Hi all- For the past few days, my screen has been going in and out of being entirely covered by 1px white lines that occasionally flicker blue or something. Like, when I'm typing (as I am now) if the window is positioned one pixel off, the blinking cursor won't appear (and on my black screensaver, it looks more like it's white/light grey because literally every other 1px line is white). Well, this morning it got weird again, but it hasn't gone back to normal! I have a Mid-2007 Santa Rosa Macbook Pro, 2.4 Ghz Core 2 Duo- LED Screen, backlight works fine and if I turn it completely down ('off') the problem persists. I have Boot Camp installed, and the problem persists when booting into Windows as well. I looked around and tried a few fixes to no avail (slept the screen, reset the PRAM, messed with the resolution a bit). I took a screenshot and everything shows up normal. I had to finish a paper I was working on, and the screen was getting unbearable, so I tried plugging it into a mate's external lcd and the image came up completely fine, no vertical lines! So, what could this be, and what could I do to fix it? Could this be the infamous problem with the Nvidia 8600GT M graphics card- so would I have to get the logic board repaired!? (UGH I hope not) Could it just be a connection issue? I did install a new hard drive, a new stick of memory, and Leopard, but that was months ago! Anything else I might be missing? Thanks, and I hope this problem isn't too serious! P.S.-on a side-note, has anybody done the upgrade to the latest firmware for the fans (SMC something)? Should I give that a try (or should I do it anyway, regardless of whether it could help)? When it was released, I heard of some bad experiences, so I stayed away.