I took a video of booting up here on a screen failure. It appears to have shifted the top 1/3 of the screen or so to the bottom, the top 2/3s are permanent glitch, and the bottom 1/3, even when it gets to the log in icons in OSX, still reverts back to the apple symbol seen during boot. It sort of jumps back and forth between current and old image. I'm hoping to diagnose from this if it's a screen failure, logic board failure, video ram failure, loose cable, etc. so I can price out my self repair options and decide what to do. I have looked at many photos and stories of screen failures and solves, but I have not managed to locate any failure that looks like this one. I can't find anything similar. I know it isn't the OS because the problem exists even before the OS has booted. I have cleared parameter RAM. The laptop has been on the shelf for about a month - I put it away working, but it came out like this. No drops or impacts, it was in a case. Banging on/twisting the laptop does not change the display in any way, so I don't think it's as simple as a loose or grungy connection. https://www.youtube.com/watch?v=K84-NjVBCec Any ideas are appreciated on what part of the system could cause something like this.