Chosen Solution
Hot on the tail of my LCD fix: 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…
Did you ever remove or disconnect the Airport card during the LCD repair? My memory is a bit foggy on this but this sounds like a symptom we used to see when the cable inserted into the Airport card upside down. Immediately after shutting the Mac down it would power back on. One side of the cable’s connection should have two small grounding tabs (like two small C’s cut out), if these are visible and facing outward then this is likely the cause. Unfortunately I seem to recall irreversible damage being done to the logic board if this situation arose.
