How To Check Your Power Supply?

When it comes to troubleshooting computer issues, one of the most important steps is checking the power supply. This component provides electricity to all the other parts of your computer, and if it’s failing, it can cause a range of problems from random shutdowns to corrupted data. In some cases, a problem with the power supply can even result in permanent damage to other hardware components. To avoid these issues, it’s essential to know how to check your power supply properly.

Before you begin troubleshooting your power supply, it’s important to understand the basics. A power supply converts the AC current from your wall outlet into the DC power your computer components require. These units come in various sizes and wattages, and the specific model you need depends on your computer’s configuration. Checking your power supply can help you identify whether it’s the source of your computer issues, or if there’s another underlying problem that needs addressing.

How to Check Your Power Supply?

Checking the power supply is an essential task that needs to be performed to ensure that your computer is running smoothly. Here are the steps to check your power supply:

1. Turn off your computer: Before proceeding, it is important to turn off your computer and unplug it from the power source.

2. Open the computer case: Most computer cases have screws that need to be removed to open the case. Once the case is open, you can access the power supply.

3. Locate the power supply: The power supply is usually located at the back of the computer case and is connected to the motherboard, hard disk and other peripherals.

4. Check the power supply fan: The fan in the power supply helps to keep it cool. If the fan is not working, it may be a sign of a faulty power supply.

5. Look for any visible damage: Check for any signs of physical damage, such as dents or bulges in the power supply. This may indicate that the power supply needs to be replaced.

6. Check the output voltages: You can use a multimeter to check the output voltages of the power supply. The voltages should be within the range specified by the manufacturer.

7. Check the connectors: Ensure that all the connectors are firmly connected to the power supply and the motherboard. Loose connectors can cause power issues.

8. Replace the power supply: If your power supply is not working properly or is damaged, it is recommended to replace it with a new one.

In conclusion, checking your power supply is a crucial part of maintaining your computer. Following the above steps can help you identify any issues with the power supply and ensure that your computer is running smoothly.


1. What tools do I need to check my power supply?
Answer: To check your power supply, you need a multimeter, a screwdriver, and a grounding strap to ensure your safety while handling electrical components.

2. Can I test my power supply without removing it from my computer?
Answer: Yes, you can test your power supply without removing it from your computer using a multimeter to check the voltage levels.

3. How do I know if my power supply is faulty?
Answer: You can tell if your power supply is faulty if your computer is not powering on, if it shuts down unexpectedly, or if you hear unusual noises like clicking or buzzing coming from the power supply.

4. What is the proper way of disconnecting my power supply from my computer?
Answer: To properly disconnect your power supply from your computer, turn off the power switch on the back of the power supply, unplug the power cord from the outlet, and then disconnect all the cables from the power supply.

5. What is the average lifespan of a power supply?
Answer: The average lifespan of a power supply is around 5-7 years, but this can vary depending on the quality of the power supply and how much it is used. Its lifespan can also be affected by factors like temperature, humidity, and power surges.


In this article, we have discussed the essential steps for checking your power supply. Remember, a faulty power supply can damage your computer components and reduce its lifespan. Therefore, it is crucial to ensure that your power supply is functioning correctly. By following the steps we have outlined, you can quickly diagnose any issues with your power supply and take the appropriate measures to fix them. Always practice caution when dealing with electricity, and if you are uncertain about any steps, consider seeking professional help. Regularly checking your power supply is a crucial part of maintaining your computer’s health, so make sure to add it to your routine maintenance checklist.

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