My DELL Optiplex 3040 play weird LOUD noise then suddenly shutdown and when i turn it on the power button keep blinking

So, I was watching some vid then the computer suddenly shutdown the screen when its shutdown it like you unplug the TV (there no shutdown screen)and play weird noise, i think it was a bluescreen of death so i dont think too much and i see there no bluescreen, when i turn it on again the power button keep blinking Can anyone help me?