Initially you should confirm the consoles connections to the power outlet and TV. It’s wise to always plug your game into a surge protector to keep it safe. Remember that power rise can harm the PlayStation 3 and be the cause of this error in some cases.. Are you aware how to verify the connections switch off the unit manually via the onboard switch in the backside, separate all cables, and then remove the hard drive?Try after 10 minutes,  reattach the cables, hit the switch, and see if this solves your error. So now you know what occurs when ps3 beeps 3 times.. Click now: fix ps3 yellow light flashing