MacBook Pro turns itself on when power adapter connected

I have noticed the identical behavior. I am new to Apple and am basically unfamiliar with the "sleep" function because in the PC world using "sleep" is very unreliable and asking for trouble. I have become complacent with the MacBook Pro and enjoyed the convenience of not having to reboot and reload basic software every time I want to turn the computer off/on. Nevertheless, this sort of "anomaly" is disconcerting. Is there a list of basic "sleep" rules or do's and dont's available anywhere?

Thanks to anyone in advance.

Bill

KatanaBook i have found a solution to our problem:

Resetting your Mac's PRAM and NVRAM

* Last Modified: May 13, 2008
* Article: HT1379

* Old Article: 2238

Summary

This document explains how to reset the parameter random access memory (PRAM) and nonvolatile RAM (NVRAM) on Macintosh computers.

Important: If your computer does not retain parameter RAM (PRAM) settings when it is turned off, this generally indicates that the battery needs to be changed. Refer to Macintosh Family: Batteries and Part Numbers.
Products Affected

Portable Computers, Desktop Computers
Resetting PRAM and NVRAM

1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

Your computer's PRAM and the NVRAM are reset to the default values. The clock settings may be reset to a default date on some models.

http://support.apple.com/kb/HT1379

KatanaBook i have found a solution to our problem:

Resetting your Mac's PRAM and NVRAM

* Last Modified: May 13, 2008
* Article: HT1379

* Old Article: 2238

Summary

This document explains how to reset the parameter random access memory (PRAM) and nonvolatile RAM (NVRAM) on Macintosh computers.

Important: If your computer does not retain parameter RAM (PRAM) settings when it is turned off, this generally indicates that the battery needs to be changed. Refer to Macintosh Family: Batteries and Part Numbers.
Products Affected

Portable Computers, Desktop Computers
Resetting PRAM and NVRAM

1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

Your computer's PRAM and the NVRAM are reset to the default values. The clock settings may be reset to a default date on some models.

http://support.apple.com/kb/HT1379

Had the same problem for a long time (late 2006 MBP) as no available solutions worked and Apple tech support/Genius Bar was no help. Happened to get a new AC adapter yesterday for travel and the problem went away when using it.

Hope this helps.

i have the same problem also, my system is:

MacBook Pro 15" 2.4Ghz C2D 2GB Ram
Leopard 10.5.1

I have set a schedule for my MBP to shut down at 3am every morning.
Most of the time the notebook is not powered to begin with, and when i plug in the power adapter, it turns itself on.

I had assumed this had something to do with my schedule...

Do any of you experiencing this issue also have any schedules set?

I have noticed in System Overview in the Power section it shows:

"Power on self-test passed"
then it would show the date it turned itself on after plugging in the charger.

This happens every time i plug the charger in.

Any help would be greatly appreciated.

Do you have restart automatically after a power failure set in Energy Saver Preference, options?

My Macbook Pro does the same thing. It turns itself on when connected to an AC outlet. I will shut it down, only to return later and find it in the sleep mode. Any ideas?

sorry for double post...

Message was edited by: marty.mcfly