The following are methods of preventing computer hardware failure
- VENTILATION
All computers have ventilation holes, and fans that help them to cool down. Keeping fan openings and ventilation holes clear helps the airflow and keeps the device from overheating. Keeping the fans clean helps prevent dust and foreign matter from getting inside.
NB: Ensure that the computer is placed in an area with good ventilation such that the heat generated by the microprocessor, motherboard, and other devices is dissipated. In Paula Tapay and Kathryn MCFarland – 03 Jan 2007 addition, books and other objects should not be placed on top of the monitor case, as this would block excess heat from escaping from the ventilation slots. This could cause colour shifting, screen flicker, and failure. Follow these guidelines to ensure adequate ventilation: · Keep the computer upright and on a sturdy, level surface. · Provide at least 15.25 centimeters (6 inches) of clearance around each vent. · If the computer is being used at very high altitudes, above 1500 meters (5000 feet), take extra care to keep the computer cool. The maximum limit of 35 degrees Celsius (95 degrees Fahrenheit) drops 1 degree Celsius (~34 degrees Fahrenheit) every ~300 meters (1000 feet) of altitude. |
- CLEANING (REMOVE DUST AND LINT BY CLEANING VENTS)
Notebook PCs have vents located around the case to allow air to flow through the case. If these vents become clogged or heat generating parts become covered with dust, the fan cannot cool the components properly. Lint and dust accumulation prevents air from flowing around the cooling fins and causes the fan to work harder. If there is dust in the vents, you should clean the computer by blowing out the dust from around the fan and heat shield. This prevents dust from accumulating.
Figure: Dust accumulation
Dust accumulation around fan
CAUTION: Ensure that the computer is turned off and the AC adapter is disconnected before spraying with compressed air to prevent damage to the notebook PC.
Use a can of compressed air (a vacuum cleaner on blow function or a hair dryer in cool air mode can also be used, though the can of compressed air is better suited for this task) to remove dust from the computer’s vents and prevent overheating. Removing the dust increases the air flow to improve cooling and allows the fan to run quieter.
The cooling vents are located in various places depending on the PC model. You can identify the vents by looking for the copper or black fins inside the vents. You should also blow the compressed air into other openings such as the fan intake vent to help keep the air circulating and prevent dust from accumulating on components.
Figure: Side vent
Figure 4: Rear vent
By taking this action periodically as a preventive measure, you can greatly reduce the possibility of component damage and prevent the slowdown of the computer’s performance.
- UNINTERUPTED POWER SUPPLY (UPS)
A device which will protect your computer from electrical disturbances is available. It is called an uninterruptible power supply (UPS) system. Basically, a UPS unit contains electronic hardware and maintenance-free, sealed batteries to protect your computer and processed data.
During normal operation, the UPS unit acts as a filter: it removes noise and arrests any spikes which may occur on the electrical system. At the same time, the battery is being maintained by an electrical charge which keeps it at full capacity. When the UPS unit monitors a surge, a sag, or a momentary interruption of power, the battery comes online to provide the correct voltage to keep your computer operating.
During an extended power outage, the UPS unit will supply power to your computer and provide sufficient time for you to properly store your data and turn the computer equipment off. Usually, power back-up time is approximately ten minutes. Critical equipment, such as electronic phone systems or security systems, will stay on line longer when UPS systems with greater battery capacity are used.
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