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Flashed firmware of other phone on L7 II P715, bricked, KDZ/LGMST won't recover it

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Using KDZ, a friend installed a P700/705 ROM in his L7 II P715 (/P710/P713/P714) by mistake, following an outdated tutorial that led him to believe the ROM would be compatible.
Result: it's bricked and other people in some Brazilian forums have done the same mistake. I'm trying to help them.

If turned on normally it gets stuck in LG's logo screen. Hard factory reset using buttons or USB cable method doesn't solve the issue.
The user says he tried many ROMs (probably also L7 I ICS ROMs :x) and after installed some ROMs make white stripes appear in the screen and others will make the LG logo screen to blink.

If turned on with the right buttons to enter emergency I think it does normally.

LG Mobile Support Tool isn't able to recover it. It gets stuck in % / says unknown error.
Tried KDZ with PhoneMode Diag, Emergency and CS_Emergency, nothing will recover it. Attached is a screen of a failed try of putting the correct stock L7 II P715 firmware on it.

My idea: maybe we can recover it by flashing a custom recovery (via adb or something else that works in emergency or download mode) then he could flash anything in his phone including the correct kernel and ROM and everything should be fixed, but since unlocking the bootloader is a requirement (please correct me if I'm wrong) and it seems the only method of doing so requires a phone working normally it seems there's no solution.

The technicians from repair centers are noobs, they were unable to recover it (I think they don't even have a BOX for this device model) and blame things like the motherboard or screen.

Any help would be appreciated.
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Last edited by rafaelluik; 7th May 2014 at 12:10 AM.
 
 
8th May 2014, 03:58 PM |#2  
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Quote:
Originally Posted by rafaelluik

My idea: maybe we can recover it by flashing a custom recovery (via adb or something else that works in emergency or download mode)
Any help would be appreciated.

ADB need that your phone is on, if you can go in bootloader mode you can use FASTBOOT.
with fastboot you can flash a recovery..
maybe it can help you
9th May 2014, 03:44 AM |#3  
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Quote:
Originally Posted by AXD96

with fastboot you can flash a recovery.

Even with locked bootloader?
9th May 2014, 03:22 PM |#4  
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Quote:
Originally Posted by rafaelluik

Even with locked bootloader?

i dont know how u can go to fastboot mode without boot into the recovery or without adb.
but if you can get fastboot u can do something
28th July 2014, 02:45 PM |#5  
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I have exactly the same problem, P710 flashed with P700 firmware. Always stuck on IParam=14 :/ Anyone have some idea how to revive it?
29th July 2014, 04:35 PM |#6  
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Try to extract the official .kdz and flash it using LGFlashTool.

#F4UZAN : Team Optima
30th July 2014, 12:27 AM |#7  
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Quote:
Originally Posted by F4uzan

Try to extract the official .kdz and flash it using LGFlashTool.

I was having a conversation about that possibility in another thread, but phone doesn't enter Download Mode (I don't really know the key combination for that): http://forum.xda-developers.com/show...2781567&page=2
30th July 2014, 03:33 PM |#8  
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Quote:
Originally Posted by F4uzan

Try to extract the official .kdz and flash it using LGFlashTool.

#F4UZAN : Team Optima

How Can I extract this file? Phone is still in Emergency mode now.
I've got also bin file from vygis support, mayby it is correct file for lgflashtool?
Also, this program ask me for some dll file, where I can search it?

Thx for replies.
30th July 2014, 07:26 PM |#9  
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Quote:
Originally Posted by haller

How Can I extract this file? Phone is still in Emergency mode now.
I've got also bin file from vygis support, mayby it is correct file for lgflashtool?
Also, this program ask me for some dll file, where I can search it?

These are the instructions for L3 II, you can do the same to extract the KDZ and obtain the dll in the process for L7 II then flash it. Follow the instructions, but use a KDZ meant for L7 II instead of the one provided in the instructions. http://forum.xda-developers.com/show...php?p=51612244

Edit: correct link now.
Last edited by rafaelluik; 30th July 2014 at 07:29 PM. Reason: Corrected the link!!
30th July 2014, 07:38 PM |#10  
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Info 2 ;)
Quote:
Originally Posted by rafaelluik

These are the instructions for L3 II, you can do the same to extract the KDZ and obtain the dll in the process for L7 II then flash it. Follow the instructions, but use a KDZ meant for L7 II instead of the one provided in the instructions. http://forum.xda-developers.com/show...php?p=51612244

+1

Quote:
Originally Posted by haller

How Can I extract this file? Phone is still in Emergency mode now.
I've got also bin file from vygis support, mayby it is correct file for lgflashtool?
Also, this program ask me for some dll file, where I can search it?

Thx for replies.

you can try first
http://forum.xda-developers.com/show...4&postcount=19
*FOR DOWNLOAD MODE !!!!!!! NOTE !!!!!!!!! YOU MIGHT NEED TO PRESS VOL+ AND PLUG USB
OR VOL- AND VOL+ AND PLUG USB

if need to be i will guide you with kdz extraction (the .dll and .dz or .tot is inside kdz )
you don't need no mode for flashtool just phone off with the battery in and usb plugged in after you pressed start button
the tool takes the .dll and .dz or .tot depending on whats inside your kdz
Last edited by IGGYVIP; 30th July 2014 at 08:09 PM. Reason: link updated
31st July 2014, 11:21 AM |#11  
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Quote:
Originally Posted by rafaelluik

These are the instructions for L3 II, you can do the same to extract the KDZ and obtain the dll in the process for L7 II then flash it. Follow the instructions, but use a KDZ meant for L7 II instead of the one provided in the instructions. http://forum.xda-developers.com/show...php?p=51612244

Edit: correct link now.

I Extracted kdz file correctly, then using instruction from your link I tried to flash this phone, but this is showing under READY command:

PID: CD21S130403002965
Imei: Null
Initializing
::Error::
F0000002

Download Fail (5s)

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