Hey all, My late 2008 MBP has been working great ever since I had it, but in the last few weeks its been running a bit sluggish. I originally decided to do a fresh install as hadn't done it for a good few years and this seemed to help, then last week I started having really slow boot up issue (5 mins) after booting into bootcamp and back to Mac OSX. Now the last 2 nights while using my Mac (either OSX or Bootcamp) I'll occasionally get a horizontal line flash across the screen. Only there for half a second or so and then gone, seems to be random, not affected by the angle of the screen so dont think its a hinge/cable problem. Any ideas what it might be? Thanks.