LG G7 - Fastboot bootloop [SOLVED]

[ultragliss]

I had the same issue recently - the update went wrong at 91% and after forced reboot the fastboot mode only. Fortunately the phone is under warranty so I reported it and took back already from LGE service. They replaced the mainboard.

 

[mr3p]

Following instructions from Garlikus in post #13 I was able to exit Fastboot bootloop and return to downloader mode which allowed phone to be flashed back to normal.

 

[jazir]

Need help, same issue

 

[The_Soulless]

I have same issue.
My phone is G710PM converted UML, Try flash pie AWM20a with LGUP patched (download partition), but I no change the dll (mistake).
stuck fastboot, no enter Download mode
I have octopus LG box, enter edl mode, the first time do success frp done, but no enter download mode, this time octopus have a error while do frp proccess.
maybe the bootloader broken?
Garlikus's method not work

 

[The_Soulless]

repaired sucsessfull : D
You need medusa or medusa pro, seach in google "LG G7 G710VM 9008 repaired SUCSESSFULL"
I will not try to update again !

 

[caputcha]

Octoplus/Octopus LG 2.9.3

Reset FRP Lock
1. Attach testpoint, and connect phone with Micro USB cable (don´t use USB hubs!).
2. Check PC Device Manager, a new device should appear "Qualcomm HS-USB QDLoader 9008" or "Unknown Device" if you hadn´t installed a driver.
3. Release testpoint and press "Reset FRP Lock" button.

Emergency mode
To enter emergency mode, disconnect cable, disconnect battery, press and hold "Vol+" button and connect USB cable.

My lucky day

I tried this not successful !

 

[isavoro]

similar problem here. tried method in post #13 but no success. only achievement done i managed to put it stuck into boot logo instead of fastboot but no dl mode. i think it may depend on which laf.img you push via fastboot. i tried both the laf.imgs found into the pie's kdz with no success. tried to unpack my old oreo kdz but the laf file is in .bin format and cannot push it to the phone. i think we need an older laf.img.

or maybe i'm doing something wrong because i'm facing this for the first time in my life. is there a way i can use fastboot boot command with laf.bin?

 

[netookska05]

Cross flash back to stock Oreo and try again.

Sent from my LM-G710VM using XDA Labs

 

[isavoro]

Cross flash back to stock Oreo and try again.

Sent from my LM-G710VM using XDA Labs

you're missing the point of this thread. the aim is to recover phones who are stuck in fastboot mode without download mode, phones bricked by LGUP, with wrong dlls or who knows why, phones who lost download mode.

 

[netookska05]

Then rename the thread a troubleshooting thread.

Sent from my LM-G710VM using XDA Labs

 

[tripticonachos]

Any solution?

 

[The_Soulless]

The effective solution to resolve the problem is with medusa pro box, if you don't have access to one, consider a remote service.
I fix my G710PM with mesuda pro box.

 

[tripticonachos]

The effective solution to resolve the problem is with medusa pro box, if you don't have access to one, consider a remote service.
I fix my G710PM with mesuda pro box.

Any service what do you recomend? I need a remote service, because in my country ( Chile ) we dont have medusa. Thanks.

 

[The_Soulless]

Any service what do you recomend? I need a remote service, because in my country ( Chile ) we dont have medusa. Thanks.

In youtube, https://www.youtube.com/watch?v=WTEKoCtOZdw , But I fix my phone in my country, not remote, you can contact in whatsapp. I don't know if it's reliable

 

[Kobeecon]

Lost download mode

you're missing the point of this thread. the aim is to recover phones who are stuck in fastboot mode without download mode, phones bricked by LGUP, with wrong dlls or who knows why, phones who lost download mode.

I just lost my g7's download mode
Can you please help

 

[Dremo]

can you help me out using team viewer plssssssss

can you help me out

I had the very same problem as OP. I tried to install pie with LGUP (G710EM20b_00_OPEN_EU_OP_0508.kdz) but ended in fastboot loop.
After whole night of trying different things (being a noob means less sleep) I managed to run the phone in download mode. Starting from there I was able to install my previous rom. Both failed update and rescue operations were done on Win 10.

What I tried and didn't work:
- Fastboot --set-active=a

C:\ADB>Fastboot --set-active=a
Setting current slot to 'a'...
FAILED (remote: Slot Change is not allowed in Lock State)
finished. total time: 0.003s

- Unlocking with unlock.bin. Didn't save the msg but saw it somewhere in another thread. I needed to install/point drivers first because the device was not recognized in Win.
- Solutions for G6 for going into download mode. The download mode icon was displayed for a second and then going to fastboot again.
- LG Flash Tool 2014 - I just followed a guide for older phones but it didn't work. Didn't try again.

What did work:
1. I found this post on reddit (remove spaces or PM me, I'm not allowed to post links):

https:// www .reddit. com/r/LGG3/comments/2qe5sr/in_need_of_serious_help_stuck_in_fastbootno/cn5f2qr/?utm_source=share&utm_medium=web2x

Quoting the post
2. I used LG_Firmware_Extract_v1.2.6.1 and extracted dz file from aforementioned pie file. The I extracted two laf files for the kz file. In my case they were: laf.img_180534 and laf.img_81990.
3. I took one of these files (sry, don't remember which one, but they have the same size - didn't check if they're the same) renamed it to laf.img and put a folder where fastboot.exe is.
4. I did

fastboot boot laf.img

and voila: the phone was in download mode!
5. After that LGUP the previous rom and the phone is working again. Here I needed few tries. At first the were some problems, then I tried different combinations (1.14, 1.15, w/ and w/o uppercut). I think LGUP 1.15 (1.14 with patch) did the work. I was able to "refurbish" the phone.

Hope it's useful for others. If anyone could prepare a guide from this description or/and tell why it worked - please feel free to do so.

I think I will wait some time before trying pie again

 

[skromnia]

I had the very same problem as OP. I tried to install pie with LGUP (G710EM20b_00_OPEN_EU_OP_0508.kdz) but ended in fastboot loop.
After whole night of trying different things (being a noob means less sleep) I managed to run the phone in download mode. Starting from there I was able to install my previous rom. Both failed update and rescue operations were done on Win 10.

What I tried and didn't work:
- Fastboot --set-active=a

C:\ADB>Fastboot --set-active=a
Setting current slot to 'a'...
FAILED (remote: Slot Change is not allowed in Lock State)
finished. total time: 0.003s

- Unlocking with unlock.bin. Didn't save the msg but saw it somewhere in another thread. I needed to install/point drivers first because the device was not recognized in Win.
- Solutions for G6 for going into download mode. The download mode icon was displayed for a second and then going to fastboot again.
- LG Flash Tool 2014 - I just followed a guide for older phones but it didn't work. Didn't try again.

What did work:
1. I found this post on reddit (remove spaces or PM me, I'm not allowed to post links):

https:// www .reddit. com/r/LGG3/comments/2qe5sr/in_need_of_serious_help_stuck_in_fastbootno/cn5f2qr/?utm_source=share&utm_medium=web2x

Quoting the post
2. I used LG_Firmware_Extract_v1.2.6.1 and extracted dz file from aforementioned pie file. The I extracted two laf files for the kz file. In my case they were: laf.img_180534 and laf.img_81990.
3. I took one of these files (sry, don't remember which one, but they have the same size - didn't check if they're the same) renamed it to laf.img and put a folder where fastboot.exe is.
4. I did

fastboot boot laf.img

and voila: the phone was in download mode!
5. After that LGUP the previous rom and the phone is working again. Here I needed few tries. At first the were some problems, then I tried different combinations (1.14, 1.15, w/ and w/o uppercut). I think LGUP 1.15 (1.14 with patch) did the work. I was able to "refurbish" the phone.

Hope it's useful for others. If anyone could prepare a guide from this description or/and tell why it worked - please feel free to do so.

I think I will wait some time before trying pie again

Hey man, after I tried both laf files I got the message "Your device failed a routine safety check" and reboots to fastboot after a while. Can you help me out?

 

[skromnia]

If fastboot boot laf.img doesn't bring back Download Mode the only solution is Medusa or Octoplus via Teamviewer. That's what unbricked mine which unfortunately is not free.

 

[timkG]

Help Please

I had the very same problem as OP. I tried to install pie with LGUP (G710EM20b_00_OPEN_EU_OP_0508.kdz) but ended in fastboot loop.
After whole night of trying different things (being a noob means less sleep) I managed to run the phone in download mode. Starting from there I was able to install my previous rom. Both failed update and rescue operations were done on Win 10.

What I tried and didn't work:
- Fastboot --set-active=a

C:\ADB>Fastboot --set-active=a
Setting current slot to 'a'...
FAILED (remote: Slot Change is not allowed in Lock State)
finished. total time: 0.003s

- Unlocking with unlock.bin. Didn't save the msg but saw it somewhere in another thread. I needed to install/point drivers first because the device was not recognized in Win.
- Solutions for G6 for going into download mode. The download mode icon was displayed for a second and then going to fastboot again.
- LG Flash Tool 2014 - I just followed a guide for older phones but it didn't work. Didn't try again.

What did work:
1. I found this post on reddit (remove spaces or PM me, I'm not allowed to post links):

https:// www .reddit. com/r/LGG3/comments/2qe5sr/in_need_of_serious_help_stuck_in_fastbootno/cn5f2qr/?utm_source=share&utm_medium=web2x

Quoting the post
2. I used LG_Firmware_Extract_v1.2.6.1 and extracted dz file from aforementioned pie file. The I extracted two laf files for the kz file. In my case they were: laf.img_180534 and laf.img_81990.
3. I took one of these files (sry, don't remember which one, but they have the same size - didn't check if they're the same) renamed it to laf.img and put a folder where fastboot.exe is.
4. I did

fastboot boot laf.img

and voila: the phone was in download mode!
5. After that LGUP the previous rom and the phone is working again. Here I needed few tries. At first the were some problems, then I tried different combinations (1.14, 1.15, w/ and w/o uppercut). I think LGUP 1.15 (1.14 with patch) did the work. I was able to "refurbish" the phone.

Hope it's useful for others. If anyone could prepare a guide from this description or/and tell why it worked - please feel free to do so.

I think I will wait some time before trying pie again

Right after step 4 I keep getting
Sending 'boot.img' (36732 KB) OKAY [ 0.791s]
Booting FAILED (Status read failed (Too many links))
fastboot: error: Command failed

Please help

 

[dexx121]

In youtube, https://www.youtube.com/watch?v=WTEKoCtOZdw , But I fix my phone in my country, not remote, you can contact in whatsapp. I don't know if it's reliable

Not reliable at all. Left a nasty keylogger virus on my laptops. Fortunately, I have a few old laptops around for testing purposes, so no harm was done. BEWARE!