Step by Step How to Diagnose and Replace a Failed PC Power Supply (part-2)

• If you suspect that your power supply is dying, replace it. A common clue which indicates a failing power supply is a high-pitched whining or grinding noise from the area of the case where the power supply is housed. Don’t wait until the supply dies, because its failure can cause voltage problems which can ruin your motherboard, hard drive, or other components.

• Invest in a high quality power supply. Do some research before you purchase one. More wattage on the package doesn’t mean better. Most home PCs don’t actually use more than 300W even though this is not what power supply marketing people want you to know. The unit should provide adequate wattage for your needs. Don’t skimp on the power supply, as you may regret it later. Power supplies that fail can damage other components in your computer, especially the motherboard.

• If you’ve gone through multiple power supplies in a short period of time you MAY have a faulty outlet. This is exacerbated by cheap power supplies as they are not hardy pieces of equipment.