Can you run the monitor that is black off of the vga port?
I want to confirm the monitor is in ok working condition after the first couple minutes of use.
I had a really old lcd that would display the bios on screen but then appeared to go to sleep mode after the machine booted.
Turned out it did that on every computer it was connected to. The majick smoke came out during testing on other machines.
Main machine: Core I7 -2600K @ 4.0Ghz / 16 gig ram / Radeon RX 580 8gb / 500gb toshiba ssd / 5tb hd
Old machine: Core 2 quad Q6600 @ 3ghz / 8 gig ram / Radeon 7870 / 240 gb PNY ssd / 1tb HD