Apologies for the incoming wall of text.
I recently installed Ubuntu 13.10 on my computer which used to run windows 8.1 until it stopped working because of drivers or something.
Ubuntu installed fine and I was using it for a couple of days with no problems. Well, I shouldn't say no problems, my data hard drive (1TB secondary drive) was unable to mount on Ubuntu and couldn't be reformatted. When I tried to format the drive, I got an error saying something along the lines of the drive being unable to be mounted.
When I reset my computer after reformatting the drive, my bios flash screen no longer showed up and I was taken directly to the Ubuntu login screen. I then tried to use boot-repair based on the guide at https://help.ubuntu.com/community/Boot-Repair
I restarted my computer right after that and nothing ever showed up. I waited 5 minutes and nothing happened, so I turned off the computer and turned it back on to the same black screen.
Nothing is showing up when I turn on the computer. No bios, no login screen, nothing.