[LG Optimus L90] lfischer:
Coming from rooted (aboot, ...) D405n v10d I tried the Resurrection Remix rom. I flashed with CWM, forgot to wipe data and am stuck in a boot loop now. CWM is gone . The only thing that seems to work is the download mode (Hold Vol+ while plugging in), but it says "USER B100 - ROOTED" below the progress bar.

Using the LG Flash Tool 2014 and trying also the original LG Mobile Support Tool I tried to unbrick, but on 4 Different OS (Virtual: XP SP3, Win7 32bit, Win8.1 64bit from modern.ie, Native: Win8.1 64bit) in many tries I always end up with an error after 2% Progress of software upgrade.

I found the logfile created by the LGUserCSTool.exe and the last error is always "TYPE_WPARAM_UPGRADE_ERROR".

Please help, i'm stuck.

15:41:11 : Start Date : 2015-06-10 15:41:11
15:41:11 : -------- QM_Version mode ---------
15:41:11 : ***** Check Tool Version *****
15:41:11 : Tool version : 1.7.5.0
15:41:11 : UpgradeDLL version : 2.1.5.5
15:41:11 : Current Dir : C:\ProgramData\LGMOBILEAX\B2C_Client
15:41:11 : LGE USB Driver Version :
15:41:11 : Android PDLV Version :
15:41:11 : Android NDLV Version : 3.14.0.0
15:41:11 : ******************************************
15:41:11 : [C:\ProgramData\LGMOBILEAX\Phone] Try to delete folder
15:41:11 : SetEmerModeAT()
15:41:11 : _IsConnectedPhone Call
15:41:22 : _IsConnectedPhone(2)
15:41:22 : 0 - NotConnected.
15:41:22 : 1 - Normal connect success
15:41:22 : 2 - Emergency connect success
15:41:22 : *****CheckOS Start********
15:41:22 : Microsoft_Windows7_Professional_Service Pack 1
15:41:22 : *****CheckPCSyncPrograms Start*****
15:41:23 : PCSyncPrograms Not Found - OK and ready to upgrade
15:41:23 : Überprüfung der Telefonverbindung
15:41:23 : dwWaitResetTime(40000 ms)
15:41:24 : Phone Mode(2)
15:41:24 : *****GetPhoneType Start*****
15:41:24 : Phone Type : CDMA_2CHIP
15:41:24 : *****GetPhoneBinaryVersion Start*****
15:41:24 : Phone Bin Version : D40510D_00
15:41:24 : *****Get ESN / IMEI / MEID Start*****
15:41:24 : ESN/IMEI/MEID : 352763060106678
15:41:26 : Check Backup and Restore model
15:41:26 : Skip Backup and Restore - Emergency mode
15:41:26 : Phone type Compare start
15:41:26 : *****CheckPCSyncPrograms Start*****
15:41:26 : PCSyncPrograms Not Found - OK and ready to upgrade
15:41:27 : ****************CheckAndDownload********************
15:41:27 : Version : D40520A_00
15:41:27 : !!*****OpenURL Start*****!!
15:41:27 : [C:\ProgramData\LGMOBILEAX\Phone] Try to delete folder
15:41:27 : RemoveDirectory1 Error(2):C:\ProgramData\LGMOBILEAX\Phone
15:41:27 : ==================LJH log1 ====================
15:41:27 : !!*****OpenURL Start*****!!
15:41:28 : CreateFile : C:\ProgramData\LGMOBILEAX\Phone\D40520A_00.kdz
15:41:28 : =============HEADER : Range:bytes=0-=====================
15:41:28 : !!*****OpenURL Start*****!!
15:41:28 : *****DownLoad Start***** (Size:1170880830)
15:47:47 : Receive OK 1170880830/1170880830
15:47:47 : =============TAIL : 1170880830=====================
15:47:47 : Receive Size (1170880830/1170880830)
15:47:47 : *****CheckWebDownError Start*****
15:47:47 : File Error check OK
15:47:51 : ******Extract Start C:\ProgramData\LGMOBILEAX\Phone\D40520A_00.kdz*****
15:47:51 : Model Dll Dir(C:\ProgramData\LGMOBILEAX\Phone\)
15:47:51 : Check 2G-4G big size kdz file..
15:47:52 : Extract 2G-4G big size kdz file..
15:47:52 : NNNNN WDB FullPath(C:\ProgramData\LGMOBILEAX\Phone\D40520A_00.kdz)
15:47:52 : NNNNN Model dll FullPath(C:\ProgramData\LGMOBILEAX\Phone\LGUP_8x10_8x26.dll)
15:47:52 : Extract End C:\ProgramData\LGMOBILEAX\Phone\D40520A_00.kdz
15:47:52 : 01 Skip delete kdz 1.1 file...
15:47:52 : ------------------Model.dll Information-------------------
15:47:52 : Filename : LGUP_8x10_8x26.dll
15:47:52 : Version : 0.2.45.0
15:47:52 : File size : 1595904
15:47:52 : File date : 2015/06/10-15:47:52
15:47:52 : PC Created date: 2015/06/10-15:47:52
15:47:52 : ----------------------------------------------------------
15:47:52 : Skip delete kdz 1.1 or later version file...
15:47:55 : *****Check LGCM Programs Start*****
15:47:55 : LGCM Programs Not Found - OK and ready to upgrade
15:47:55 : m_pLGCyonUpdate status change.
15:47:55 : *****WorkModelDLL Start*****
15:47:56 : strPhoneBinaryPath(C:\ProgramData\LGMOBILEAX\Phone\D40520A_00.kdz)
15:47:56 : strModuleDir(C:\ProgramData\LGMOBILEAX\Phone\)
15:47:56 : strModelDLLPath(C:\ProgramData\LGMOBILEAX\Phone\LGUP_8x10_8x26.dll)
15:47:56 : _DetachDLL Call
15:48:01 : _DetachDLL Call End
15:48:01 : Call fn_StartUpgrade
15:48:01 : ********* 2Chip Model.dll input Parameter*************
15:48:01 : MODEL_EVENT : 32769
15:48:01 : PhoneBinaryPath : C:\ProgramData\LGMOBILEAX\Phone\D40520A_00.kdz
15:48:01 : ModuleDir : C:\ProgramData\LGMOBILEAX\Phone\
15:48:01 : BootWaitTime : 49500
15:48:01 : UsbHighSpeed : FALSE
15:48:01 : PhoneMode : 2
15:48:01 : NewPhoneBinVersion : D40520A_00
15:48:01 : ClearSI : FALSE
15:48:01 : AuthMark : 0
15:48:01 : ********* 2Chip Model.dll input Parameter End*************
15:48:05 : wParam : 20, lParam = 540
15:48:05 : MODEL DLL Event : (20, 540)
15:48:07 : Model File Count = 540
15:48:07 : wParam : 100, lParam = 51
15:48:07 : MODEL DLL Event : (100, 51)
15:48:07 : Step : TYPE_WPARAM_UPGRADE_ERROR
15:48:07 : CleanModelDll() : Free Model.dll
15:48:07 : _DetachDLL Call
15:48:12 : _DetachDLL Call End
15:48:15 : Page_Error ºÎºÐÀÔ´Ï´Ù
15:48:15 : ¿©±â´Â Retry ºÎºÐÀÔ´Ï´Ù