Blank Screen after Enabling Secure Boot in the BIOS
Mick's IT Blog
MAY 7, 2018
I then moved up to a Dell Optiplex 9010, and it included secure boot. The monitor was blank. This did not reset the BIOS, and the screen was still blank. It must be turned off for the secure boot to be enabled. It was this option that actually caused the screen to be blank when using the video card.
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