Ok, so I have a 2009 Macbook Pro 2.4 Ghz Intel Core 2 Duo ( I bought it new in 2010) Lately, when I boot up, towards the bottom, it looks like there are waves-or rather, areas that aren't illuminated . (I tried taking a screen shot, but the waves don't show up for some reason.) it usually goes away after a couple of hours of the computer being on or in sleep mode, but it seems to be happening more frequently. I fear that something is going on that will get worse until one day it won't work at all. any ideas?