[LG Optimus L9 P760, P765, P768, P769] Breex243:
OK, I have spend two full days and countless hours trying to figure this one out. Ideally, I think if I can just manage to flash the system.img file, I will be good to go. I have come across everything from the "Security Error" to getting back to where I started.

Current Status: Boots w/o security error, custom bootanimation plays, then crashes when trying to navigate past Welcome screen. I can get into S/W reset and fastboot modes. Hard Reset has occurred.

Background: Phone shipped with V20H firmware. I messed up during debloating and was experiencing crashes. I did a hard reset and now I get crashes when I boot into the Welcome screen--com.android.___ crashes when I tap "next". Never installed CWM or another recovery

(Failed) Attempts:

1a. I attempted to repair using the regular LG Customer Support Tool. If I boot into the Welcome screen or S/W update screen, LG would notify me that there were no updates for my phone.

1b. I was able to force the tool to attempt to update my phone my disconnecting it, then entering the IMEI, then reconnecting it in S/W update mode, but then on the "Downloading" step, it would just hang with no progress bar, even overnight

2a. I attempted to repair using the Offline flash method mentioned here:

and I would immediately get an error that my phone wasn't connected. I fastboot and clear cache according to the post here: http://xdaforums.com/showpost.php?p=48322382&postcount=773

2b. I follow the instructions to a tee and attempt to offline flash again, and I get the communication error message every time ~17%. I've unplugged and re-plugged in, I've tried shaking, I've tried older KDZ files, I get the same error. [shttp works--the picture of the girl works, V20H_00.kdz MD5 hashes to: 45ac85423ac6eb7d7a2e56055c602de5 (couldn't find any record of that hash on google though), V20D_00.kdz hashes to 0b456e0002fe577e3df13d839d275bf6, and I was able to prevent the LG Customer Support tool from updating (the current version has green, not the pink-ish, clean version now). Attempting to flash to V20D gets me to 20% before getting the communication error.

2c. If I let the LG CS tool update, it crashes immediately.

3a. I try fastboot and flashing ICS and get the security error when I attempt a regular boot

3b. However, now when I go into the (updated/current) LG CS tool, I get a message that there are updates to install, but once again when I try to DL them, the download of the update file never actually happens, even overnight.

3c. I extract the V20H.kdz into .img files and flashed them all except for system.img, which was too large to flash (PLEASE HELP with a workaround!). I no longer have the security error and and back to square 1.

3d. I try to do the offline flash again, still stuck without completion.

3e. I tried the KDZ_FW_UPD too, and it didn't work either.

Question: I see an "LGP920.dll" file in the KDZ flashing folder, do I need a .dll for my P769?

-----------LOGS BELOW-----

CS Flash tool log:

16:03:20 : [C:\LGMobileUpgrade] Try to delete folder

16:03:20 : RemoveDirectory1 Error(2):C:\LGMobileUpgrade

16:03:20 : Start Date : 2014-04-01 16:03:20

16:03:20 : ---------- QM Testmode ---------

16:03:20 : ***** Check Tool Version *****

16:03:20 : Tool version : 1.5.4.8

16:03:20 : UpgradeDLL version : 1.2.6.7

16:03:20 : Current Dir : C:\ProgramData\LGMOBILEAX\B2C_Client

16:03:20 : LGE USB Driver Version :

16:03:20 : Android PDLV Version :

16:03:20 : Android NDLV Version :

16:03:20 : ******************************************

16:03:20 : [C:\ProgramData\LGMOBILEAX\Phone] Try to delete folder

16:03:20 : SetEmerModeAT()

16:03:20 : _IsConnectedPhone Call

16:03:43 : _IsConnectedPhone(2)

16:03:43 : 0 - NotConnected.

16:03:43 : 1 - Normal connect success

16:03:43 : 2 - Emergency connect success

16:03:43 : *****CheckOS Start********

16:03:43 : Microsoft_Windows_XP_Professional_Service Pack 3

16:03:43 : *****CheckPCSyncPrograms Start*****

16:03:43 : PCSyncPrograms Not Found - OK and ready to upgrade

16:03:43 : Checking the connection with the cell phone...

16:03:43 : dwWaitResetTime(40000 ms)

16:03:44 : Phone Mode(2)

16:03:44 : *****GetPhoneType Start*****

16:03:44 : Phone Type : OMAP_IFX

16:03:44 : *****GetPhoneBinaryVersion Start*****

16:03:44 : *****Get ESN / IMEI / MEID Start*****

16:03:44 : ESN/IMEI/MEID : [Redacted]

16:03:44 : Phone type Compare start

16:03:44 : *****CheckPCSyncPrograms Start*****

16:03:45 : PCSyncPrograms Not Found - OK and ready to upgrade

16:03:46 : ****************CheckAndDownload********************

16:03:46 : ******Extract Start C:\Users\[Breex243]\Downloads\L9\V20H_00.kdz*****

16:03:46 : Model Dll Dir(C:\ProgramData\LGMOBILEAX\Phone\)

16:03:46 : File Size = 579310134

16:03:50 : Extract kdz file Success.

16:03:53 : Extracted C:\ProgramData\LGMOBILEAX\Phone\\V20H.wdb\n

16:03:53 : WDB(or DZ) FullPath(C:\ProgramData\LGMOBILEAX\Phone\\V20H.wdb)

16:03:53 : Extracted C:\ProgramData\LGMOBILEAX\Phone\\LGP769.dll\n

16:03:53 : Model dll FullPath(C:\ProgramData\LGMOBILEAX\Phone\\LGP769.dll)

16:03:53 : NNNNN WDB FullPath(C:\ProgramData\LGMOBILEAX\Phone\V20H.wdb)

16:03:53 : NNNNN Model dll FullPath(C:\ProgramData\LGMOBILEAX\Phone\LGP769.dll)

16:03:53 : Extract End C:\Users\RWang\Downloads\L9\V20H_00.cab

16:03:53 : ------------------Model.dll Information-------------------

16:03:53 : Filename : LGP769.dll

16:03:53 : Version : 0.0.7.0

16:03:53 : File size : 290816

16:03:53 : File date : 2013/04/30-13:50:00

16:03:53 : PC Created date: 2014/04/01-16:03:53

16:03:53 : ----------------------------------------------------------

16:03:53 : *****Check LGCM Programs Start*****

16:03:53 : LGCM Programs Not Found - OK and ready to upgrade

16:03:53 : *****WorkModelDLL Start*****

16:03:54 : strPhoneBinaryPath(C:\ProgramData\LGMOBILEAX\Phone\V20H.wdb)

16:03:54 : strModuleDir(C:\ProgramData\LGMOBILEAX\Phone\)

16:03:54 : strModelDLLPath(C:\ProgramData\LGMOBILEAX\Phone\LGP769.dll)

16:03:54 : _DetachDLL Call

16:03:54 : _DetachDLL Call End

16:03:54 : Call fn_StartUpgrade

16:03:54 : ********* 2Chip Model.dll input Parameter*************

16:03:54 : MODEL_EVENT : 32769

16:03:54 : PhoneBinaryPath : C:\ProgramData\LGMOBILEAX\Phone\V20H.wdb

16:03:54 : ModuleDir : C:\ProgramData\LGMOBILEAX\Phone\

16:03:54 : BootWaitTime : 49500

16:03:54 : UsbHighSpeed : FALSE

16:03:54 : PhoneMode : 2

16:03:54 : NewPhoneBinVersion : V20H_00

16:03:54 : ClearSI : FALSE

16:03:54 : AuthMark : 0

16:03:54 : ********* 2Chip Model.dll input Parameter End*************

16:03:59 : wParam : 2004, lParam = 7

16:03:59 : Step : TYPE_WPARAM_IFX_DN_POS

16:03:59 : wParam : 2007, lParam = 0

16:03:59 : Step : TYPE_WPARAM_READ_FILES

16:03:59 : wParam : 2004, lParam = 8

16:03:59 : Step : TYPE_WPARAM_IFX_DN_POS

16:04:31 : wParam : 2004, lParam = 9

16:04:31 : wParam : 2004, lParam = 10

16:04:32 : wParam : 2003, lParam = 97

16:04:32 : Step : TYPE_WPARAM_DOWNLOAD_FILENAME

16:04:32 : wParam : 2004, lParam = 15

16:04:32 : Step : TYPE_WPARAM_IFX_DN_POS

16:04:38 : wParam : 2004, lParam = 16

16:04:54 : wParam : 2004, lParam = 17

16:08:28 : wParam : 2010, lParam = 3013

16:08:28 : CleanModelDll() : Free Model.dll

16:08:28 : _DetachDLL Call

16:08:28 : _DetachDLL Call End

16:08:28 : Page_Error ºÎºÐÀÔ´Ï´Ù

16:08:28 : ¿©±â´Â Retry ºÎºÐÀÔ´Ï´Ù

16:09:54 : Call Retry Thread

16:09:54 : Checking the connection with the cell phone...

16:09:54 : Checking the connection with the cell phone...

16:09:54 : dwWaitResetTime(40000 ms)

16:09:58 : _IsConnectedPhone Call

16:11:54 : _IsConnectedPhone(1)

16:11:54 : 0 - NotConnected.

16:11:54 : 1 - Normal connect success

16:11:54 : 2 - Emergency connect success

16:11:54 : Phone Mode(1)

16:11:54 : *****WorkModelDLL Start*****

16:11:55 : _DetachDLL Call

16:11:55 : _DetachDLL Call End

16:11:55 : strPhoneBinaryPath(C:\ProgramData\LGMOBILEAX\Phone\V20H.wdb)

16:11:55 : strModuleDir(C:\ProgramData\LGMOBILEAX\Phone\)

16:11:55 : strModelDLLPath(C:\ProgramData\LGMOBILEAX\Phone\LGP769.dll)

16:11:55 : _DetachDLL Call

16:11:55 : _DetachDLL Call End

16:11:55 : Call fn_StartUpgrade

16:11:55 : ********* 2Chip Model.dll input Parameter*************

16:11:55 : MODEL_EVENT : 32769

16:11:55 : PhoneBinaryPath : C:\ProgramData\LGMOBILEAX\Phone\V20H.wdb

16:11:55 : ModuleDir : C:\ProgramData\LGMOBILEAX\Phone\

16:11:55 : BootWaitTime : 74250

16:11:55 : UsbHighSpeed : FALSE

16:11:55 : PhoneMode : 1

16:11:55 : NewPhoneBinVersion : V20H_00

16:11:55 : ClearSI : FALSE

16:11:55 : AuthMark : 0

16:11:55 : ********* 2Chip Model.dll input Parameter End*************

16:12:05 : wParam : 2004, lParam = 5

16:12:05 : Step : TYPE_WPARAM_IFX_DN_POS

16:12:25 : wParam : 2004, lParam = 6

16:12:30 : wParam : 2004, lParam = 7

16:12:30 : wParam : 2007, lParam = 0

16:12:30 : Step : TYPE_WPARAM_READ_FILES

16:12:30 : wParam : 2004, lParam = 8

16:12:30 : Step : TYPE_WPARAM_IFX_DN_POS

16:12:55 : wParam : 2004, lParam = 9

16:12:55 : wParam : 2004, lParam = 10

16:14:05 : wParam : 2010, lParam = 3000

16:14:05 : CleanModelDll() : Free Model.dll

16:14:05 : _DetachDLL Call

16:14:05 : _DetachDLL Call End

16:14:05 : Page_Error ºÎºÐÀÔ´Ï´Ù

16:14:05 : ¿©±â´Â Retry ºÎºÐÀÔ´Ï´Ù

shttp log:

12:30 [127.0.0.1:50467>9002] (t1 130) >Connection closed

!->01/04 16:12:30 [127.0.0.1:50467>9002] (t1 131) >HTTP in:0 out:0 Time:78

!->01/04 16:19:12 [127.0.0.1:50622>9002] (t1 132) >Connection closed

!->01/04 16:19:12 [127.0.0.1:50622>9002] (t1 133) >HTTP in:0 out:0 Time:16

!->01/04 16:19:51 [127.0.0.1:50632>9002] (t1 134) >Connection closed

!->01/04 16:19:51 [127.0.0.1:50632>9002] (t1 135) >HTTP in:0 out:0 Time:62

!->01/04 16:19:51 [127.0.0.1:50633>9002] (t1 136) >Connection closed

!->01/04 16:19:51 [127.0.0.1:50633>9002] (t1 137) >HTTP in:0 out:0 Time:16

!->01/04 16:19:51 [127.0.0.1:50634>9002] (t1 138)

GET /client/app/live_update.jsp HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache

!->01/04 16:19:51 [127.0.0.1:50634>9002] (t1 139) >HTTP in:99 out:6213 Time:62

!->01/04 16:19:51 [127.0.0.1:50636>9002] (t1 140)

GET /client/app/live_update.jsp HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache

!->01/04 16:19:52 [127.0.0.1:50636>9002] (t1 141) >HTTP in:99 out:6213 Time:15

!->01/04 16:19:52 [127.0.0.1:50637>9002] (t1 142)

GET /csmg/b2c/client/ftp_country_info.jsp HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache

!->01/04 16:19:52 [127.0.0.1:50637>9002] (t1 143) >HTTP in:109 out:42177 Time:31

!->01/04 16:19:52 [127.0.0.1:50638>9002] (t1 144)

GET /csmg/b2c/client/language_check_list.jsp HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache

!->01/04 16:19:52 [127.0.0.1:50638>9002] (t1 145) >HTTP in:112 out:2288 Time:15

!->01/04 16:21:30 [127.0.0.1:50691>9002] (t1 146)

GET /csmg/b2c/client/except_popup_model.jsp HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache

!->01/04 16:21:30 [127.0.0.1:50691>9002] (t1 147) >HTTP in:111 out:5501 Time:16

!->01/04 16:22:01 [127.0.0.1:50695>9002] (t2 148) >Connection closed

!->01/04 16:22:01 [127.0.0.1:50695>9002] (t2 149) >HTTP in:0 out:0 Time:0

!->01/04 16:22:01 [127.0.0.1:50696>9002] (t1 150)

GET /csmg/b2c/client/model_dll_mng.jsp?model=&buyer=&userType=QM HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache

!->01/04 16:22:01 [127.0.0.1:50696>9002] (t1 151) >HTTP in:132 out:275 Time:63

!->01/04 16:22:01 [127.0.0.1:50701>9002] (t1 152) >Connection closed

!->01/04 16:22:01 [127.0.0.1:50701>9002] (t1 153) >HTTP in:0 out:0 Time:16

!->01/04 16:22:06 [127.0.0.1:50702>9002] (t1 154) >Connection closed

!->01/04 16:22:06 [127.0.0.1:50702>9002] (t1 155) >HTTP in:0 out:0 Time:15

!->01/04 16:22:07 [127.0.0.1:50704>9002] (t1 156) >Connection closed

!->01/04 16:22:07 [127.0.0.1:50704>9002] (t1 157) >HTTP in:0 out:0 Time:15

!->01/04 16:22:07 [127.0.0.1:50705>9002] (t1 158) >Connection closed

!->01/04 16:22:07 [127.0.0.1:50705>9002] (t1 159) >HTTP in:0 out:0 Time:0

!->01/04 16:22:32 [127.0.0.1:50711>9002] (t1 160) >Connection closed

!->01/04 16:22:32 [127.0.0.1:50711>9002] (t1 161) >HTTP in:0 out:0 Time:16

!->01/04 16:22:32 [127.0.0.1:50712>9002] (t1 162) >Connection closed

!->01/04 16:22:32 [127.0.0.1:50712>9002] (t1 163) >HTTP in:0 out:0 Time:0

!->01/04 16:26:15 [127.0.0.1:50831>9002] (t1 164)

GET /csmg/b2c/client/model_dll_mng.jsp?model=&buyer=&userType=QM HTTP/1.1

Host: csmg.lgmobile.com:9002

Cache-Control: no-cache