P760, P765, P768, P769] sguerrini97:
You must enter fastboot again with this tutorial and flash a clean x-loader and / or U-Boot.

I fixed that problem many times....

Inviato dal mio LG-P760 con Tapatalk 2
[LG Optimus L9 P760, P765, P768, P769] paablo:
please help

where it appears that other / unknown device please respond (urgent) : (
[LG Optimus L9 P760, P765, P768, P769] cgigate:
you need read another twenty times with your speaker on
[LG Optimus L9 P760, P765, P768, P769] altvolt74:
bricked 3

can some one pull out x loader and uboot for lg p769
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Lelus already posted the x and u on this page (7th post down) http://xdaforums.com/showthread.php?p=39364344
[LG Optimus L9 P760, P765, P768, P769] sleepingturtle:
I have a rooted p769bk with jellybean and cwm stuck on the lg logo with security update, flashed u-boot and x-loader. I still can not get into s/w update no matter what I do so I flash a kdz file so I use my device. I still am stuck on the same screen. I would be fine with restoring stock recovery. This is extremely frustrating. Any suggestions? :confused:
[LG Optimus L9 P760, P765, P768, P769] Lelus:
You don't need to flash a kdz, download stock recovery p4_769.img fastboot your phone and do following :

fastboot flash recovery p4_769.img
[LG Optimus L9 P760, P765, P768, P769] sleepingturtle:
That was exactly what I needed. I did a hard reset afterwards and all is dandy. Thanks! Lelus
[LG Optimus L9 P760, P765, P768, P769] lecorbusier:
The LG usb drivers should also support fastboot. Or maybe any sync suite. I have no OMAP drivers installed, only LG and Huawei(my tablet) usb drivers and the MyPhoneExplorer suite.
[LG Optimus L9 P760, P765, P768, P769] MIXer9292:
u-boot problem((

(Sorry for my English)

I have the same problem. I have press Y on writing u-boot, now I have black screen.I tried to do fastboot, but it's block at "waiting for device".

Plz,plz,plz someone can explain how restore x/u-boot ?
[LG Optimus L9 P760, P765, P768, P769] Kid_Ding:
Try uninstalling all lg drivers. Then start the process again.
[LG Optimus L9 P760, P765, P768, P769] MIXer9292:
I find the file

p940-u-boot_fastboot.bin

in the

C:\omap4boot\files

maybe somewhere i can find same file for p760 ?? this way i can resolve the problem renaming the file and pathing another time
[LG Optimus L9 P760, P765, P768, P769] Lelus:
http://xdaforums.com/showthread.php?p=41768774#post41768774
[LG Optimus L9 P760, P765, P768, P769] MIXer9292:
THX

TNX, You save my a.s
[LG Optimus L9 P760, P765, P768, P769] mussi96:
i followed all your steps still when im in fastboot mode my computer simply fails to recognize it says the usb has malfunctioned.. please help i have unlocked the bootloader and want too root my phone and flash cwm ...any senior members out there who can help this noob to install fastboot drivers.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

LG OPTIMUS L9 p765 V20a
[LG Optimus L9 P760, P765, P768, P769] MIXer9292:
What happens when you write adb devices ?
[LG Optimus L9 P760, P765, P768, P769] cgigate:
read thread post #1 carefully another 100 times, you will get it
[LG Optimus L9 P760, P765, P768, P769] mussi96:
*daemon not running.starting.starting it now on port 5037*

*daemon started succesfully *

Lists of devices attached

2CAA0026*&^$##$$#@@#A012 device

---------- Post added at 06:00 PM ---------- Previous post was at 05:55 PM ----------

i tried more than 10 times it installs succesfully but when i go to fastboot mode by typing "adb reboot oem-unlock" which i learned from this thread..

http://xdaforums.com/showthread.php?t=2221102..it says usb not recognized it has malfunctioned :( ..ill post the screenshot in another few hours...
[LG Optimus L9 P760, P765, P768, P769] sguerrini97:
You don't have to type adb reboot oem-unlock, you will be in fastboot mode at the end of the tutorial with a black screen (not like the lg fastboot mode).

Inviato dal mio LG-P760 con Tapatalk 2
[LG Optimus L9 P760, P765, P768, P769] mussi96:
thanks ill try it out.. But how do I flash cwm after the black screen... using command prompt(noob question sorry)?
[LG Optimus L9 P760, P765, P768, P769] mussi96:
Help me out guys
[LG Optimus L9 P760, P765, P768, P769] sguerrini97:
Flash recovery:

fastboot flash recovery recovery.img

Inviato dal mio LG-P760 con Tapatalk 2
[LG Optimus L9 P760, P765, P768, P769] mussi96:
Thanks for your help
[LG Optimus L9 P760, P765, P768, P769] mussi96:
Finally installed fastboot drivers!! The trick is you have to plug in the battery before the 5sec message appears then in device manager in unknown device right click on the "lg u2" and hit update drivers. This should do the trick if you fail. Method by Gh0st.rpg.
[LG Optimus L9 P760, P765, P768, P769] hufger:
call me crazy but im having a hard time with this. I get my phone to the point where it has the lg logo. and says fastboot at the top. But I cant figure out what to do after that. Ive tried to start fastboot.exe( as thats what he is using in the screenshot there) but it just closes immediately and theres no chance of me being able to do anything with it like that. Anyone know what im doing wrong maybe?
[LG Optimus L9 P760, P765, P768, P769] cgigate:
it means this is not for you ...
[LG Optimus L9 P760, P765, P768, P769] Angenit:
You're awesome !!!! thanksss!
[LG Optimus L9 P760, P765, P768, P769] marcok82:
Flash bootloader on P760

Hello everyone this is my first post, it's a long time since I follow you, and you are really good,

because I've tried everything to unlock my bootloader on my P760 but I could not, I wanted to know, please, if I could flash a bootloader unlocked with this method, and if you like I can get it for me or do I change mine with a hex editor?

is there anyone who can help me ..... thanks

in Italiano

ciao a tutti questo è il mio primo post, è da molto che vi seguo, e siete veramente bravi,

siccome le ho provate tutte per sbloccare il mio bootloader sul mio P760 ma non ci sono riuscito, volevo sapere per favore se potevo flashare un bootloader sbloccato con questo metodo, e se si come posso procurarmelo o posso modificare il mio con un hex editor ?

c'è qualcuno che può aiutarmi..... Grazie :)
[LG Optimus L9 P760, P765, P768, P769] shark.sh:
quite similar problem.

the prequel >>>

i correctly unlocked my phone with v20b, and followed all the updates in real time till march. then i got problem with camera and i got to send my phone to assistance... when it came back it had locked bl and "fresh" jb v20b rom (i send it with a v10c rom because i tried to "recovery phone" from official lg program). the weird thing was that some passwords were already saved, even if it was a fresh install! in my opinion at assistance they simply changed my camera chip (damaged) doing a simple kdz-like install without wiping anything

now i'd like to know: is there anyone who posted/can post a jb bootloader (i think x-boot and u-boot right?) so that i can be sure to have a unlockable loader? because my situation about bootloader between ics and jb is more than strange...

all i want to do is to improve a little the stock rom! i'm not intersted in any modded rom (yet) since they're too buggy for me now... please... :crying:
[LG Optimus L9 P760, P765, P768, P769] nitev1:
Hi i got uboot problem because when the omap4boot ask about uboot i enternet "Y" and now i have black screen. If i'm right a need a u-boot file for my phone rom.

I have P760 with v20c JB 4.1.2 Poland any help with that file :(?

Anyone?
[LG Optimus L9 P760, P765, P768, P769] kuma82:
If you have the kdz, you can extract it yourself. Look for my guide in the general section.