How To Test If Power Supply Is Dead?

Power supply is a vital component that provides electricity to different parts of a computer or any electronic device. If the power supply malfunctions or fails to function, it can cause damage to other components and may even result in the system shut down. It is, therefore, important to check whether the power supply is working correctly or not.

Various signs can indicate a dead power supply, including no power to the system, flickering or flashing of the computer screen, abnormal fan noise, or unusual odors coming from the system. In this post, we will discuss how to test if the power supply of your computer or any electronic device is dead or not. We will provide you step-by-step guidance and valuable insights on what to look for, enabling you to detect and troubleshoot any power supply-related issues.

How to Test If Power Supply is Dead?

How to Test if Power Supply is Dead?

There are several ways to test if a power supply is dead. Some of them are as follows:

1. Visual Inspection: Check the power supply for any visual signs of damage such as burnt out capacitors or a damaged fan.

2. Testing with a Multimeter: A multimeter is a device used to measure voltage, current, and resistance. To use this method, set the multimeter to DC voltage, plug in the power supply and test the voltage output of the power supply. If the multimeter shows no output voltage, the power supply may be dead.

3. Disconnect Equipment: Disconnect all equipment from the power supply and try turning it on. If the power supply doesn’t turn on, it may be dead.

4. Paperclip Method: This is a simple method that involves shorting the green and black wires of the power supply’s 24-pin connector with a paperclip. If the power supply turns on, it means it’s working.

5. Swap Test: If you have another power supply that is compatible with your system, swap it with the suspected bad power supply. If the system powers on with the new power supply, then the original power supply might be dead.

All these methods will help you determine if a power supply is dead, and aid in troubleshooting what may be causing the problem.


1. How to determine if a power supply is dead?
Answer: You can conduct a quick visual inspection of the power supply or use a multimeter to check the voltage output of the power supply.

2. What are the signs of a dead power supply?
Answer: Some common signs of a dead power supply include a lack of power to the device, no response when the device is turned on, or unusual noise coming from the supply.

3. Can a dead power supply cause damage to my computer?
Answer: Yes, a dead power supply can cause damage to your computer. It can cause the system to fail or even damage other components if there is a power surge.

4. Can I repair a dead power supply myself?
Answer: It is possible to repair a dead power supply, but it is not recommended unless you have the necessary knowledge and experience. It is best to seek the help of a professional.

5. How do I replace a dead power supply?
Answer: To replace a dead power supply, you need to purchase a new one that matches the specifications of your old power supply. Remove the old power supply from the device, connect the new one, and test it to make sure it works.


In conclusion, it is important to know how to test if a power supply is dead in order to troubleshoot system problems effectively. Following the steps outlined above can help you determine if your power supply is faulty and needs to be replaced. Remember to take necessary safety precautions before beginning any testing, such as grounding yourself and turning off power to the system. With a little knowledge and effort, you can ensure that your computer or other electronic device is operating optimally and avoid costly repairs or replacements.

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