yashsingh1/xdaforums huggingface dataset:
[LG Optimus L90] krusli:
The guide worked perfectly for me (D410)!

A few notes:

- I stripped a USB cable and took one of the four wires, stripped the ends and wrapped both copper ends around a straightened stapler bit each - this is so you can precisely short only the test point and ground.

- The phone isn't detected on my first try - in fact, I kept poking around for an hour or so. I found that touching the test point using the wire from the top worked, but not from the side. Also, just tape the other end of the wire to the Ground (GND) point so that your other hand is free to plug in the USB cable.

- I plugged in the microUSB cable to the phone, and plugged in the USB end AFTER shorting the points. This is much easier compared to connecting the microUSB port after the USB port.

- BoardDiag gave me a "device not in dload" error. To fix it, go to Device Manager, expand the COM ports section, right click the QDloader 9008 device, select Update Driver Software, follow the steps and point to the LG drivers in OP's post. Reboot your PC and try the steps again.

Once again, thanks a lot OP! Even LG's official service centre could not "repair" the motherboard, when in fact, we just have to reflash the files to go back to a working bootloader!
[LG Optimus L90] neverdies:
Thanks, for your report.

I'm glad to be helpful.

About the "device not in dload" error, can I use your info, and add it to the guide? There are many people facing that problem, and I didn't know how to solve it until now.
[LG Optimus L90] krusli:
Sure thing, go ahead!
[LG Optimus L90] shrisangram:
guys i need help

drivers are not installing

i disable driver signature verification

anything i doing wrong

currently on windows 7 64 bit & windows 8.1 64 bit

plz help me

sorry for bad english
[LG Optimus L90] akarb:
Shield

My D405 has such shield:

dropbox.com/s/8aow5vywmg0xycv/d405_mb.jpg?dl=0

It's probably most difficult step.

EDIT

Nevermind, it can be easily dismantled.
[LG Optimus L90] neverdies:
Try on windows 7 32 bit.
[LG Optimus L90] akarb:
It worked

I can turn on the phone now.

But now I have to solve a "security error" problem(photo):

dropbox.com/s/p7cpp9bat2qs8hx/d405_security_error.jpg?dl=0

...
[LG Optimus L90] neverdies:
Can't open the photo, please re-upload it.
[LG Optimus L90] akarb:
"Security error"

Photo(static link): dropbox.com/s/p7cpp9bat2qs8hx/d405_security_error.jpg?dl=0
[LG Optimus L90] neverdies:
Now you need to flash (offline) the KDZ suitable for your device.

Check this: http://xdaforums.com/lg-l90/general/guide-flash-stock-kdz-offline-lg-l90-t2803479
[LG Optimus L90] akarb:
Shorting the resistor turned out to be the easiest step.

My setup, it was quick: dropbox.com/s/9j5io2ivbwmncgx/d405_tool_setup.jpg?dl=0

I flashed all files from the list in the post using windows7 in a Virtualbox on a Ubuntu machine.

Phone turns on with a normal LG logo, then shows a logo with "Security error", and turns off after short time.

I can enter "download mode"(volume up pressed while plugging in micro USB cable), then "firmware upgrade" screen appears.

Though, the phone does not react to flashing.

LGFlashTool2014 always stops on 4% with "upgrade stopped due to an error". No matter what, different *.kdz versions.

One kdz downloaded from a site based on IMEI numbers. I also tried LG Mobile Support Tool that downloads KDZ file it sees suitable. Same error on 4%.

Some say on forums it's because of virtualbox. So I'm installing windows on a drive to test it.

The state of software on windows is saddening to me after many years of using Linux.
[LG Optimus L90] akarb:
OK, flashed successfully LG D405 to a latest stock *.kdz.

Initial flashing(9 files in a list) after resistor shorting was done using Virtualbox in Ubuntu host, from guest Windows 7 32 bit.

It worked.

LGFlashTool2014.exe fails in Virtualbox, it stops on 4% with "upgrade stopped due to an error".

Flashed *.kdz successfully using Windows 8.1 64 bit, without virtualbox.
[LG Optimus L90] zurikato:
hi i have a problem, b2b show this error no response from the device check PMIC first and if still boot prolem replace AP
[LG Optimus L90] neverdies:
Did you choose the correct com port?
[LG Optimus L90] zurikato:
yes all is correct
[LG Optimus L90] neverdies:
Give it a try with the "PMIC ON" option checked.
[LG Optimus L90] zurikato:
same error
[LG Optimus L90] neverdies:
Try AP check and nothing else.
[LG Optimus L90] zurikato:
nothing same error always with out battery and with battery
[LG Optimus L90] neverdies:
My last advice is to try the whole procedure again in another machine, I saw that you have other serial port devices, maybe it's some type of conflict.

The other possibility is an hardware defect. How did you bricked the phone?

Sorry but I know what could cause your's phone error.
[LG Optimus L90] enghassan:
please anyone help me

my device is recognized in device manager as qhsusb_bulk without the device driver but when install the driver qhsusb_bulk disappear

please anyone help me
[LG Optimus L90] chetankhunti:
Got It Repaired

I had hardbricked my LG D-410 while installing TWRP.

It was completely gone.

Phone wasn't booting up and showed as 63 MB FAT Device when connected to PC.

I sent the phone to service center and they replaced the old motherboard with a new one.

So if you are in warranty go for it.
[LG Optimus L90] sterling jose:
hey men. how can i make the test wire?
[LG Optimus L90] NikhilD410:
Test points

Awessome bro.This procedure saved the life of my D410.

But I still have a problem. That is the device worked fine for about 1 year on stock lollipop but reccently the touchscreen started misbehaving suddenly while i did not even install any new update.When I installed CM 12.1 ,the touch started working fine again.Then I again reverted back to stock rom and te same touch problem appeared again. I flashed it even with stock kitkat but the touch problem prevailed. So finaly I again installed CM 12.1 and it resolved the touch issue. So I m totally confused that how the touch problem may have arisen on stock rom..

Although cm 12 is working extremely awesome now but still i m curious as to what might have been the issue..

:D
[LG Optimus L90] neverdies:
I've also facing this problem.

At first I thought that could be some display damages, caused by the phone disassembly, but it isn't, I've bought a new display and the issue remains. I’ve also update touch firmware at hidden menu but no luck again.

Until now I thought that's something wrong whit my phone, but apparently it's caused by the unbricking process.

I think it’s some deep sleep problem, because after a while the screen begins to work normally, but to be honest I don't spent much time trying to understand what's causing the problem, as we have [MENTION=513620]Quarx[/MENTION] Rom's that works really good, and solve the screen problems.
[LG Optimus L90] Jerkov:
Hi, after this my phone come back from the hardbrick.. but now i have other problems, i can't install any kdz from the pc (idk why but i can't), i can't try to install a recovery because the phone got hardbricked again and even when i un-root the phone, the download mode still showing me "rooted" at the bottom of the rectangle. some suggestions? thx
[LG Optimus L90] neverdies:
What's the state of the phone right now? It’s working?

If it’s working, you need to flash an unlocked bootloader, suitable for your phone variant, then you can flash a recovery, and an custom rom, if you want of course.

If not working, repeat the unbricking process, then follow the previous explanation.
[LG Optimus L90] Jerkov:
its working but when i try to flash the aboot for v10c my phone got hardbricked and i need to repeat all the process again. im doing it with the archive frome the guide to unlock bootloader, the 1st time it works but the 2nd time hardbrick my phone and after that i can't try to unlock the bootloader again
[LG Optimus L90] neverdies:
What is the version of your phone (check under the sticker under the battery)?

After the unbricking process what’s the phone software version (Go to menu > general > about phone > Software information)?
[LG Optimus L90] Jerkov:
well never mind, i solve this problem flashing LL stock and unlocking the bootloader so now i have cm13
[LG Optimus L90] mariajohn:
l90 drivers

hi guys.. i'm new here. can anyone guide me hw to install L90 drivers...
[LG Optimus L90] lfom:
Drivers are linked in OP (Opening Post), download, unzip and run installer.
[LG Optimus L90] mariajohn:
thnx for d reply. i fixed that a long back. m mobile is working fine now.. :)
[LG Optimus L90] Lazgeor:
Guys my device is recognized in device manager under Ports (COM & LPT) as "LGE AndroidNet USB Serial Port (COM3)" and because of that, B2b doesn't see it. Help me if possible please. I don't know what to do. :(
[LG Optimus L90] neverdies:
Just go to device manager and uninstall it, then install the new drivers.
[LG Optimus L90] Trollu24-7:
i approve

this is soo usefull
[LG Optimus L90] saurav1481995:
i have the same issue..i had installed the latest drivers from lg..where do i reinstall the new drivers to get the phone in qhusb mode..

---------- Post added at 08:48 AM ---------- Previous post was at 08:41 AM ----------

i have the same issue..did you get it resolved..how????
[LG Optimus L90] Lazgeor:
Sorry but I couldn't do it my self. I was getting some errors and that my device wasn't recognized by the b2b program, even with the correct Qualcomm drivers. I tried many drivers but unfortunately none worked. So I took it this morning to a shop in order for them to fix it. Sorry if I bring bad news but I need my phone back as soon as possible and after trying every possible solution I found on this forum without success, I felt desperate and decided to pay to have it fixed. There may be a solution here but unfortunately none of them worked for me :( I have the D405n model and what I did exactly was that I flashed the bootloader of the KitKat version of the phone while I have upgraded to Lollipop. After that the phone does not responded at all, so that made it very difficult to get it fixed with simple methods. I wish you the best of luck in order to fix your phone, if you have any further questions feel free to ask, but If you can't find a solution, just know that at least it can be fixed by the service of a technology shop.
[LG Optimus L90] saurav1481995:
thanks for the reply...i guess i too will have to go to the repair shop..but did you disassemble the phone and complete the testwire procedure.
[LG Optimus L90] Lazgeor:
No, because when I plugged my phone into the pc, it instantly got recognized, and after installing the right drivers I looked exactly like the part 2 of this tutorial where he has already disassemble it, so I thought that I didn't have to do the disassembly part. And also, I was too scared to do that, cause if I did something wrong in the motherboard of the phone, I was afraid that not even the repairman could fix it. So that's why I decided to leave it as it is and take it for repair. I'm not sure that if I had done that part it would have made any difference. Hope I helped! :)
[LG Optimus L90] NikhilD410:
Go to device manager in Computer properties.When it shows QHSUSB_bulk right click and then browse to the drivers file you downloaded and install from there
[LG Optimus L90] saurav1481995:
my device too is getting recognized but its showing lgeandroidusb net instead of qhsusb bulk..:(:(

which drivers do i need to install to get into qhsusb mode...
[LG Optimus L90] yoanmcruz:
Hi, I have tried everything and my cel not leave the error "device was not found in dload trying flash programmer," I reisnlado the one driver and again and nothing helps my cell is a lg d415, sorry for the English, I'm from Cuba.
[LG Optimus L90] NikhilD410:
After installing CM 12 in my D410 ,the total internal memory which used to be around 8 GB is now reduced to 3.75 GB.I dont know how to recover that lost memory.Any advise??

I wiped dalvik cache,data,internal storage,system and cache while flashing but still no change.
[LG Optimus L90] amy1997:
how to connect GND ?

Hi tried but didn't get how to do that i am a beginner can you please explain in details ? please i really need to understand my phone sucked in hard brick :(:(:(
[LG Optimus L90] Gorgolemis:
Cause i have problem with my sons mobile phone (hardbrick ,device manager shows Qualcomm HS-USB QDLoader 9008 )i m looking for solution 3 days now,i have spend many many hours ,day and night for it ,i ask for solution,i send e mails for help ,or to donate someone for help, but noone answer.

I think its time to give up.
[LG Optimus L90] Gorgolemis:
Hello and thank you for response.

I follow this post but after step 5 i cant continue ,there is no drive letter can you explain with simple words steps 6 and 7? For example Run the program to record the image IMG DiskImageRev2 I open the disk imager find the loader d405 img and then nothing happens,Specify the path to the downloaded and extract the image LOADER.IMG i cant do that.
[LG Optimus L90] Lazgeor:
Hello again, sorry about the instructions, indeed they are not very clear, this is how the person in the other post typed them. Anyway, what I did on step 5 was that when I went to My Computer, there was my phone and all i saw underneath it was a FAT. It means that it's a drive but it's not formated. What I did was right click to it and then click to format. I did not change any of the defaults that windows suggested for the device and I clicked to format it. After it was done, the phone had about 7,89 GB free storage. If you make it to this point, then you can continue. I also hope that you have not removed your phone from the PC.

---------- Post added at 02:46 PM ---------- Previous post was at 02:38 PM ----------

In step 6, you have to run the program DiskImageRev2.exe that you downloaded from the link above. You click that little folder icon and you find and open the loader_D405.img OR loader_D410.img, depends on which one you downloaded. After that, on the device you have to select your phone, that 7,XX GB (XX because I don't remember the exact MB's that drive was) and the follow the tutorial again, you click on that little box that says MD5 Hash, and when it's ready you click on Write. When it's over, you follow the tutorial again. Ask me again if you didn't understand something.

---------- Post added at 02:57 PM ---------- Previous post was at 02:46 PM ----------

Sorry, I forgot to quote you so I'm not sure if you got notification about my new replies. Check below to find them. I hope I helped you!
[LG Optimus L90] Gorgolemis:
I also hope that you have not removed your phone from the PC when i make format same as you the pc freezes and i removed the usb wire from pc,from that point i cant see the storage of mobile phone that is the problem and i cant to proceed to next step.:(:(:(:(:(.

I messed up :(:(:(
[LG Optimus L90] Lazgeor:
Maybe it's not that bad. Try to restart the computer and use another usb port to connect the phone with the pc. Maybe that'll fix the problem. Also tell me what Windows you're using. I used Windows 10. I don't know if that did anything but I don't know.
[LG Optimus L90] Gorgolemis:
Im trying another usb,also change pc with xp and windows 7 but nothing the storage device disappeard :(:(

Im using windows 10 32 bit.
[LG Optimus L90] Lazgeor:
Well that is a problem that I don't really know how to solve, since we have the same Windows and you tried switching ports :( I suggest that you go to the Original Post and send a message to the guy that posted the instructions. His first comment is below some other comments. Once you find it, explain to him what happened. Mean while I'll search too for a solution and I'll respond to you once I've found something.
[LG Optimus L90] Gorgolemis:
What can i say thank you very much .

I will do that.i send a message .
[LG Optimus L90] Lazgeor:
I've got an idea, when you plug your device into the PC, go to device manager and check if there are any unrecognizable devices. If there are, try to install the drivers. If they cannot be installed, then there is another thing you could try. Open a program called Computer Management and then in the left side open the Disk Management. If your phone is listed in that list then you can try to format it from there. If not then we'll just keep searching for another solution.
[LG Optimus L90] Gorgolemis:
When i go to device manager i saw QHSUSB_BULK then i follow this post http://xdaforums.com/lg-g2/general/fix-unbrick-lg-g2-stuck-qualcomm-hs-usb-t2933830 and on device manager i see now Qualcomm HS-USB QDLoader 9008 .

I already went to disk managment but there is nothing of my mobile storage .

For now im trying to follow this post without result at the moment cause i dont have a tot file for my device (LG L90 D405n).Im looking for it but with no result,i think isnt exist for my device :(:(.

I spent already to much time for it (3 days )I do not know if it's worth,some times i dont know what im looking for ,im very confused :(:(

Thank you friend any way.:):)
[LG Optimus L90] Lazgeor:
There are some people on this post that say that they found a tot file! Here's the link: http://xdaforums.com/lg-l90/general/tot1-omg-t3099367 I think it's for the d410 model, so if you don't have this one then you have to keep searching. If you have it however then you're in luck :) Also, click the link on the third comment, the link on the first one doesn't work.

---------- Post added at 08:20 PM ---------- Previous post was at 08:11 PM ----------

Also I just wanted to add something, last week, because I was so tired of trying to fix my phone, I called LG and told them what I did and how much it would cost for them to fix it. They told me that in order for them to fix it, they would replace the board and that would cost about 140 euros. It really isn't worth sending this device for repairs, because I bought this device with even less money. Now I don't know where you live, but in my Country (Greece) this is how much it costs. My recommendation is to try every solution possible, and if you have a friend or close person to you that can help you, you can ask them for their help. I'll keep searching for a way to help you, but if I don't manage to find anything, I hope you can manage to fix this. Best of luck! :)
[LG Optimus L90] Gorgolemis:
Im from Greece too!!!From a small town, and as you know and i know dont worth it to send them for fix .

Im keeping to looking for solution but im too tired and dissapointed ,if i knew how dificult it is will ever not touched the device of my son .Now he saying me all the time ,this is your fault, i lose this ,i lose that mpla mpla mpla,buy me another phone etc.

Any way thank you very much for your interest :):)
[LG Optimus L90] Lazgeor:
Lol we're both from Greece, that's great :p Sorry that I couldn't help you :( Yeah I keep thinking that I had never messed with my phone too. Well the best thing you can do about your son, if you don't manage to fix this phone, is to buy him a new, cheap phone. I can recommend you one of you want. I really hope you can find your way out of this mess.

P.S. Search on Google about Low Level Format on phones/flash drives/hdd and other things like these. This is what has happened to your son's phone now. If you find a way to format it, then you can return to step 6 of my tutorial.
[LG Optimus L90] Gorgolemis:
Well....... im trying.

As for my son he takes mine (xiaomi mi3) im without phone now :p

Thank you again πατριώτη (patriot).:):)
[LG Optimus L90] Gorgolemis:
Finaly i managed to foollow all steps from part1 until 2.9 with success but with no result ,it still to remains with Qualcomm HS-USB QDloader 9008 .

No boot ,cannot enter download mode ,no logo ,no fast boot.

For the history,im tried to root the device with no result and the device bricked,then i follow this guide for unbrick http://xdaforums.com/lg-l90/help/bricked-d410-t3094018 but on step 3 when i tried to format the storage my pc freezes and i pull out the usb wire ,from that moment i lose the device dont regnonise from pc ,and then i follow this guide but with no result again.

I make all tests with b2b when i finished the flash (AP Check,EMMC,SDRAM all test result are PASS) but it still to remains with Qualcomm HS-USB QDloader 9008 .

If some one is willing to help me from here or via team viewer and unbrick the device (if that is possible )i will donate him.

Regards
[LG Optimus L90] neverdies:
Did you actually flashed the aboot, BackupGPT, boot… files, or just run the test procedure?
[LG Optimus L90] Gorgolemis:
i flashed the all files that you mention in your post one by one and when i finished the flash i make the tests pass.

I think the problem is the mistake that i make with format at the previous efort?

Im trying now to extract the kdz file for 405n to tot file or bin for flashing again but i cant.it is difficult .

I meshed up.
[LG Optimus L90] neverdies:
The test procedure is made before flashing the files, not after.
[LG Optimus L90] Gorgolemis:
I make before flash the test procedure AP check and EMMC,when the flash finished i make the test procedure of AP check,EMMC and SDRAM Test and all pass.

Its no right?
[LG Optimus L90] clapamarius:
please help

i have a lg l90 405n and i flash recoverey then my phone is now dead.
[LG Optimus L90] Gorgolemis:
What did you see on device manager of your windows?
[LG Optimus L90] amy1997:
Thanks bro Love you ^_^

Thanks BRO you are Great it worked thank You very much bro thanks thanks 100 of times
[LG Optimus L90] Gorgolemis:
Finaly the device working again thanks to you ,i follow the whole project from the begining and the device working again.:):):):):)
[LG Optimus L90] dzarates:
EMMC Fails!!

Hi there.

I've been following the post looking for an answer to unbrick my phone.

I did the complete process, but after clicking "Start" the result is:

AP: Pass

EMMC: Fail

I've tried with all the USB Ports, but the result is always the same, any idea about what can I've been doing wrong?

Thanks!!
[LG Optimus L90] neverdies:
Try to disconnect the phone and do the test again.

If it keeps failing try to proceed anyway, maybe you got luck.

If not switch from "Read/Write" to "Erase" in option combobox and press “START” button.

Attention: This will wipe the phone's memory, you'll probably lose the IMEI too(it could be restored after the unbricking process).

After that switch back to "Read/Write" and test again.

If you get fail again your phone has a bad emmc chip, and you can't recover it unless you swap the emmc chip for a new one.
[LG Optimus L90] neutrondev:
Works as intended. :) good job bro.
[LG Optimus L90] alikelle:
Thank you very much.

Good Work. it Works.
[LG Optimus L90] Seengaa:
Unbrick L65

Hi. I have my friends L65 to unbrick, i hope your thread will help me, cause i really cant find anything like this for the L65. Somehow i managed to get a pic about the L65 motherboard and test point and GND, so i can use it with your tutorial, my problem is that i cant find the second zip file for this L65 (meaning the "hardbrick.zip"). I already have the drivers, so its okay. Can you please help to get that file from somewhere?

Thanks a lot
[LG Optimus L90] ham4ever:
sh*t man , u helped me , this worked for me to boot the phone, the phone was dead and u are the hero :D:D
[LG Optimus L90] mattandhimself:
My phone fails the check and the dialog says to "check pmic" any recommendations?
[LG Optimus L90] AlexUnderKH:
If you do not want to scrub hot melt parts from the phone, you can use paper glue tape. May be topic starter will add my photos in general post? :)
[LG Optimus L90] mattandhimself:
I get "failed to connect, check pmic, otherwise replace AP"
[LG Optimus L90] Memnonas:
Target dir.

First of all thanks for the guide. That really was my last chance of fixing my lg D405n. Can you please specify what "Target dir" refering to ? it should be the folder with the stock files ? or just a random empty folder ? Sorry about this silly questing i am really new to this ... thanks again :)
[LG Optimus L90] TheHeretic666:
Thank you very much worked on lg l90 d405 and again thank you
[LG Optimus L90] sanjay.dabhi:
this i not woring on d415 tmo.

if any other solution please help