Why won't my screen turn on?

I shut my computer the other day, and when I opened it back up the next afternoon, the screen was black. The first time, I followed this guide (http://osxdaily.com/2014/11/22/fix-macbo...) and when I got to the part of resetting the PRAM, that seemed to fix it as the grey screen finally appeared.

The second time it happened about a week later, I followed the same guide and the PRAM reset did not work. After multiple attempts at the different steps, my boyfriend tried the SMC reset and that worked, the grey screen appeared again. I made sure to shut my computer off when I was done with it that time, and when I started it again, it seemed alright.

The next day though (yesterday), it did it again. I tried the guide above and nothing seemed to work, and eventually it just randomly appeared when I turned it on.

It happened for the fourth time last night as I was going to shut down my computer for the night. I think I accidentally hit restart because my computer screen went black and the indicator light at the front of the computer went off and came back on. I tried the different resets again, and nothing seemed to work. At one point, it did start to make the start up chime sound, repeatedly, after which I shut it back down.

Woke up this morning and tried to turn it on again, and got a blue screen.

I have also tried the flashlight test, and I do not see anything through the screen. Hitting the caps lock key does not turn the key indicator light on either.

Any help with this would be much appreciated.