Compaq Presario CQ50 notebook screen goes fuzzy when opened to a certain angle (about 90 degrees). Wires being pinched at the hinges? If so how do I go about repairing this?

It sounds like you've damaged the cable that goes from your graphincs card to your screen or when you move it to 90degrees it's disconnecting. it's usually caused by someone opening the laptop and not putting the cable back in the right place, or loose screws in your hinges or a broke hinge. there are plently of videos showing how to open it up. follow one of them and make sure your wires are sitting in the right place, you don't have loose screws and the hinges aren't broken.