How Power Source Problems Affect A Computer

These problems that have been named here affect computers in different ways. Some of the improper conditions are described below.

A. Voltage Problems

1. The computer power supply and regulating circuits may be called upon to operate on the fringe of, or outside, the designed limits and be incapable of holding the internal voltages to within tolerable limits. The operating bias levels of the electronic circuits might be shifted.
2. Harmonic distortion may be produced in the computer's internal power supplies.
3. A power interruption generally causes the computer system to crash. This can be avoided only if an adequate uninterruptible power supply (UPS) system neutralizes the interruption of power.

1. These can affect the timing circuits of the computer, leading to illogical behavior.
2. The computer power supply can be rendered inoperative or aberrant, especially if it uses a resonant voltage-regulating transformer.

1. These can scramble or distort the digital coding being transferred to or from memory or storage.
2. Transients can reach into memory and change digital signals stored there.
3. Transients can halt the program or cause unwanted branching operations.
4. Transients, if large enough, can destroy some circuit components.

1. These can cause extraneous signals to appear on signal lines with all of the possibilities of disrupting the operations in much the same way as transients, cross-talk, and noise.
2. Improper grounds can permit abnormal voltages to appear on the computer surfaces, resulting in injury to personnel and/or circuits.

These produce spurious input data.