I own a 15 inch macbook pro pre-unibody, purchased in 2007. Recently, my computer has been getting MUCH slower. The the sound started to give out. Like when i'm listening to music, you can still hear the sound, it just breaks up and is VERY crackly (10% music, 90% crackle). Then my screen started to go black when active. I've kind of found out that if you move the lcd, it goes black. All my warranty is expired, and I don't have much cash. Am I up a creek without a paddle? What's wrong with this thing? How do i fix it? I still have plenty of memory left, If you need more info to help me out, just let me know. - Thank you so much for reading.