erm, i don't have a ps3 but i had something like this happen with a ps2. what had happened was the laser had come loose inside the console, and the console would spend ages trying to realign the laser. if the ps3 is still in warranty then send it back. if it isn't still in warranty take it down to an electronics repair shop, you should be able to find one locally. but first make sure they've got experience with ps3's. when my ps2 broke i took it down to my local repair shop and they didn't have a clue what a ps2 was, not a good sign. so i fixed it myself. But, only try to do it youself if you have a fairly good idea what's wrong and how to fix it, and you're confident and competent around electronics and high voltage. there you go, its not my fault if you die.