[General Questions and Answers] VaultTec96:
Hello, I was trying to flash stock ROM to my phone but I needed to get into Download Mode but it instead was booting into fastboot mode, so I had to erase and rewrite some partitions manually using fastboot. I ask it here because there's no LG L70 forum and may be it's a general issue which can occur in other super bricked phones.

I remember erasing laf, recovery and aboot partitions but while I was rewriting them, phone rebootet itself unexpectedly (probably a battery error) and now it doesn't boot at all. It doesn't show LG logo when booting (it only vibrates) and if I connect it to Windows or Linux PC, it keeps rebooting continously without anything being shown.

I'm following this guide, trying to manually unbrick it with dd'ing aboot.img to aboot partition but I cant because but it keeps disconnecting while these lines keeps on repeating in dmesg output.

[ +1.067652] usb 1-2: new high-speed USB device number 22 using xhci_hcd
[ +0.130690] usb 1-2: config 1 has an invalid interface number: 20 but max is 1
[ +0.000005] usb 1-2: config 1 has no interface number 1
[ +0.001269] usb-storage 1-2:1.20: USB Mass Storage device detected
[ +0.000721] scsi host4: usb-storage 1-2:1.20
[ +1.519495] usb 1-2: USB disconnect, device number 22

Also after disconnecting and reconnecting it, some purple screen with DBI Error pops up on screen and screen closes (it starts showing this screen with one second interval) and this lines starts to keep repeating in dmesg output:

[ +0.405246] usb 1-2: new high-speed USB device number 29 using xhci_hcd
[ +0.137032] usb 1-2: config 1 has an invalid interface number: 20 but max is 1
[ +0.000002] usb 1-2: config 1 has no interface number 1
[ +0.001309] usb-storage 1-2:1.20: USB Mass Storage device detected
[ +0.000107] scsi host4: usb-storage 1-2:1.20
[ +1.022123] scsi 4:0:0:0: Direct-Access Qualcomm MMC Storage 1.00 PQ: 0 ANSI: 2
[ +0.000762] sd 4:0:0:0: Attached scsi generic sg2 type 0
[ +0.000208] sd 4:0:0:0: [sdb] 7634944 512-byte logical blocks: (3.91 GB/3.64 GiB)
[ +0.000187] sd 4:0:0:0: [sdb] Write Protect is off
[ +0.000005] sd 4:0:0:0: [sdb] Mode Sense: 0f 0e 00 00
[ +0.000176] sd 4:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ +0.007774] sdb: sdb1 sdb2 sdb3 sdb4 sdb5 sdb6 sdb7 sdb8 sdb9 sdb10 sdb11 sdb12 sdb13 sdb14 sdb15 sdb16 sdb17 sdb18 sdb19 sdb20 sdb21 sdb22 sdb23 sdb24 sdb25 sdb26 sdb27 sdb28 sdb29 sdb30 sdb31 sdb32 sdb33 sdb34 sdb35
[ +0.002044] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[ +0.761824] usb 1-2: USB disconnect, device number 29
[ +0.013062] sd 4:0:0:0: [sdb] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x01 driverbyte=0x00
[ +0.000005] sd 4:0:0:0: [sdb] tag#0 CDB: opcode=0x28 28 00 00 00 00 80 00 00 90 00
[ +0.000002] blk_update_request: I/O error, dev sdb, sector 128
[ +0.009148] sd 4:0:0:0: [sdb] Synchronizing SCSI cache
[ +0.000053] sd 4:0:0:0: [sdb] Synchronize Cache(10) failed: Result: hostbyte=0x01 driverbyte=0x00

It recognizes all the partitions in the device for a split second and it goes off and reboots again. I can get partition table and lsusb outputs Bus 001 Device 084: ID 1004:61a1 LG Electronics, Inc. also with gdisk if I time it correctly, it's like this:

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 655360 757759 50.0 MiB 8300 cust
31 761856 762879 512.0 KiB FFFF eksst
32 770048 3841023 1.5 GiB 0700 system
33 3841024 4353023 250.0 MiB 0700 cache
34 4353024 7564287 1.5 GiB 0700 userdata
35 7569408 7634910 32.0 MiB 0700 grow

So I think there's still hope, by the way if I plug in and out a few times, Linux starts recognizing it as a Qualcomm modem device and phone stops rebooting. If I reboot system to Windows, it shows as a Qualcomm 9008 device and there are 2 folders in it called image and verinfo. But sometimes Windows recognizes it LGE AndroidNet Device.

I don't know what to do after this point. I tried forcing dd after it sees /dev/sda6 file but it can't write all the image file (only 700~kb of it)(file is 1mb).

Is there any going back from this?

Kind regards.