AFAIK I selected correct version (A10, firmware 20U). But why doesn't the phone show any signs of life? Even if I plug in the charger, the phone doesn't show charging even though it was displaying charging normally before.
Is it possible that this is a hardware error (e.g. flash memory?)
But I have also a few question about your backup (backup_lg-v50s.rar):
First of all, are .bin files the same as .img files and could they be interchangeable?
Then please take a look to the following scenario:
I replace in your backup LUN5 partitions (fsc.bin, fsg.bin, modemst1.bin, modemst2.bin) by my saved copies. Then I restore this backup. This should unbrick the phone.
Am I right, and most importantly, is there any way to restore this backup without booting into normal mode?