[LG Optimus L9 P760, P765, P768, P769] Rosso Corsa:
Still not able to unbrick...

Dear all,

I am not able to recover my P760 from a "soft brick" due to an aborted flash of a stock ROM. Here is the story.

First of all, I tell you I attach to my post 3 small figures, I refer to them in the description that follows. OK let's start...

Here I describe how I went into troubles...

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I started working with this LG phone:

Model: L9 P760 (Vodafone brand)

OS Android 4.1.2 Jelly Bean (it was previously updated form ICS through the official upgrade from LG)

SW Version: P760 20d-262-02

Kernel: 3.0.31

Build: JZ054K

Baseband: L626_MODEM_SIC_01.1230.00

My goal was to re-flash with another JB stock ROM, so upgrading its release and getting an unbranded phone.

I downloaded this stock ROM kdz file: V20H_00.kdz

Then I tried to flash with a procedure derived from this one:

http://xdaforums.com/showthread.php?t=2085344

The main difference was related to the fact that I did not put the smartphone in S/W Upgrade status at the beginning, I connected it to USB port when it was power on and set the PhoneMode to "DIAG" instead of "EMERGENCY". The phone went in "S/W Upgrade" mode during the flash procedure.

I worked on my laptop, the operating system is Windows 7 Professional, SP1 64 bit.

A problem occurred during the update: the LG Mobile Support Tool crashed and the phone remained in "S/W upgrade" status. I restarted the LG Mobile Support Tool, but I was not able to make it continue the update. Then I disconnected the phone from USB and removed the battery. When I re inserted the battery the phone did not boot anymore.

Now my LG L9 P760 does not start pushing the normal power on button.

It does not make a factory reset if I push Power on, home and vol- buttons

There are no any combination of buttons I can start for having any reaction from my LG L9.

And now I describe what I did for trying to recover...

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After having tried several other recovery procedures without success I tried the one described in this thread. I got the original bin file for a P760 indicated by BajoPrimate here:

http://xdaforums.com/showpost.php?p=53820375&postcount=44

Then I followed the procedure described in this thread.

I had no problems in going to S/W Upgrade mode.

The only thing is that on my device display periodically the message "S/W Upgrade" disappears.

In more detail, Waiting for 1 or few minutes without doing anything the "S/W upgrade..." message disappears on my LG display. It is like the connection between the smartphone and the LG Mobile Support Tool could not be kept, or was not stable. Anyway, after a while the "S/W upgrade..." message comes back on my P760 display, it is like it periodically tries to reconnect to the server.

Anyway, following the procedure I got 2 types of error. The first one is illustrated in attached figure 1. It seems the server is not able to detect the connected smartphone connected on port 41. It could be related to the "flashing" S/W Upgrade on the 760 display I described above. If I repeat the procedure, not always I get this type or error, sometime I get immediately the error described hereunder.

After a while, the server retries automatically to connect to the smartphone, and this time it detects the P760.

But when the server tries to start the binary download, after 6 seconds it gets a "startDownload Exception" (code F0000002) and the procedure fails.

If I wait for a while, the server retries the procedure, but always fails with this Exception (F0000002).

Pls see attached figures 2 and 3 for the details of what is displayed on the server.

From fig. 3 you can see that at the start of this procedure the server is unable to find any value for the PID and the IMEI of my P760, I do not know if that is normal and occurs also when the procedure is completed successfully (I read a lot of comments in this thread indicating that several people were able to unbrick their P760 with this procedure, unfortunately I am in the group of people who were not able to get this result... :crying::crying:).

Anyway, the type of problem here seems to be related to the fact that the server tries to work with a .fls file instead of with a .bin file, as expected. It is exactly the same problem that nookle (among many others) explains here:

http://xdaforums.com/showpost.php?p=56254277&postcount=63

Now I really do not know what other procedures or tools I could try.

I could try to repeat the same procedure installing all the tools and bin images on another Win 7 laptop, or perhaps I could try with another version of LG drivers... also if from the device manager I see exactly the LG drivers indicated in the procedure, and in the end the server is able to detect my smartphone (also if its "S/W Upgrade" mode disappears and then comes back during the procedure, as I explained above): when I see the F0000002 exception the server has already detected the smartphone on port 41.

I am convinced it should not be a so big issue to recover from this SW brick, but fore some reasons I am blocked here since several weeks ago!

Could anyone suggest me any other try before I go to LG support?

A special thank to BajoPrimate for his very kind and patient support, but unfortunately after a lot of tries I am still with a software bricked P760.

Thank you all very much in advance.

Ciao

Mauro