No such thing! Scream Sony. Down to you roundeye muppets sticking them in stupid places! Well, true up to a point. No 2 son complaining that his PS3 was freezing up after an hour or so. Did seem a bit warm. So, answer is to turn it off from the switch at the back and then turn it on whilst holding the Eject button down. Beeps and goes into "Fan Test" mode where it sounds ready for lift off. All manner of dusty crud blown out. Did that twice and no probs. since.