My wife's 17" MBP (last gen) has an odd graphics card issue that is intermittent: when the screen saver is on it disappears, then when the screensaver is disabled the screen has a strong purple hue, with color-shadows making it hard to use the screen. Now when one pushes on the palm rest the bug goes away and the screen becomes perfectly legible again. So it seems to be not necessarily a broken card, but a loose contact of some sort. We brought it to a local Mac repair shop that is usually less expensive than Apple itself, but they said they'd have to replace the graphics card (which I find hard to believe given the above description) and that would cost $700. Any clue if anything cheaper could be done? 3 year Apple Care is expired on the laptop.