A Ghost In My PS3 - It Turns Itself On

Hmm.. sounds pretty odd to me. Are you sure nobody in your house is hitting the middle(Playstation) button on the controller to turn it on(accidentally or purposefully)?

I had a computer that used to do that when it was set to Sleep, but that was usually just because of a crappy mouse. You or somebody else might be hitting the PS button on your controller. And if that's not the case, then your PS3 might have a broken part or something.

Just don't do anything to annoy the ghost. Turning itself on is not a huge problem, when it starts turning itself off then you got a problem.

So did Sony remove the on/off switch in the rear of the slim consoles? I ALWAYS turn off the rear switch at the end of the day. There is no reason to leave it in standby eating up power, however small the usage is.

The slim doesn't have the switch.

I had a similar problem on XBox and on my PS3 (80GB original).
I had lent my PS3 to my mom because I have a little bro and sis that like movies and my mom's DVD player broke. So I was watching movies on my XBox. I would shut it off and wake up with it on. It turns out I was pressing the controller button in my sleep (I keep it on my bed). Pretty much same thing happening with my PS3 but Xbox has a bigger middle button.

quote Coi Cki

My old 60Gb did that, until I disabled remote play on it. My 40Gb hasn't done this.

The remote play option is probably causing your PS3 to power up. When you check the box to allow the PS3 to be powered on and off over the internet it warns that the machine could be powered up from time to time on it's own.