hi,
first of all many thanks that there are people who put so much effort in maintaning 'old' phones.
I already rooted and flashed many devices, so for example I was many years proud owner of an lg g2, i still have an lg g pad 8.3... so I am quite familiar with twrp, the lg flash tool and in installing custom roms.
...but this time, following this threads instructions, I encountered a situation I never ever believed could happen:
I bought a used D855 16GB on the internet for sensational 30 euros, it came with MM 6.0 30D. Although I did exactly as said, kingroot just didn't want to work ... so I downgraded to 30b with the flash tool. Then kingroot worked, I got root, it felt like total victory was just minutes away and so I continued with installing autorec mm. The app was granted root access, I hit the big M after the backup was completed and waited for the magic. Unforuntately the screen went black just a few secs later and since then the phone is just entirely dead --> I cannot access Download Mode, I cannot get into recovery or not even just turn it on. Also when I plugin the charging cable it just stays dead, no lead blinking, no reaction at all. I did not just brick my phone, i quite executed it :angel:
I do not blame anyone for this, it was my decicison to try this.
And the financial los of this experiment of mine is also manageable.
However, I have no clue what the f*** hell did go wrong.
So I'm posting this for others. Mayby the developers can improve something, other simple useres like me might take this as a warning, this guide is no clean street