Help troubleshooting Ubuntu installation?

I need serious help with this.. I now only have Ubuntu on my computer, as I was confident it would boot without problems if it was the only OS on my system. However, it simply does not boot. It loads the grub menu, and when I select to load Ubuntu, one of the following happens:

-Leads to a black screen with a blinking cursor.
-Leads to the ubuntu background without the logo, just that purple background with no further actions.
-Leads to a black background.

I have tried-

-extending root delay by adding rootdelay=90 after pressing `e` at the grub menu.
-placing root=/dev/sda1 in the same location as above.
-adding/replacing other stuff in the same location as above, according to solutions on the internet, but to no avail.

Calling all experts, whether google expert searchers or linux experts. I have googled to the best of my ability on a solution to this problem.