Nope. Just the cables that you use to connect to the wall to get electricity or you use to power up the PC. (Unplug PC from socket)
After it's unplugged, just push the ON switch a few times. Sometimes, there's still electricity inside the PSU.
He means you should unplug your power supply from the wall, and then press your computers' power button a couple times to make sure there's no harmful electricity still in the computer when you open it.
*EDIT* Oops, didn't see your second post there, Mr. Beans.
Hey, it's ok ! You gave a better explanation than I did.
Best answer selected by shell shocke.
Thanks for the info guys, I'll try this later today and see, as I can't do it because of the time lol.