Determining if your Power Supply Just Failed and Why Your System Won't Turn On

Modified on Tue, 24 Oct 2023 at 09:32 AM

Power issues can be a frustrating phenomenon in the world of computing. It is important to decide if the power supply is the main cause of your computer’s refusal to switch on at this point. Here, we will show you how to perform troubleshooting in order to trace the cause of the problem associated with a power supply and revive your device.

What’s the point of power supply?

The PSU is the heart of your power system. It changes the electrical current supplied by your socket with a form accessible to your PC. A failed PSU means that your computer will not get the necessary power to turn on, which results in quite a few problems. 

Troubleshooting Laptop Power Supply Issues

  1. Check the Power Cord: The first step is to ensure that your laptop's power cord is functioning correctly. Inspect the cord for visible damage, and if you suspect an issue, try a different power cord or charger.

  2. Inspect the Charger Indicator Light: Many laptop chargers have an LED indicator light. If it's not lit when the charger is plugged into a power source, the charger may be the problem. If it's lit but your laptop still won't turn on, it may not be delivering the required voltage.

  3. Battery Status: Your laptop may have a depleted battery. Try removing the battery, plugging in the charger, and turning the laptop on. If it powers on without the battery, your battery might need replacement.

  4. Test with Another Charger: If you have access to another compatible charger, try it to see if it resolves the issue. If your laptop turns on with a different charger, your original charger is likely faulty.

  5. Check the Charging Port: Ensure that the charging port on your laptop is clean and free of debris. Dust and dirt can prevent a proper connection between the charger and your laptop.

Troubleshooting Desktop Power Supply Issues

  1. Check the Power Outlet: The first step is to confirm that the power outlet is working correctly. Plug in another device to see if it powers on. If the outlet isn't working, you may need to address an electrical issue.

  2. Inspect the Power Cable: Verify that the power cable is securely connected to both the power outlet and your desktop's power supply. Loose or damaged cables can prevent your computer from receiving power.

  3. Switch Position: Many desktop power supplies have an on/off switch. Ensure that it's in the "On" position.

  4. Test with a Different Cable: If you suspect the cable might be faulty, try using a different power cable.

  5. Inspect the PSU Indicator Light: Some power supplies have an LED indicator light on the back. If this light isn't on, it could indicate a PSU issue. However, not all power supplies have this feature.

  6. Test with a Different Outlet: If your power outlet is functional, try plugging your desktop into a different outlet using a known working cable. This can help eliminate the power source as the problem.

General Troubleshooting Tips

  1. Listen for Sounds: When you attempt to power on your device, listen for any unusual sounds. A clicking noise, for example, can indicate a PSU problem.

  2. Smell for Burnt Odor: If your computer emits a burning odor when you attempt to power it on, it could signify a faulty PSU.

  3. Power Surge: If your area recently experienced a power surge, it may have damaged your PSU. Consider using surge protectors or uninterruptible power supplies (UPS) to safeguard your computer in the future.


Computer users know that troubleshooting power supply problems with laptops and desktops is very important. Following these steps will help you identify if it is indeed the power supply that’s causing your device’s troubles. If you suspect a defective power supply, please take care only to involve an expert technician to carry out diagnoses and replacement. A steady, trustworthy power supply is essential for hassle-free computing.

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