820-2850 no sleep


New member

Lid closes but does not sleep.

Can someone telme where is the sleep sensor on these and where does it plug into the board.
Is SMC_LID the right signal to check?


located on the Battery indicator light, it has Magnetic read switch in the ribbon cable.
Most likely just the light


Staff member
SMC_LID is it.

This is old enough that it could have had a screen replacement already, so put a magnet by the battery indicator. If it dims the screen, then someone popped the magnet out and didn't put it back while replacing the screen.

If that doesn't do it, check SMC_LID on the board when you put the magnet there. If it lowers, then it's a board issue, if it does not lower, then it is a battery indicator/sleep sensor issue.