[G3 Q&A, Help & Troubleshooting] adikinzor:
in this morning i tried to go back to stock lollipop from CloudyG3 2.2 after seeing you can actually root stock now and tried the kdz method posted somewhere here. unfortunately the software (LG Flash tool crashed <<i hit the roof when i saw this software was unstable>> in the middle of the process and my phone is now bricked cant access anything not even download mode). nevertheless i saw there are some methods to reset the motherboard(i believe?1??!?!) MSM8974AC especially Smart Boot Diag tool but somehow it doesnt work for me . in the log.txt i have this >> [ I dont know if it helps]

It's not the first time i brick it but i've managed to unbrick it several times but now i think there's no hope.

---------------------------- Start Logging ----------------------------

>> USB Status : Qualcomm HS-USB QDLoader 9008 (COM8)

>> Ready to access the target board...

>> BootLoader File : All EU Global_XXXX_XXXX.mbn

>> 1. Model : All EU Global , 2. Suffix : XXXX , 3. Operator : XXXX

>> Bootloader : All EU Global_XXXX_XXXX.mbn

>> AP Chip : MSM8974_G3 , BootLoader : All EU Global_XXXX_XXXX.mbn

>> Trying Connection To Device with sahara protocol for AP Chip.

>> Successfully Connection To Device with sahara protocol for AP Chip.

>> connected with Sahara Protocol successfully.

>> Loading flash to SYS_IMEM.

>> Loading 0 Kbytes to SYS_IMEM.

>> Loading 4 Kbytes to SYS_IMEM.

>> Loading 8 Kbytes to SYS_IMEM.

>> Loading 12 Kbytes to SYS_IMEM.

>> Loading 16 Kbytes to SYS_IMEM.

>> Loading 20 Kbytes to SYS_IMEM.

>> Loading 24 Kbytes to SYS_IMEM.

>> Loading 28 Kbytes to SYS_IMEM.

>> Loading 32 Kbytes to SYS_IMEM.

>> Loading 36 Kbytes to SYS_IMEM.

>> Loading 40 Kbytes to SYS_IMEM.

>> Loading 44 Kbytes to SYS_IMEM.

>> Loading 45 Kbytes to SYS_IMEM.

>> Successfully Loaded to SYS_IMEM.(Total 45 Kbytes)

>> Flash Image was normally loaded to SYS_IMEM.

>> Checking for device status.

>> [Verifying Hello Protocol]

>> Sending Hello request 0 time(s).

>> SendSync EHOST_HELLO_RSP OK.

>> Hello Response OK.

>> Got Hello response for Hello request.

>> [Verifying Security Protocol]

>> Security Response OK.

>> Connected to flash bootloader.

1> ----------------------------------------------------------------------

>> PBL SOFTWARE HISTORY

1> ----------------------------------------------------------------------

>> 1.Smart Boot Diagnosis Tool v1.3.1 <Analysis Tool for Booting failure>

>> 2.PBL_VERSION_NUMBER [fc021834] = 1c6c6162

1> ----------------------------------------------------------------------

1> ----------------------------------------------------------------------

>> SECURE_BOOT_INFORMATION

1> ----------------------------------------------------------------------

>> [QFPROM - AP Anti-rollback Region of OEM Region ]

>> QFPROM_AP_ANTIROLLBACK_1 [0xFC4B80B8] = 0x00000000

>> QFPROM_AP_ANTIROLLBACK_2 [0xFC4B80BC] = 0x00000000

>> QFPROM_AP_ANTIROLLBACK_3 [0xFC4B80C0] = 0x00000000

>> QFPROM_AP_ANTIROLLBACK_4 [0xFC4B80C4] = 0x00000000

1> ----------------------------------------------------------------------

>> QFPROM_DEVICE_SN_1 [0xFC4B81F0] = 0x0C42B2CB

>> QFPROM_DEVICE_SN_2 [0xFC4B81F4] = 0x8800000B

1> ----------------------------------------------------------------------

>> QFPROM_MSA_ANTIROLLBACK_1 [0xFC4B80C8] = 0x00000000

>> QFPROM_MSA_ANTIROLLBACK_2 [0xFC4B80CC] = 0x00000000

1> ----------------------------------------------------------------------

>> [QFPROM QFuse INFO]

>> QFPROM_OEM_ID_LSB [0xFC4B80F0] = 0x00310000

>> QFPROM_OEM_ID_MSB [0xFC4B80F4] = 0x00000000

>> QFPROM_SECURE_BOOT_ENABLE_LSB [0xFC4B83F8] = 0x00202020

>> QFPROM_SECURE_BOOT_ENABLE_MSB [0xFC4B83FC] = 0x00000000

>> QFPROM_JTAG_DISABLE_LSB [0xFC4B80E8] = 0x3FC000C0

>> QFPROM_JTAG_DISABLE_MSB [0xFC4B80EC] = 0x040001FE

1> ----------------------------------------------------------------------

>> JTAG_ID [0xFC4BE0E0] = 0x107B40E1

>> OEM_ID [0xFC4BE0E4] = 0x00310000

>> SERIAL_NUM_MSB [0xFC4B81F4] = 0x8800000B

>> SERIAL_NUM_LSB [0xFC4B81F0] = 0x0C42B2CB

>> [SECURITY INFO]

>> OEM_CONFIG_ROW0_LSB_ADDR [0xFC4B80E8] = 0x3FC000C0

>> OEM_CONFIG_ROW0_MSB_ADDR [0xFC4B80EC] = 0x040001FE

>> OEM_CONFIG_ROW1_LSB_ADDR [0xFC4B80F0] = 0x00310000

>> OEM_CONFIG_ROW1_MSB_ADDR [0xFC4B80F4] = 0x00000000

>> FEAT_CONFIG_ROW0_LSB_ADDR [0xFC4B80F8] = 0x00B08010

>> FEAT_CONFIG_ROW0_MSB_ADDR [0xFC4B80FC] = 0x00000000

>> FEAT_CONFIG_ROW1_LSB_ADDR [0xFC4B8100] = 0x00000001

>> FEAT_CONFIG_ROW1_MSB_ADDR [0xFC4B8104] = 0x0004785F

1> ----------------------------------------------------------------------

>> Start Address : 0xfc102140

>> End Address : 0xfc102c80

1> ----------------------------------------------------------------------

>> PBL_APPS LOG

1> ----------------------------------------------------------------------

>> PBL_LOG_COUNT=12

>> LOG_CODE :: 0xef010800 [ DECODED : 0x00010800 ]

>> TIMESTAMP :: 0x0002bcfb

>> LOG_CODE :: 0xef0f0203 [ DECODED : 0x000f0203 ]

>> TIMESTAMP :: 0x0002c387

>> LOG_CODE :: 0xef010802 [ DECODED : 0x00010802 ]

>> TIMESTAMP :: 0x0002f8eb

>> LOG_CODE :: 0xef010804 [ DECODED : 0x00010804 ]

>> TIMESTAMP :: 0x00030f34

>> LOG_CODE :: 0xef010806 [ DECODED : 0x00010806 ]

>> TIMESTAMP :: 0x00031286

>> LOG_CODE :: 0xef010808 [ DECODED : 0x00010808 ]

>> TIMESTAMP :: 0x0003132f

>> LOG_CODE :: 0xef01080a [ DECODED : 0x0001080a ]

>> TIMESTAMP :: 0x000313df

>> LOG_CODE :: 0xef01080c [ DECODED : 0x0001080c ]

>> TIMESTAMP :: 0x00031423

>> LOG_CODE :: 0xef5d0201 [ DECODED : 0x005d0201 ]

>> TIMESTAMP :: 0x0003150f

>> LOG_CODE :: 0xef0f0600 [ DECODED : 0x000f0600 ]

>> TIMESTAMP :: 0x0005dc58

>> LOG_CODE :: 0xef0f0500 [ DECODED : 0x000f0500 ]

>> TIMESTAMP :: 0x08d833d0

>> LOG_CODE :: 0xefa00502 [ DECODED : 0x00a00502 ]

>> TIMESTAMP :: 0x08daeffd

1> ----------------------------------------------------------------------

>> < PBL DUMP LOG >

1> ----------------------------------------------------------------------

>> 1> PBL_GENERAL_LOG_FUNC_EXEC

1> PBL_FUSE_LOG_DEFAULT

1> PBL_GENERAL_LOG_DEFAULT

1> PBL_GENERAL_LOG_DEFAULT

1> PBL_GENERAL_LOG_DEFAULT

1> PBL_GENERAL_LOG_DEFAULT

1> PBL_GENERAL_LOG_DEFAULT

1> PBL_GENERAL_LOG_DEFAULT

1> PBL_SDC_LOG_DEFAULT

1> PBL_FUSE_USB_ENUM_TIMEOUT

1> PBL_FUSE_AP_SW_REV

1> PBL_AUTHENTICATION_LOG_DEFAULT

>> Logged Time : 2015-04-03 18:37:38...successfully Completed.

>> Saved Log File(LOG_All EU Global_XXXX_XXXX_20150403_183738.txt) successfully.

Can anyone help me or give me some suggestions please? ( i dont want to send it to lg service at the moment because i think warranty is void and even if they repair it it would take 1-2 months ) i'll send it however if i have no other choice.