G464 Won't always boot after shutdown
I have a G464 (purchased in August 2020) that occasionally will not boot up after a shut down. The power light comes on but nothing happens. I will turn off the power switch on the back of the unit and it then am able to boot the system. I do not know if the line power is going out and then on, but that should not cause this issue. All drivers have been updated (that I can tell).

Comments
If that is what is occurring, try these steps below. Your G464 has a ASUS Tuf x570 plus motherboard.
Links:
Instruction Video For Bios Update
Bios file (Look under Bios)
https://www.asus.com/us/Motherboards/TUF-GAMING-X570-PLUS/HelpDesk_Download/