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Current version by: Philip ,

Title:

Computer turns self on, never shutting off?

Text:

Hot on the tail of my LCD fix: http://www.ifixit.com/Answers/View/137205/Why+does+my+LCD+screen+wash+out+without+a+torque+applied

I've got a new issue to grapple with--I can push the power button to turn on my Macbook, but when I put it to sleep it will turn itself back on, and when I set it to shut down it will power and boot right back up on its own.

To rule out the button/cable being bad, I disconnected the keyboard ribbon from the ZIF socket, confirmed that pressing any buttons would not turn on the computer (to verify that the keyboard was disconnected), and then powered it up by shorting the contacts on the logic board. The computer booted fine and I shut it down, only to be met with it booting itself again.

The final test was to dis-/re-connect the battery and short the contacts again to make the computer boot, and then to short the pads for five seconds to force a shutdown. Again, the computer started itself back up again.

I've cleared the NVRAM and PRAM, reseated every cable on the logic board, and did a nose test for burny bits.

Suggestions? Tips? This one's got me stumped...

Device:

MacBook Pro 13" Unibody Mid 2009

Status:

open

Accepted Answer:

137526

Original post by: Philip ,

Title:

Computer turns self on, never shutting off?

Text:

Hot on the tail of my LCD fix: http://www.ifixit.com/Answers/View/137205/Why+does+my+LCD+screen+wash+out+without+a+torque+applied

I've got a new issue to grapple with--I can push the power button to turn on my Macbook, but when I put it to sleep it will turn itself back on, and when I set it to shut down it will power and boot right back up on its own.

To rule out the button/cable being bad, I disconnected the keyboard ribbon from the ZIF socket, confirmed that pressing any buttons would not turn on the computer (to verify that the keyboard was disconnected), and then powered it up by shorting the contacts on the logic board. The computer booted fine and I shut it down, only to be met with it booting itself again.

The final test was to dis-/re-connect the battery and short the contacts again to make the computer boot, and then to short the pads for five seconds to force a shutdown. Again, the computer started itself back up again.

I've cleared the NVRAM and PRAM, reseated every cable on the logic board, and did a nose test for burny bits.

Suggestions? Tips? This one's got me stumped...

Device:

MacBook Pro 13" Unibody Mid 2009

Status:

open