A few weeks ago, my laptop developed what looked like a brown stain in the top left corner of the screen. I tried cleaning it, and discovered that the 'stain' was on the inside. Over the last few weeks, this 'stain' has grown and now surrounds nearly my entire screen. From what I've read it's not dead pixels, because they go black right? Can anyone tell me what it might be, and if there's a way to fix it? I have tried to attach a photo but I'm not familiar with these forums so I'm not sure if it's going to work..