No possible way of getting into download mode. Please help. LG V20 H918 T-Mobile

[bqbase]

I was able to root my phone and use it for a while but then it started reboot for no reason. It is currently running Oreo, H91820h.

I tried to restore to different earlier back up but same issue and a whole bunch of apps complain and terminate itself. Tried to flash Lineage OS and same problem.

So I tried to use LGUP to restore it to stock image but cannot get the phone into download mode.

When I hold the volume down button and plug in the USB cable, I get the fastboot screen.

When I hold the volume up button and plug in the USB cable, I get the "Download Mode" icon for about 2 second and then it switches to TWRP screen.

I remember when I first tried to install TWRP, it was version 3.2.1-3. Then I tried to flash twrp version 3.3.1-0 but for some reason, sometime it boots up with version 3.3.1-0 and sometime it boots up with version 3.2.1-3.

I cannot flash anything in fastboot or adb since it always come back with "FAILED (remote: 'unknown command')".

I have tried for over a week, read everything I could on the internet and tried everything but without success in getting into download mode to reload the stock image with LGUP.

Could anybody provide any suggestion or an alternate way of restoring the stock image without requiring going to download mode? May be re-flash with a different twrp version or remove twrp completely so it doesn't show up when I press volume up and plug in the USB cable.

Please, I am desperate. I can even send you the phone if you think you can fix it.

Thanks.

 

[clsA]

I was able to root my phone and use it for a while but then it started reboot for no reason. It is currently running Oreo, H91820h.



I tried to restore to different earlier back up but same issue and a whole bunch of apps complain and terminate itself. Tried to flash Lineage OS and same problem.



So I tried to use LGUP to restore it to stock image but cannot get the phone into download mode.



When I hold the volume down button and plug in the USB cable, I get the fastboot screen.

When I hold the volume up button and plug in the USB cable, I get the "Download Mode" icon for about 2 second and then it switches to TWRP screen.



I remember when I first tried to install TWRP, it was version 3.2.1-3. Then I tried to flash twrp version 3.3.1-0 but for some reason, sometime it boots up with version 3.3.1-0 and sometime it boots up with version 3.2.1-3.



I cannot flash anything in fastboot or adb since it always come back with "FAILED (remote: 'unknown command')".



I have tried for over a week, read everything I could on the internet and tried everything but without success in getting into download mode to reload the stock image with LGUP.



Could anybody provide any suggestion or an alternate way of restoring the stock image without requiring going to download mode? May be re-flash with a different twrp version or remove twrp completely so it doesn't show up when I press volume up and plug in the USB cable.



Please, I am desperate. I can even send you the phone if you think you can fix it.



Thanks.

I'm not that familiar with the 918 ( I have 2 H910 )
But from the symptoms you described
I would guess that your MB is shot.

Even if you do manage to get into download mode you'll likely have errors flashing anything. I can look at the phone but it sounds like you need a replacement MB.

Sent from my Mi MIX 2S using Tapatalk

 

[bqbase]

I'm not that familiar with the 918 ( I have 2 H910 )
But from the symptoms you described
I would guess that your MB is shot.

Even if you do manage to get into download mode you'll likely have errors flashing anything. I can look at the phone but it sounds like you need a replacement MB.

Sent from my Mi MIX 2S using Tapatalk

Not sure what you mean by "MB". I don't think it means "motherboard" so my best guess is "master boot".
Where can I get a replacement MB and how to replace it?

 

[clsA]

Not sure what you mean by "MB". I don't think it means "motherboard" so my best guess is "master boot".

Where can I get a replacement MB and how to replace it?

Yes you need a motherboard
Or another phone

Sent from my Mi MIX 2S using Tapatalk

 

[Phoenix591]

I'm not that familiar with the 918 ( I have 2 H910 )
But from the symptoms you described
I would guess that your MB is shot.

Even if you do manage to get into download mode you'll likely have errors flashing anything. I can look at the phone but it sounds like you need a replacement MB.

Sent from my Mi MIX 2S using Tapatalk

Not sure what you mean by "MB". I don't think it means "motherboard" so my best guess is "master boot".
Where can I get a replacement MB and how to replace it?

Hold the phone here, the H918 can NEVER use fastboot to flash, thats why the lafsploit is used to replace download mode with a copy of twrp, leading many H918 users to have two different twrp installs.

To get download mode back flash this from the original lafsploit thread.

Rebooting for no reason is a bad sign (maybe see about replacing your battery if its the original one). Everything else (fastboot not working, download mode replaced by twrp)? Normal.

 

[bqbase]

Hold the phone here, the H918 can NEVER use fastboot to flash, thats why the lafsploit is used to replace download mode with a copy of twrp, leading many H918 users to have two different twrp installs.

To get download mode back flash this from the original lafsploit thread.

Rebooting for no reason is a bad sign (maybe see about replacing your battery if its the original one). Everything else (fastboot not working, download mode replaced by twrp)? Normal.

OMG, OMG, OMG, I got my download mode back. I am so appreciate your help. I wish I can send you a beer.

I must have gone through this lafsploit thread a hundred times but never paid attention to this "OPTIONAL" note and I wasted sooo much time refusing to post a question on this forum thinking I can find the answer just buy combing through the internet.

I believe you are dead on with reboot issue too. I got more than a few times with the phone complaining that wrong battery was inserted and need to shutdown. But I thought my un-experienced flashing of all the junks I did on the phone are causing it.

"OPTIONAL
If you would like to restore download mode onto your laf partition AFTER you have installed TWRP onto recovery:
Boot to TWRP that is on recovery
Flash this zip: laf_restore.zip
This can be done at any time after you are rooted. About the only reason you would want to flash laf back is if you use LG Backup.
TWRP has the ability to backup your phone, so I am not sure why someone would want this (maybe you are more comfortable with it?).
Also, flashing back to 100% unrooted stock can be accomplished by flashing a zip in TWRP, you don't NEED to flash a KDZ, but again, maybe you are more comfortable doing it that way.
The bottom line is TWRP on both laf and recovery is FAR FAR more useful than flashing laf back. You can test new versions of TWRP while keeping your old known working version (for example)."

 

[bqbase]

I'm not that familiar with the 918 ( I have 2 H910 )
But from the symptoms you described
I would guess that your MB is shot.

Even if you do manage to get into download mode you'll likely have errors flashing anything. I can look at the phone but it sounds like you need a replacement MB.

Sent from my Mi MIX 2S using Tapatalk

I just want to say thank you to clsA and Phoenix591 for the help. I found the answer and was able to successfully restore my phone to 100% stock. I know it's hard to pinpoint the issue while trying to understand all the craps that people post on their question. Hit or miss, right or wrong, work or not, I really appreciate all the effort that you did to help me figure out the solution.

 

[clsA]

I just want to say thank you to clsA and Phoenix591 for the help. I found the answer and was able to successfully restore my phone to 100% stock. I know it's hard to pinpoint the issue while trying to understand all the craps that people post on their question. Hit or miss, right or wrong, work or not, I really appreciate all the effort that you did to help me figure out the solution.

Guess I missed it on this one

V20 does have a lot of motherboard issue over the years. Apps crashing and phone rebooting randomly are 2 of them.

Glad you got it sorted and back to stock

Sent from my Mi MIX 2S using Tapatalk

 

[xpresotw]

Hold the phone here, the H918 can NEVER use fastboot to flash, thats why the lafsploit is used to replace download mode with a copy of twrp, leading many H918 users to have two different twrp installs.

To get download mode back flash this from the original lafsploit thread.

Rebooting for no reason is a bad sign (maybe see about replacing your battery if its the original one). Everything else (fastboot not working, download mode replaced by twrp)? Normal.

Thank you very much, i can Relock and unroot my device with this, thank you so much