The first thing that you could consider is that your PS3 is being affected by the heat. This occurs to many consoles, and it will especially render the PlayStation 3 to freeze at some point. Did you see that heat can affect your computer also building it freeze or shut down entirely?After you’ve verified the connections switch off the unit manually via the onboard switch in the backside, cut off all cables, and then remove the hard drive.Try and see after 10 minutes  reattach the cables, hit the switch, and see if this solves your problem. Learn more here: fix ps3 blinking ?