Question Cant boot uefi usbs anymore, instant flicker on screen when booting

Jan 11, 2021
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Hi there so i recently tried to load an .efi driver, it went all good until i wrote fs1: and LS then screen just froze. I thought it was normal so i turned off the pc. After that each time i flash any uefi usb screen just do an instant flicker and nothing happens still in bios.

Things i have tried:
Change usb port
Reset cmos / battery
reformat usb
trying diffirent usb sticks

Hopefully someone can help

Spec: z390-p asus
 
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