My computer has 2 Nvidia graphics cards, and I have Windows running on one SATA drive.

I added a second SATA drive, just plugged it in via the 2 cables. I attempted to install Ubuntu 16 on the second SATA drive. It came up on the screen just fine, installed on the drive, and asked me to reboot.

Upon reboot, I remove the USB stick and set the Ubuntu-installed SATA drive as the primary boot drive. After Bios, nothing happens. I only get a blank screen, and the computer does not even seem to be working on anything, no blinking lights or anything. It just seems to be frozen there. 

When I press the power button the computer shuts down instantly, no 10-second press or anything.

How can I get Ubuntu to work?
Thank you for your help.