Firstly remember that PS3 is affected by the heat. So you ought to be aware that this happens to many consoles, and it will especially cause the PlayStation 3 to freeze at some point? The same issue can happen to a computer actually; heat will either make it freeze or shut down entirely.After you’ve verified the connections switch off the unit manually via the onboard switch in the back, disengage all cables, and then remove the hard drive.You ought to make sure after 10 minutes, reattach the cables, hit the switch, and see if this solves your problem. Learn more here: fix ps3 blinking light ?