Oh yeah, sorry for not mentioning that. View: https://imgur.com/a/lnB2Y3aUse your manual to determine which light is blinking please.
In case you lost it : https://www.asus.com/Motherboards-Components/Motherboards/PRIME/PRIME-H370-PLUS/HelpDesk_Manual/
Oooh alright, thanks for informing me about it. The last time i asked why my mobo was blinking, I got ghosted...That's the accent lighting, it will flash when your PC is asleep.
Windows 8 & above don't actually turn off when you tell it to shutdown. Instead they enter a hybrid sleep.