Hello. It's my first time posting here. I have a problem with ine of my RAMs in my laptop. my Laptop is an LG - F5 series with Core2Duo 1.6GHz, 2.5GB Ram (1x2GB + 1x 512GB). Recent;y I bought another RAM (2GB) but for some reason it's not recognized. Actually if I put it on, all I get is a black screen.... Any suggestions/help will do Thanks!