[Q] [LG L7] II P710 stuck in weird bootloop

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Mar 24, 2014
23
7
Phone : Android 4.1.2 JellyBean LG L7 II P710

After trying to flash my bootloader with Flash_bootloader.bat from a folder called L7CWM, thinking it would work since the original poster said it worked for all L7 Devices, my phone wouldn't turn on, the LG logo appears, goes off, reapears and so on...

So I downloaded KDZ, tried to install V10K , with the first V10K, I set the phone type to 3GQCT, phone mode to both DIAG and EMERGENY, didn't work, both time errors, when I saw WPARAM 100 and LPARAM 1002, I instinctevly googled it, and there was a guy who said that downloading "his" version of V10K helped him, so I did... what happened? After using KDZ on DIAG mode with the new V10K, here's the log
[R&D Test Tools Log File]

06:30:48 : Launching SW update
06:30:48 : Unpacking KDZ
06:30:51 : KDZ file extraced
06:30:52 : Files were extracted.
06:30:52 : LGMobileDL Load.
06:30:52 : Port = -1
06:30:52 : Connecting to phone
06:31:06 : Check Phone mode = 2
06:31:06 : Phone type check.......
06:31:08 : LGMobileDL.DLL Loading....
06:31:08 : _SetAuthMark Fail
06:31:08 : _SetAuthMark Ok : wAuthMark(65535)
06:31:08 : _DetachDLL Call
06:31:08 : _DetachDLL Call End
06:31:08 : Param : Path = C:\ProgramData\LGMOBILEAX\Phone\LGP700AT-ROOT-CWM-NewBoot-00-V10k-EUR-XX-FEB-22-2013+0.dz
06:31:08 : Param : moduleDir =
06:31:08 : Param : waitTime = 1
06:31:08 : Param : UsbHighSpeed = 1
06:31:08 : Param : PhoneMode = 2
06:31:08 : Param : BinVersion = v10k
06:31:08 : Param : AuthMark = 65535
06:31:08 : Call fn_StartUpgrade
06:31:08 : 3GQCT : wParam = 206, lParam = 0
06:31:29 : 3GQCT : wParam = 20, lParam = 0
06:31:29 : 3GQCT : wParam = 205, lParam = 0
06:31:29 : 3GQCT : wParam = 205, lParam = 1
06:31:29 : 3GQCT : wParam = 205, lParam = 2
06:31:30 : 3GQCT : wParam = 205, lParam = 3
06:31:30 : 3GQCT : wParam = 205, lParam = 4
06:31:30 : 3GQCT : wParam = 205, lParam = 5
06:31:30 : 3GQCT : wParam = 205, lParam = 6
06:31:30 : 3GQCT : wParam = 205, lParam = 7
06:31:30 : 3GQCT : wParam = 205, lParam = 8
06:31:30 : 3GQCT : wParam = 205, lParam = 9
06:31:30 : 3GQCT : wParam = 205, lParam = 10
06:31:30 : 3GQCT : wParam = 205, lParam = 11
06:31:30 : 3GQCT : wParam = 205, lParam = 12
06:31:31 : 3GQCT : wParam = 205, lParam = 13
06:31:31 : 3GQCT : wParam = 205, lParam = 14
06:31:31 : 3GQCT : wParam = 205, lParam = 15
06:31:31 : 3GQCT : wParam = 205, lParam = 16
06:31:31 : 3GQCT : wParam = 205, lParam = 17
06:31:31 : 3GQCT : wParam = 205, lParam = 18
06:31:31 : 3GQCT : wParam = 205, lParam = 19
06:31:31 : 3GQCT : wParam = 205, lParam = 20
06:31:32 : 3GQCT : wParam = 205, lParam = 21
06:31:32 : 3GQCT : wParam = 205, lParam = 22
06:31:32 : 3GQCT : wParam = 205, lParam = 23
06:31:32 : 3GQCT : wParam = 205, lParam = 24
06:31:32 : 3GQCT : wParam = 205, lParam = 25
06:31:32 : 3GQCT : wParam = 205, lParam = 26
06:31:32 : 3GQCT : wParam = 205, lParam = 27
06:31:32 : 3GQCT : wParam = 205, lParam = 28
06:31:32 : 3GQCT : wParam = 205, lParam = 29
06:31:32 : 3GQCT : wParam = 205, lParam = 30
06:31:32 : 3GQCT : wParam = 205, lParam = 31
06:31:32 : 3GQCT : wParam = 205, lParam = 32
06:31:32 : 3GQCT : wParam = 205, lParam = 33
06:31:33 : 3GQCT : wParam = 205, lParam = 34
06:31:33 : 3GQCT : wParam = 205, lParam = 35
06:31:33 : 3GQCT : wParam = 205, lParam = 36
06:31:33 : 3GQCT : wParam = 205, lParam = 37
06:31:33 : 3GQCT : wParam = 205, lParam = 38
06:31:33 : 3GQCT : wParam = 205, lParam = 39
06:31:33 : 3GQCT : wParam = 205, lParam = 40
06:31:33 : 3GQCT : wParam = 205, lParam = 41
06:31:33 : 3GQCT : wParam = 205, lParam = 42
06:31:33 : 3GQCT : wParam = 205, lParam = 43
06:31:33 : 3GQCT : wParam = 205, lParam = 44
06:31:33 : 3GQCT : wParam = 205, lParam = 45
06:31:33 : 3GQCT : wParam = 205, lParam = 46
06:31:34 : 3GQCT : wParam = 205, lParam = 47
06:31:34 : 3GQCT : wParam = 205, lParam = 48
06:31:34 : 3GQCT : wParam = 205, lParam = 49
06:31:34 : 3GQCT : wParam = 205, lParam = 50
06:31:34 : 3GQCT : wParam = 205, lParam = 51
06:31:34 : 3GQCT : wParam = 205, lParam = 52
06:31:34 : 3GQCT : wParam = 205, lParam = 53
06:31:34 : 3GQCT : wParam = 205, lParam = 54
06:31:34 : 3GQCT : wParam = 205, lParam = 55
06:31:34 : 3GQCT : wParam = 205, lParam = 56
06:31:34 : 3GQCT : wParam = 205, lParam = 57
06:31:34 : 3GQCT : wParam = 205, lParam = 58
06:31:35 : 3GQCT : wParam = 205, lParam = 59
06:31:35 : 3GQCT : wParam = 205, lParam = 60
06:31:35 : 3GQCT : wParam = 205, lParam = 61
06:31:35 : 3GQCT : wParam = 205, lParam = 62
06:31:35 : 3GQCT : wParam = 205, lParam = 63
06:31:35 : 3GQCT : wParam = 205, lParam = 64
06:31:35 : 3GQCT : wParam = 205, lParam = 65
06:31:35 : 3GQCT : wParam = 205, lParam = 66
06:31:35 : 3GQCT : wParam = 205, lParam = 67
06:31:35 : 3GQCT : wParam = 205, lParam = 68
06:31:35 : 3GQCT : wParam = 205, lParam = 69
06:31:35 : 3GQCT : wParam = 205, lParam = 70
06:31:35 : 3GQCT : wParam = 205, lParam = 71
06:31:36 : 3GQCT : wParam = 205, lParam = 72
06:31:36 : 3GQCT : wParam = 205, lParam = 73
06:31:36 : 3GQCT : wParam = 205, lParam = 74
06:31:36 : 3GQCT : wParam = 205, lParam = 75
06:31:36 : 3GQCT : wParam = 205, lParam = 76
06:31:36 : 3GQCT : wParam = 205, lParam = 77
06:31:36 : 3GQCT : wParam = 205, lParam = 78
06:31:36 : 3GQCT : wParam = 205, lParam = 79
06:31:36 : 3GQCT : wParam = 205, lParam = 80
06:31:37 : 3GQCT : wParam = 205, lParam = 81
06:31:37 : 3GQCT : wParam = 205, lParam = 82
06:31:37 : 3GQCT : wParam = 205, lParam = 83
06:31:37 : 3GQCT : wParam = 205, lParam = 84
06:31:37 : 3GQCT : wParam = 205, lParam = 85
06:31:37 : 3GQCT : wParam = 205, lParam = 86
06:31:37 : 3GQCT : wParam = 205, lParam = 87
06:31:38 : 3GQCT : wParam = 205, lParam = 88
06:31:38 : 3GQCT : wParam = 205, lParam = 89
06:31:38 : 3GQCT : wParam = 205, lParam = 90
06:31:38 : 3GQCT : wParam = 205, lParam = 91
06:31:38 : 3GQCT : wParam = 205, lParam = 92
06:31:38 : 3GQCT : wParam = 205, lParam = 93
06:31:38 : 3GQCT : wParam = 205, lParam = 94
06:31:38 : 3GQCT : wParam = 205, lParam = 95
06:31:38 : 3GQCT : wParam = 205, lParam = 96
06:31:38 : 3GQCT : wParam = 205, lParam = 97
06:31:38 : 3GQCT : wParam = 205, lParam = 98
06:31:39 : 3GQCT : wParam = 205, lParam = 99
06:31:39 : 3GQCT : wParam = 205, lParam = 100
06:31:39 : 3GQCT : wParam = 21, lParam = 0
06:31:39 : 3GQCT : wParam = 205, lParam = 101
06:31:39 : 3GQCT : wParam = 205, lParam = 102
06:31:39 : 3GQCT : wParam = 205, lParam = 103
06:31:39 : 3GQCT : wParam = 205, lParam = 104
06:31:39 : 3GQCT : wParam = 15, lParam = 0
06:31:39 : 3GQCT : wParam = 205, lParam = 0
06:31:39 : 3GQCT : wParam = 205, lParam = 1
06:31:39 : 3GQCT : wParam = 205, lParam = 2
06:31:40 : 3GQCT : wParam = 205, lParam = 3
06:31:40 : 3GQCT : wParam = 205, lParam = 4
06:31:40 : 3GQCT : wParam = 205, lParam = 5
06:31:40 : 3GQCT : wParam = 205, lParam = 6
06:31:40 : 3GQCT : wParam = 205, lParam = 7
06:31:41 : 3GQCT : wParam = 205, lParam = 8
06:31:41 : 3GQCT : wParam = 205, lParam = 9
06:31:41 : 3GQCT : wParam = 205, lParam = 10
06:31:41 : 3GQCT : wParam = 205, lParam = 11
06:31:41 : 3GQCT : wParam = 205, lParam = 12
06:31:41 : 3GQCT : wParam = 205, lParam = 13
06:31:42 : 3GQCT : wParam = 205, lParam = 14
06:31:42 : 3GQCT : wParam = 205, lParam = 15
06:31:42 : 3GQCT : wParam = 205, lParam = 16
06:31:43 : 3GQCT : wParam = 205, lParam = 17
06:31:43 : 3GQCT : wParam = 205, lParam = 18
06:31:43 : 3GQCT : wParam = 205, lParam = 19
06:31:43 : 3GQCT : wParam = 205, lParam = 20
06:31:43 : 3GQCT : wParam = 205, lParam = 21
06:31:43 : 3GQCT : wParam = 205, lParam = 22
06:31:43 : 3GQCT : wParam = 205, lParam = 23
06:31:44 : 3GQCT : wParam = 205, lParam = 24
06:31:44 : 3GQCT : wParam = 205, lParam = 25
06:31:44 : 3GQCT : wParam = 205, lParam = 26
06:31:45 : 3GQCT : wParam = 205, lParam = 27
06:31:45 : 3GQCT : wParam = 205, lParam = 28
06:31:45 : 3GQCT : wParam = 205, lParam = 29
06:31:46 : 3GQCT : wParam = 205, lParam = 30
06:31:46 : 3GQCT : wParam = 205, lParam = 31
06:31:47 : 3GQCT : wParam = 205, lParam = 32
06:31:47 : 3GQCT : wParam = 205, lParam = 33
06:31:47 : 3GQCT : wParam = 205, lParam = 34
06:31:48 : 3GQCT : wParam = 205, lParam = 35
06:31:49 : 3GQCT : wParam = 205, lParam = 36
06:31:51 : 3GQCT : wParam = 205, lParam = 37
06:31:51 : 3GQCT : wParam = 205, lParam = 38
06:31:51 : 3GQCT : wParam = 205, lParam = 39
06:31:51 : 3GQCT : wParam = 205, lParam = 40
06:31:52 : 3GQCT : wParam = 205, lParam = 41
06:31:52 : 3GQCT : wParam = 205, lParam = 42
06:31:52 : 3GQCT : wParam = 205, lParam = 43
06:31:52 : 3GQCT : wParam = 205, lParam = 44
06:31:52 : 3GQCT : wParam = 205, lParam = 45
06:31:52 : 3GQCT : wParam = 205, lParam = 46
06:31:52 : 3GQCT : wParam = 205, lParam = 47
06:31:52 : 3GQCT : wParam = 205, lParam = 48
06:31:52 : 3GQCT : wParam = 205, lParam = 49
06:31:52 : 3GQCT : wParam = 17, lParam = 0
06:31:52 : 3GQCT : wParam = 205, lParam = 0
06:31:58 : 3GQCT : wParam = 205, lParam = 1
06:31:59 : 3GQCT : wParam = 205, lParam = 2
06:32:05 : 3GQCT : wParam = 205, lParam = 3
06:32:06 : 3GQCT : wParam = 205, lParam = 4
06:32:09 : 3GQCT : wParam = 205, lParam = 5
06:32:13 : 3GQCT : wParam = 205, lParam = 6
06:32:14 : 3GQCT : wParam = 205, lParam = 7
06:32:19 : 3GQCT : wParam = 205, lParam = 8
06:32:23 : 3GQCT : wParam = 205, lParam = 9
06:32:25 : 3GQCT : wParam = 205, lParam = 10
06:32:30 : 3GQCT : wParam = 205, lParam = 11
06:32:31 : 3GQCT : wParam = 205, lParam = 12
06:32:38 : 3GQCT : wParam = 205, lParam = 13
06:32:39 : 3GQCT : wParam = 205, lParam = 14
06:32:43 : 3GQCT : wParam = 205, lParam = 15
06:32:48 : 3GQCT : wParam = 205, lParam = 16
06:32:51 : 3GQCT : wParam = 205, lParam = 17
06:32:54 : 3GQCT : wParam = 205, lParam = 18
06:32:59 : 3GQCT : wParam = 205, lParam = 19
06:33:01 : 3GQCT : wParam = 205, lParam = 20
06:33:03 : 3GQCT : wParam = 205, lParam = 21
06:33:04 : 3GQCT : wParam = 205, lParam = 22
06:33:06 : 3GQCT : wParam = 205, lParam = 23
06:33:08 : 3GQCT : wParam = 205, lParam = 24
06:33:10 : 3GQCT : wParam = 205, lParam = 25
06:33:13 : 3GQCT : wParam = 205, lParam = 26
06:33:14 : 3GQCT : wParam = 205, lParam = 27
06:33:16 : 3GQCT : wParam = 205, lParam = 28
06:33:17 : 3GQCT : wParam = 205, lParam = 29
06:33:20 : 3GQCT : wParam = 205, lParam = 30
06:33:22 : 3GQCT : wParam = 205, lParam = 31
06:33:26 : 3GQCT : wParam = 205, lParam = 32
06:33:29 : 3GQCT : wParam = 205, lParam = 33
06:33:31 : 3GQCT : wParam = 205, lParam = 34
06:33:32 : 3GQCT : wParam = 205, lParam = 35
06:33:34 : 3GQCT : wParam = 205, lParam = 36
06:33:36 : 3GQCT : wParam = 205, lParam = 37
06:33:38 : 3GQCT : wParam = 205, lParam = 38
06:33:39 : 3GQCT : wParam = 205, lParam = 39
06:33:41 : 3GQCT : wParam = 205, lParam = 40
06:33:42 : 3GQCT : wParam = 205, lParam = 41
06:33:45 : 3GQCT : wParam = 205, lParam = 42
06:33:46 : 3GQCT : wParam = 205, lParam = 43
06:33:47 : 3GQCT : wParam = 205, lParam = 44
06:33:49 : 3GQCT : wParam = 205, lParam = 45
06:33:51 : 3GQCT : wParam = 205, lParam = 46
06:33:53 : 3GQCT : wParam = 205, lParam = 47
06:33:54 : 3GQCT : wParam = 205, lParam = 48
06:33:56 : 3GQCT : wParam = 205, lParam = 49
06:33:57 : 3GQCT : wParam = 205, lParam = 50
06:34:00 : 3GQCT : wParam = 205, lParam = 51
06:34:01 : 3GQCT : wParam = 205, lParam = 52
06:34:03 : 3GQCT : wParam = 205, lParam = 53
06:34:04 : 3GQCT : wParam = 205, lParam = 54
06:34:06 : 3GQCT : wParam = 205, lParam = 55
06:34:07 : 3GQCT : wParam = 205, lParam = 56
06:34:09 : 3GQCT : wParam = 205, lParam = 57
06:34:10 : 3GQCT : wParam = 205, lParam = 58
06:34:13 : 3GQCT : wParam = 205, lParam = 59
06:34:14 : 3GQCT : wParam = 205, lParam = 60
06:34:16 : 3GQCT : wParam = 205, lParam = 61
06:34:17 : 3GQCT : wParam = 205, lParam = 62
06:34:19 : 3GQCT : wParam = 205, lParam = 63
06:34:21 : 3GQCT : wParam = 205, lParam = 64
06:34:22 : 3GQCT : wParam = 205, lParam = 65
06:34:24 : 3GQCT : wParam = 205, lParam = 66
06:34:25 : 3GQCT : wParam = 205, lParam = 67
06:34:27 : 3GQCT : wParam = 205, lParam = 68
06:34:28 : 3GQCT : wParam = 205, lParam = 69
06:34:30 : 3GQCT : wParam = 205, lParam = 70
06:34:32 : 3GQCT : wParam = 205, lParam = 71
06:34:34 : 3GQCT : wParam = 205, lParam = 72
06:34:35 : 3GQCT : wParam = 205, lParam = 73
06:34:37 : 3GQCT : wParam = 205, lParam = 74
06:34:38 : 3GQCT : wParam = 205, lParam = 75
06:34:40 : 3GQCT : wParam = 205, lParam = 76
06:34:41 : 3GQCT : wParam = 205, lParam = 77
06:34:44 : 3GQCT : wParam = 205, lParam = 78
06:34:45 : 3GQCT : wParam = 205, lParam = 79
06:34:47 : 3GQCT : wParam = 205, lParam = 80
06:34:48 : 3GQCT : wParam = 205, lParam = 81
06:34:51 : 3GQCT : wParam = 205, lParam = 82
06:34:52 : 3GQCT : wParam = 205, lParam = 83
06:34:54 : 3GQCT : wParam = 205, lParam = 84
06:34:55 : 3GQCT : wParam = 205, lParam = 85
06:34:57 : 3GQCT : wParam = 205, lParam = 86
06:34:58 : 3GQCT : wParam = 205, lParam = 87
06:35:01 : 3GQCT : wParam = 205, lParam = 88
06:35:02 : 3GQCT : wParam = 205, lParam = 89
06:35:03 : 3GQCT : wParam = 205, lParam = 90
06:35:05 : 3GQCT : wParam = 205, lParam = 91
06:35:06 : 3GQCT : wParam = 205, lParam = 92
06:35:08 : 3GQCT : wParam = 205, lParam = 93
06:35:09 : 3GQCT : wParam = 205, lParam = 94
06:35:12 : 3GQCT : wParam = 205, lParam = 95
06:35:13 : 3GQCT : wParam = 205, lParam = 96
06:35:15 : 3GQCT : wParam = 205, lParam = 97
06:35:16 : 3GQCT : wParam = 205, lParam = 98
06:35:18 : 3GQCT : wParam = 205, lParam = 99
06:35:19 : 3GQCT : wParam = 205, lParam = 100
06:35:19 : 3GQCT : wParam = 22, lParam = 0
06:35:27 : 3GQCT : wParam = 205, lParam = 101
06:35:29 : 3GQCT : wParam = 18, lParam = 0
06:35:34 : 3GQCT : wParam = 205, lParam = 102
06:35:37 : 3GQCT : wParam = 23, lParam = 0
06:35:37 : 3GQCT : wParam = 11, lParam = 0
And in the end, WPARAM 100 LPARAM 1002 Error.

Now my phone won't enter emergency mode or even boot normally, both times while trying to boot or trying to enter emergency causes a black screen with horizontal white lines, then a complete black screen , then another set of white lines... Similar to a bootloop just, with some scary white lines...

*EDIT* : My PC won't even recognize my phone while in recovery or regular boot mode anymore!

Any help possible or is my phone dead forever?
 
Last edited:

西村大一

Senior Member
Dec 7, 2012
857
342
Sagamihara\Tōkyō
Mar 24, 2014
23
7
Alexander and Super Skill, my phone won't enter emergency mode ( Battery out, Vol - then USB in ) There are those annoying black lines again and my PC doesn't even register my phone on any port!
 
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Reactions: Djole-97
Mar 24, 2014
23
7
Update : Tried entering download mode (Vol UP + Power button, then Home button immediately after vibrating) , at first I got like 10-20 blue lines, then they started to expand and I got an almost full blue screen filled with expanded horizontal blue lines, and some pinkish/redish very expanded vertical "lines", they didn't look like lines, they looked like some kind of shading... then after a few minutes, the edges of my screen started to black out, and now my screen is like a black frame with blue in the middle...
Is this my motherboard dying? Is it possible to **** up the motherboard via flashing the bootloader ( because my phone stopped working right after I did that ) ?
 
  • Like
Reactions: Djole-97

西村大一

Senior Member
Dec 7, 2012
857
342
Sagamihara\Tōkyō
Update : Tried entering download mode (Vol UP + Power button, then Home button immediately after vibrating) , at first I got like 10-20 blue lines, then they started to expand and I got an almost full blue screen filled with expanded horizontal blue lines, and some pinkish/redish very expanded vertical "lines", they didn't look like lines, they looked like some kind of shading... then after a few minutes, the edges of my screen started to black out, and now my screen is like a black frame with blue in the middle...
Is this my motherboard dying? Is it possible to **** up the motherboard via flashing the bootloader ( because my phone stopped working right after I did that ) ?

sure, what you just did is "brick" the phone. the bootloader is the thing that controlls the booting process and the vital stuff. your symptoms are the sign of a partial-brick, because you can still turn on the phone. I recommend you taking the phone to a service where thaey have a JTAG machine so they can flash back the bootloader and then the stock rom. Most times, the stock rom comes with a bootloader but in this case, it is the wrong bootloader, so, your only choice is to take the phone to a service shop with a JTAG device and have it repaired.
 
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Reactions: Dragoljub Milosevic
Mar 24, 2014
23
7
sure, what you just did is "brick" the phone. the bootloader is the thing that controlls the booting process and the vital stuff. your symptoms are the sign of a partial-brick, because you can still turn on the phone. I recommend you taking the phone to a service where thaey have a JTAG machine so they can flash back the bootloader and then the stock rom. Most times, the stock rom comes with a bootloader but in this case, it is the wrong bootloader, so, your only choice is to take the phone to a service shop with a JTAG device and have it repaired.

Will try this and post an update soon! Thanks for helping!
 
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Reactions: Djole-97

norelec

Member
Dec 7, 2013
33
3
lg l7

sure, what you just did is "brick" the phone. the bootloader is the thing that controlls the booting process and the vital stuff. your symptoms are the sign of a partial-brick, because you can still turn on the phone. I recommend you taking the phone to a service where thaey have a JTAG machine so they can flash back the bootloader and then the stock rom. Most times, the stock rom comes with a bootloader but in this case, it is the wrong bootloader, so, your only choice is to take the phone to a service shop with a JTAG device and have it repaired.


Can we make custom rom for lg l7II?
 

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