[SOLVED] Optiplex 3020 MT won't boot after changing BIOS from Legacy to UEFI ?

[MrDreamerz]

After following these steps on this video (

View: https://www.youtube.com/watch?v=AqbilFvRdrE
) my pc will no longer boot, it turns on and is running but nothing at all comes up on the screen. If someone can help it will be much appreciated thanks.
" i already tried resetting the MB by removing the battery still no dice "

UPDATE!!
i got it up by using the vga port in my motherboard with a old monitor i had and i put it back to legacy and it's all fixed

But i'm still curious of how to put it in UEFI successfully??

 

[william p]

If your video card requires Lagacy to run then you'll get nothing in UEFI. That's probably why the onboard GPU is working.