[Q]How to downgrade from jellybean to ics? i use kdz - LG Optimus L9 P760, P765, P768, P769

My phone is lg p760
When i use kdz i get this error at 7%
[R&D Test Tools Log File]
09:38:23 : Launching SW update
09:38:23 : Unpacking KDZ
09:38:48 : KDZ file extraced
09:39:25 : Files were extracted.
09:39:25 : LGMobileDL Load.
09:39:25 : Port = -1
09:39:25 : Connecting to phone
09:39:42 : Check Phone mode = 1
09:40:09 : Phone type check.......
09:40:42 : _DetachDLL Call
09:40:42 : _DetachDLL Call End
09:40:42 : Param : Path = C:\Documents and Settings\All Users\Application Data\LGMOBILEAX\Phone\V10A.wdb
09:40:42 : Param : moduleDir =
09:40:42 : Param : waitTime = 0
09:40:42 : Param : UsbHighSpeed = 1
09:40:42 : Param : PhoneMode = 1
09:40:42 : Param : BinVersion = v10a_00
09:40:42 : Param : AuthMark = 0
09:40:42 : Call fn_StartUpgrade
09:40:42 : CDMA: wParam = 2004, lParam = 5
09:40:42 : Model Dll Msg Not Found(2004, 5)
09:40:59 : CDMA: wParam = 2004, lParam = 6
09:40:59 : Model Dll Msg Not Found(2004, 6)
09:41:29 : CDMA: wParam = 2004, lParam = 7
09:41:29 : Model Dll Msg Not Found(2004, 7)
09:41:29 : CDMA: wParam = 2007, lParam = 0
09:41:29 : Model Dll Msg Not Found(2007, 0)
09:41:29 : CDMA: wParam = 2010, lParam = 3002
09:41:29 : Model Dll Msg Not Found(2010, 3002)
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I get the same error with 10a italy, 10a baltic, 20c italian
I can install 20dbaltic and 20b without a problem
What's wrong? i'm using the same method
I tried offlinefix too
17:50:48 : Call Retry Thread
17:50:48 : [009,700,229,240,235]- SOFTWARE UPDATE
17:50:48 : Checking the connection with the cell phone...
17:50:48 : dwWaitResetTime(40000 ms)
17:50:52 : _IsConnectedPhone Call
17:51:08 : _IsConnectedPhone(1)
17:51:08 : 0 - NotConnected.
17:51:08 : 1 - Normal connect success
17:51:08 : 2 - Emergency connect success
17:51:08 : Phone Mode(1)
17:51:08 : *****WorkModelDLL Start*****
17:51:08 : _DetachDLL Call
17:51:08 : _DetachDLL Call End
17:51:08 : strPhoneBinaryPath(C:\ProgramData\LGMOBILEAX\Phone\V10A.wdb)
17:51:08 : strModuleDir(C:\ProgramData\LGMOBILEAX\Phone\)
17:51:08 : strModelDLLPath(C:\ProgramData\LGMOBILEAX\Phone\LGP760.dll)
17:51:08 : _DetachDLL Call
17:51:08 : _DetachDLL Call End
17:51:08 : Call fn_StartUpgrade
17:51:08 : ********* 2Chip Model.dll input Parameter*************
17:51:08 : MODEL_EVENT : 32769
17:51:08 : PhoneBinaryPath : C:\ProgramData\LGMOBILEAX\Phone\V10A.wdb
17:51:08 : ModuleDir : C:\ProgramData\LGMOBILEAX\Phone\
17:51:08 : BootWaitTime : 74250
17:51:08 : UsbHighSpeed : FALSE
17:51:08 : PhoneMode : 1
17:51:08 : NewPhoneBinVersion : v10a_00
17:51:08 : ClearSI : FALSE
17:51:08 : AuthMark : 0
17:51:08 : ********* 2Chip Model.dll input Parameter End*************
17:51:08 : wParam : 2004, lParam = 5
17:51:08 : Step : TYPE_WPARAM_IFX_DN_POS
17:51:24 : wParam : 2004, lParam = 6
17:51:29 : wParam : 2004, lParam = 7
17:51:29 : wParam : 2007, lParam = 0
17:51:29 : Step : TYPE_WPARAM_READ_FILES
17:51:29 : wParam : 2010, lParam = 3002
17:51:29 : CleanModelDll() : Free Model.dll
17:51:29 : _DetachDLL Call
17:51:29 : _DetachDLL Call End
17:51:29 : Page_Error ºÎºÐÀÔ´Ï´Ù
17:51:29 : ¿©±â´Â Retry ºÎºÐÀÔ´Ï´Ù
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Be sure to have a decent battery level, and a reliable USB. Now, for the solution to your specific problem, I don't know it. HOWEVER, here is some help. WHEN you do get it to work, remember that you must perform a hard-reset after flashing to ICS, then you can boot into it. Otherwise it won't work.

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All letters must be big,like this V10A_00.kdz or V20C_00.kdz(.kdz is small).If you downloaded adn ti was some thing like this v20A_00.kdz or V10a.kdz you must rename it.

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tune off your wifi device.and be sure LG modem device in your devive maneger

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shomi190 said:
All letters must be big,like this V10A_00.kdz or V20C_00.kdz(.kdz is small).If you downloaded adn ti was some thing like this v20A_00.kdz or V10a.kdz you must rename it.
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oh yea now that you mention it the files that didn't work are not in capital letters