This article discusses common failures of desktop computer power supplies, their main symptoms, and methods for diagnosing the problem.
Desktop Computer Power Supply Failures: Symptoms and Diagnosis
The Power Supply Unit (PSU) is one of the most crucial components in a desktop computer, providing electrical power to all other system elements. PSU failures can lead to various problems, ranging from unstable operation to complete computer malfunction. Timely identification of symptoms and correct diagnosis will help determine the cause of the problem and take the necessary measures.
Main Symptoms of Power Supply Failures
- The computer does not turn on at all.
- The computer turns on but immediately turns off.
- Unstable computer operation: spontaneous reboots, freezes.
- A burning smell or smoke comes from the system unit.
- Some computer components (e.g., video card, hard drive) do not work.
- Strange noises from the power supply (clicks, humming).
Diagnosis of Power Supply Failures
- Visual inspection: Check the appearance of the power supply for damage, bulging capacitors, and burn marks.
- Voltage check with a multimeter: If you have experience and the necessary knowledge, you can check the output voltages of the power supply using a multimeter.
- Testing with another power supply: The easiest way to diagnose is to connect a known working power supply to the computer. If the problem disappears, then the faulty PSU was the cause.
- Using a power supply tester: There are special testers that allow you to quickly check the operability of the power supply.
If any signs of power supply failure are detected, it is recommended to contact a specialist or replace the power supply, as self-repair can be dangerous and lead to more serious consequences.