Electrostatic discharge (ESD) is a fancy term for common static electricity. Getting a shock from the doorknob may not hurt you much, but the same kind of shock can put your computer in intensive care. Whenever you open the case to work on your PC's innards, you should be aware of ESD and how to avoid it.
Please follow the steps below:
1. It is a good idea to buy an anti-static wristband, and follow the instructions for use.(They are sold at most electronics stores.) If you are going to do quite a lot of bench work, you might do well to invest in an anti-static mat
2. If you don't have a wristband, you are not necessarily out of luck. Assuming that your PC is grounded, you can ground yourself by just keeping one hand in contact with the bare metal frame (not a painted or coated surface) of the computer case. Keep the PC power cord plugged in to a (3-prong) grounded outlet and turn off the rocker switch on the back of the power supply. If the power supply does not have a switch on the back, this won't work, however. Never work on a PC with the power on. In that case, you should buy an anti-static band or try another method of grounding
3. As an alternative, alter a standard 3-conductor power cord by snipping off the two flat blades, leaving only the grounding portion of the plug. Or simply purchase a cord like this from an electronics supply house. This accomplishes the same thing as turning off the rocker switch.
4. You can employ an LCD Static Discharger. As a simple measure, you can hang it on your key ring and just dangle it. This is less reliable, but when it touches a ground, it should discharge the static electricity. Procedure：①Lightly touch the oval button with a finger. ②Make sure that the end of the conductive material touches a grounded conductor. (such as vehicle, human body, computer, metal or other) to release static electricity, and observe the LCD display.
Here is some tips:
a. The average person can carry up to 25,000 volts of static energy at any given time. This sounds like a lot, but because the current level is low, you usually won't notice it. Just because you touched the dog's nose and he didn't yelp, it doesn't mean you are safe from ESD. Follow safe ESD procedures any time you open a computer.
b. If the equipment is cold, wait until it has reached room temperature. ESD builds up much faster when it's cold and dry (low humidity).
