I think he means clearing the PRAM, forgot the order or which keys to press so had it look it up on Apple's website. Hope this helps!
MacBook, MacBook Pro
1. If the computer is on, turn it off.
2. Disconnect the AC Adapter and remove the computer's battery.
3. Press and hold down the power button for 5 seconds and then release the button.
4. Reconnect the battery and AC Adapter.
5. Press the Power button to restart the computer.