hello there, always checked macrumors's forum whenever I had mac problems but I had searched for this this problem like crazy and could not find a solution. I have a late 2008 unibody aluminum macbook ( Model ID - 5,1 ) I had my motherboard (logicboard) and hard drive replaced because of a fan malfunction ( fan was also replaced ) in 2009. I recently replaced the ram from the stock 2gb to OWC 8 GB no problem The issue that I am having is that my screen has been going bonkers unless i put pressure on the back casing and the front screen (which im doing now) I took a screenshot capture to see if the crazy screen was also on the computer, as i read other forums and said try this to see if its the screen or the gpu? I have horizontal lines that disfigure whatever image is on the screen, and sometime my screen slowly turns into black?! I've posted pictures to hopefully give a better description as mine isn't very good. the first picture is the screenshot of my desktop, the last 3 are pictures off my cell phone of what im viewing. any ideas?