How To Tell If Power Supply Is Dead?

Power supply is an essential component of any computer system, being accountable for providing the necessary power to run the other parts. If the power supply fails to function properly, the computer may encounter severe issues, and the user may find it challenging to identify what the problem is. Therefore, recognizing the signs of a failing power supply is necessary to keep the system running efficiently.

The primary indication of a dead power supply is the absence of electricity flowing through the system. It is crucial to determine whether the issue lies with the power supply or another component of the computer to avoid making any unnecessary repairs or replacements. Further, there are several indicators to check if the power supply is failing, and timely detection can save the user money and prevent a complete system failure.

How to Tell If Power Supply Is Dead?

A power supply is an essential component of a computer that distributes electrical power to other components. Without it, the computer cannot function. To know if your power supply is dead, you need to follow certain indicators that signify the problem.

Here are the steps to follow to determine whether your power supply is faulty:

1. Check the LED light: If the LED light on the power supply is not lit despite the power cable being connected, this is the first indication that the power supply is not functioning.

2. No fan noise: Power supply units usually have fans. If you don’t hear any fan noise when you switch on the computer, it could indicate that the power supply is dead.

3. Burning or unusual smell: Power supply units can sometimes develop issues that result in a burning smell. If you observe any burning or unusual smell from your power supply, it could mean that a component has malfunctioned.

4. Computer won’t turn on: If your computer won’t boot up or turn on despite all efforts, it could signify a faulty power supply.

5. Low voltage: Use a voltmeter to measure the voltage output. If your power supply’s voltage output does not meet the required level, it could mean that the power supply is dead.

6. Power surges: Power surges can disrupt the functioning of your power supply. If you experience regular power surges, it could lead to an eventual power supply malfunction.

In conclusion, these are the essential indicators of a dead power supply. If your computer is suffering any of these issues, consider replacing your power supply with a new unit. It is advisable always to have a high-quality surge protector to avoid possible power supply issues.


1. How do I know if my power supply is dead?
Answer: If your computer won’t turn on, make any sounds, or show any light on the power button, it may indicate a dead power supply.

2. What causes a power supply to die?
Answer: A power supply can die due to a variety of reasons such as overheating, electrical surges, power outages, age and wear and tear.

3. Can I replace a dead power supply myself?
Answer: Yes, but replacing a power supply should only be done by an experienced and qualified technician to avoid any electrical damage.

4. How can I troubleshoot a possible dead power supply?
Answer: To troubleshoot a possible dead power supply, disconnect all power cables and try a different outlet. If it still doesn’t work, you may need to replace the power supply.

5. Can a dead power supply damage my computer?
Answer: A dead power supply cannot damage your computer, but a failing power supply can cause electrical damage to the other components of your computer.


In conclusion, it is essential to know how to tell if your power supply is dead to prevent further damage to your computer system. By following the steps outlined above, you can easily diagnose the issue and take the necessary steps to fix it, whether it’s by replacing the power supply or seeking professional help. Always remember to exercise caution when handling electronic components and consult technical support if you’re unsure about any steps. With careful attention and maintenance, you can ensure that your computer system remains operational and functional for a long time to come.

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