A few weeks ago, my Macbook Air's screen turned into a flickering mess of vertical lines, whited-out areas and fragmented pieces of the icons on my desktop. I brought it to my local Apple-licensed repair guy, who initially told me he would replace the video card. Unfortunately, my computer was briefly partially submerged in bathwater about a year ago and, according to him, there is visible water damage inside the computer, which voids my AppleCare and turns this into a 1000-dollar repair, including a replaced logic board. Presently, my computer works just fine outside of the screen. I'm using it in clamshell mode as a desktop and I have no problems. Could the logic board really be damaged in a very specific way that affects the screen but not the displayport (and nothing else about the computer)? And more importantly, is there any way I can fix this myself for significantly less than 1000 bucks, or should I just use my computer as a desktop from now on?