Everyone has had plenty of experiences dealing with electrostatic discharge—reaching out a hand to open the car door on a dry winter day and hesitating, because you know that zap is coming. Annoying isn’t it? Unfortunately, ESD can be a lot more harmful than that. Without proper prevention, it could damage a computer to the point of no return. The zap you felt when you opened the door was at least 2,500 volts of ESD, caused by the transfer of electrons from one surface (the door handle) to another (your hand). Charges as weak as 200 volts can severely damage your computer, and since they are below the threshold of human feeling, you might have no idea it’s happening.
Catastrophic failure, damage to your computer that cannot be undone, is commonly due to ESD, and it can be direct or latent. Direct isn’t really a problem to anyone but manufacturers, since it is usually detected in initial testing. Latent catastrophic failure is what you should worry about. Low-voltage static charges may be slowly causing damage to your computer system, and may not show symptoms for weeks or even months. Then, suddenly, out of nowhere, you’ve got a computer that won’t turn on and can’t be fixed.
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