Originally Posted by r i c h
Yes, just by inserting the battery the phone vibrates and begins to start up.
Once the Samsung logo appears it turns back off again.
Indicates Samsung stuck power button syndrome. A lot has been posted about this.
I would start with warranty service if available.
If not, search a lot & choose solutions carefully.
It happened once with my Captivate & teardown & blowout cured it,
though I never observed the physical defect (only the symptoms).
I have used apps to reduce my use of the button ever since, with GS2 & GS3.
Approach teardown with extreme caution if you are not experienced.
Gently tapping a table edge with the upper right has worked for some.