Black screen of death

Currently, my boot sequence shows both SSD drives passing examination on boot. Then I get a black screen with a non blinking cursor in the upper left corner. The drive light shows no activity at that point. Waiting does nothing. If I attempt to boot from a thumb drive I can see the boot sequence on the screen, and then the black screen. It is almost as if the graphics loading fails.

Any insight, questions, solutions would be great.