Missing Hall sensor mystery.
My MacBook Pro (A1989) should have two hall sensors on most extreme position of motherboard. I found out, that my MacBook has only one. The other sensor pins has just connected two connection positions (middle two facing towards display). From time to time, it happens, that when I close the lid, Mac falls to hibernation, but does not wake up, when I close the lid. I am puzzled.
I was wondering, where to get second sensor, or how to make this more stable. I guess current state with shorted pins is but unusual.
Can you help?