I cant enter the new Firmware update

[JohnRoy2]

My device got stuck on a boot loop. I was trying to unbrick it by using the LG flash tool which I got from the https://www.lgflash.com/. I am sure the tool has no any bugs or like that sort of thins. But I need to enter the firmware update mode fast. I already tried to turn my device on by connecting it to my pc and pressing Vol + button. Please help!!

 

[belodion]

Are you saying that you did not use the official software tool from the LG site? I used it recently for a firmware upgrade, with not the slightest problem.