Before working on the inside of a computer, you need to ground yourself. If you have ever walked across a carpeted floor, and touch the doorknob. You will remember seeing a spark, for a human no big deal. Do this to a computer and it is like a lightning bolt hitting the motherboard. So, to be safe we want to use a electrostatic discharge strap. Any computer repair shop should have these for around $10.00. It goes around your wrist, there is an alligator clip attached. Clip the alligator clip to a metal part of the computer. For laptop use a a USB port.