IDENTIFY POWER REQUIREMENTS AND TROUBLESHOOT POWER PROBLEMS

Power issues are largely ignored by most computer users, but a properly working power supply Is the foundation to correct operation of the system.When the power supply stops working, the computer working, and when a power supply stops functioning properly- even slightly- all sorts of computer problems can take place. From unexpected system reboots to data corruption, from unrecognized bus powered USB devices to system overheating.

WORKING WITH POWER

Part of the role of the PC technician is to be aware of the environmental factors that might affect the functioning of a computer system. One of the more important environmental factors to be aware of is power. Several power conditions can cause problems. The most common of these include.

SAG

A drop in power supply that only lasts a short period, a sag is generally the most common type or power anomaly.

BROWNOUT

A drop in supply voltage that lasts more than a few seconds.

SPIKE

A sharp and very sudden increase in line voltage that pushes the suplly above an acceptable threshold.

SURGE

A sharp and very sudden increase in line voltage that pushes the supply voltage above an acceptable threshold.

NOISE

Noise is interference can cause the supply voltage to be incosnsistent.

BLACKOUT

A blackout is a complete failure in power supply. 

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