I'm repairing a friend's macbook (A1342) and it has the exact same problem - the display goes glitchy and slowly fads to white, works if you pinch the upper-left corner, used to be occasional but now it's constant. Since where you pinch is no where near the LVDS cable I figure it can't be that, as other people have said it's not. I'm going to try replacing just the LCD (if they decide to spring for it), I'll report back to this thread when I do.