Unibody White MacBook display dims when laptop on top of another

When you place an open display plastic unibody MacBook upon a closed display MacBook of almost any kind, the display will cut out when it goes past the ninety degree angle. I am thinking its a pressure point issue or a magnet issue. Though not entirely sure.

Its consistent enough to see it, but infrequent enough not to worry about it, since stacking laptops is a no-no, but occurs when doing mass imaging.

Has anyone else out there seen this strangeness?
What may be causing it?

Solution 1:

I've had this happen to me a few times, and it is annoying. My best guess is that the magnets in one MacBook are tricking the other one into thinking that the lid is closed. I know that it's at least possible to intentionally trigger the magnet that detects if the lid is closed, and my guess is that the other MacBook has a magnet in close proximity that's triggering it.

Solution 2:

Yes, I've had this happen; I thought the display was toast. Extremely faint (barely visible) image, not asleep, could occasionally get the image displayed to change. Read this post, picked up the laptop and … fine image. But I set it right down where it had been (yes, on top of another unibody MacBook) and the display stayed lit - repositioned slightly (it took a few tries) and replicated the problem.

Magnet idea is tempting, but I don't think it's the case as my machine didn't actually go to sleep - in fact I'd assume that closing the case would make the display black, not just extremely dim.