I says it's the power and eject contact buttons. They work with induction. And can auto trigger or be blocked by certain light sources. I was fixing my friends PS3 fat. And his eject button wouldn't work when a disc was in the drive. And it would activate the console when pressed. Found out I bent the top where it wasn't making contact with the button right. It was triggering only half of the eject functions. And I had the system under a lamp. I move it away. It functions normally.