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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 1010:  Safety and the Environment

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 V  Electrical Safety
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IV  Contamination

Even when you're wearing an anti-static strap, handle all components by the edges. Not only does this diminish the possibility of damaging component with ESD, it keeps body oils off of metal contact points.

[spacer]Erasing Contamination

If you think you have (or can actually see contamination) on an expansion card or SEC based CPU, wiping gently with a pencil eraser will clean the surface.


Before closing on the topic of contamination, we have one more consideration. Dust does a very poor job of transferring heat.

Contact Care

Think like Mr. Clean – Don’t touch contacts. Dust is your enemy for many reasons from data loss to improper cooling.


After ESD, heat is the next villain a PC must contend with. According to www.engineeringtalk.com, "Excessive temperature causes more failures than vibration, humidity and dust in industrial computer systems and accounts for 55% of all electronic equipment failure."

Given this data, vacuuming out a PC from time to time might seem like a good idea. Dust is such a pervasive enemy many certification exams test for knowledge on topics ranging from clean tape heads HVAC and server filters.

Keep it clean

Use a computer vacuum (these have long power cords) or compressed air on a regular basis to remove dust from inside the PC case. Try using a small brush to dust.


Of course dust isn't fussy, and will collect everywhere. Keyboards should get a regular dose of 'canned air' or gone over with a vacuum.

Dust Bunnies and Alcohol

Anti-static spray can be used to reduce dust attraction.

If the challenge is more grime and dirt than dust a small amount of denatured alcohol and a lint free cloth should be used for keyboards, mice, etc.



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