Macbook was dead, and was resurrected though this fix!
My macbook pro was saying that my hard drive was missing.. So I took it to the apple store, & they told me i had to replace my hard drive (for some ridiculous amount), I ended up doing it myself.. but it still didn't work. After searching around, I figured it must be the hard drive cable so I decided to give it a shot.
The repair was relatively easy, using the spudger was super helpful (I have a dent on the side of my macbook & the hard drive wouldn't have come out if the spudger wasn't there). The guide was super helpful (but i did freak out because there was no guide how to put things back together). After the installation, I had a problem with trying to find the hard drive again (turns out you have to format it properly), anyways the installation went perfectly & now I'm using it like it was brand new! :)
Keep an eye on the screws, maybe put them in separate containers & be careful not to strip your screws. And try to remember what goes where (the pictures in the guide help). Other than that, I suppose have some fun!