Before You Open Your Computer...
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There are two things you should know about the inside of your computer.
- The computer is not dangerous. You do not have to be an electrician to work inside one; many people perform
computer upgrades themselves at home. The only component with any significant amount of voltage is the power supply,
and that has its own metal casing so you can't get inside it anyway. The parts of the system you see run at 5V and 12V
DC, which is no more potent than a transistor radio.
- You are dangerous. You know that little blue spark that zaps from
your finger to the doorknob after walking across the carpet? It carries THOUSANDS of volts! You know about the
static that makes your clothes cling if you forgot to use fabric softener? That static is worth HUNDREDS of
volts! Remember, most of the computer's circuitry is designed to handle only 5 volts. If you let static get into the
computer, you could blow lots of tiny fuses and cause "mega" damage. Therefore, always remember to:
- Plug the computer's power cord into a grounded outlet (not a two-prong outlet)
- Make sure the computer is turned off; if you are using a power strip, turn that off too
- Keep your skin (not your clothes) in contact with a metal part of the computer's frame, or wear a grounding
strap if you have one