[Android Q&A, Help & Troubleshooting] toxinburn:
Let me sorta run this by everyone again, I took the phone with battery in, plugged into usb to pc....phone would boot just to lg logo then go to black screen with led lights flashing....I then removed the battery while still plugged in....shorted the two middle battery pins a few times just with some random wires, i then tried rebooting the phone with the battery out by holding power down for awhile until i got the no battery symbol on screen, replaced the battery and tried to shell to it successfully, wish i knew exactly how i got that lucky but i dont have a clue as to how I did.....also I had the what i thought to be destroyed fuel laying on a desk with the battery out for two weeks so it could have more to do with that than anything else......but if you have linux and stock partition images saved then I would say for you to open up a sudo shell window and type the following commands.,,,as I have done this multiple times to replace my aboot and abootb partitions which cause similar errors as the bootloops you think your having....I have recovered once where i got the lg logo and the led lights then black screen and also earlier I really thought it was toast I didnt even get to logo screen or lights just vibrate once then nothing yet i recovered it again in the following manner.....

first off the way to get the list of your partitions is to type gdisk -l /dev/sdf

toxinburn-XPS-8700 toxinburn # gdisk -l /dev/sdf
GPT fdisk (gdisk) version 0.8.8

Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sdf: 7634944 sectors, 3.6 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 98101B32-BBE2-4BF2-A06E-2BB33D000C20
Partition table holds up to 36 entries
First usable sector is 34, last usable sector is 7634910
Partitions will be aligned on 1024-sector boundaries
Total free space is 40926 sectors (20.0 MiB)

Number Start (sector) End (sector) Size Code Name
1 8192 139263 64.0 MiB 0700 modem
2 139264 141311 1024.0 KiB FFFF sbl1
3 141312 142335 512.0 KiB FFFF rpm
4 142336 143359 512.0 KiB FFFF tz
5 143360 144383 512.0 KiB FFFF sdi
6 144384 148479 2.0 MiB FFFF aboot
7 148480 149503 512.0 KiB FFFF rpmb
8 149504 150527 512.0 KiB FFFF tzb
9 150528 154623 2.0 MiB FFFF abootb
10 154624 158719 2.0 MiB 0700 pad
11 158720 164863 3.0 MiB FFFF modemst1
12 164864 171007 3.0 MiB FFFF modemst2
13 171008 203775 16.0 MiB FFFF misc
14 204800 270335 32.0 MiB 0700 persist
15 270336 315391 22.0 MiB FFFF laf
16 319488 364543 22.0 MiB FFFF boot
17 364544 409599 22.0 MiB FFFF recovery
18 409600 415743 3.0 MiB FFFF fsg
19 417792 418815 512.0 KiB FFFF fsc
20 418816 419839 512.0 KiB FFFF ssd
21 425984 427007 512.0 KiB FFFF DDR
22 434176 435199 512.0 KiB FFFF encrypt
23 435200 436223 512.0 KiB FFFF rct
24 442368 458751 8.0 MiB 0700 drm
25 458752 475135 8.0 MiB 0700 sns
26 475136 516095 20.0 MiB FFFF factory
27 516096 581631 32.0 MiB FFFF fota
28 581632 583679 1024.0 KiB FFFF sbl1b
29 583680 649215 32.0 MiB 0700 mpt
30 649216 650239 512.0 KiB FFFF eksst
31 650240 666623 8.0 MiB 0700 eri
32 671744 3178495 1.2 GiB 0700 system
33 3178496 3792895 300.0 MiB 0700 cache
34 3792896 7551999 1.8 GiB 0700 userdata
35 7553024 7634910 40.0 MiB 0700 grow

you get this list above pay attention to the numbers on far left you need these to replace whatever partitions you screwed up, in most cases ive seen here i would think replacing the sdf32 partition is what you need to do, which is the system, to do this you need to open a root shell from the folder that you have your backed up partition images in. so you would type dd if=system.img<---or whatever you have named it of=/dev/sdf32 and press enter then you will get something similar to what i got below here which is an example of where i replaced my aboot.

toxinburn-XPS-8700 ORIGINAL FUEL PARTITIONS # dd if=aboot.img of=/dev/sdf6
4096+0 records in
4096+0 records out
2097152 bytes (2.1 MB) copied, 0.510277 s, 4.1 MB/s

Hope this helps, also I found an interesting post regarding some hex editing of some other lg phones aboot and abootb partitions, that may be useful or help us to getting into these. http://xdaforums.com/g2-mini/development/bootloader-unlock-t2827748 check that out and it relatively new post, so i would assume that we could do something similar to end this madness of a locked bootloader on a freaking 30 dollar phone lol.....I tried to find the strings listed in our aboot but did not find it however i found some pretty close what we need to find out is exactly what offset they used and maybe we could be a bit closer, since i have been able to replace my aboot and abootb if anyone finds out let me know and i will try it, i have tried to replicate it no luck yet.