Can laptops be stored on top of each other?

I have a few MacBooks. When putting my macbook pro on top of a old shut macbook it put my screen to sleep on the MacBook pro. I thought I had killed my laptop so I moved things around and when I started it came back to life. I moved it and it died again. It looks like when the lids are lined up the computers sleep.

Anyone else seen this?

actually the very likely [to be sure] point of shut off [as Tuttle jogged my memory here at 1230am] is the magnetic REED SWITCH in the bottom chassis of your Pro, it is being tripped by the magnet in the LID of the bottom macbook Pro

see the indicator as show at bottom left and up one of the reed switch which magnetically induces sleep mode [or the macbook Pro thinks the lid is closed when it is not]

Either way the advice is the same, ...dont use a macbook as a coaster for another macbook

a reed switch is a sealed glass tube having ferrous contacts inside it..

these reed strips are stiff such that in the absence/presence of a magnet nearby it opens/closes thereby breaking/completing the circuitry

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