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Understanding Power Supply Issues

For all of your computer components to receive the proper voltage and input current they need, a power supply unit, or your PSU, is important. That is why, when issues arise with your PSU, it can lead to different problems in your computer- ranging from random power shutdowns to even a complete system failure. So it is important to recognize and address these issues promptly to maintain the health of your computer.

Common Power Supply Problems


Overheating is a very common problem caused by inadequate cooling, dissipated power proportion or dust buildup. These factors may lead to a power supply failure and may also damage other components in your computer.
Solution: It is important that you routinely and regularly clean the PSU and make sure that there is enough airflow within your computer case.
Computer Cooling

Loose Connections

Your computer system may become unstable when there are loose connections with your power lines.
Solution: Make sure to check that all your output connections are correct and securely fastened, not loose.
Computer Troubleshooting

Insufficient Power

An underpowered PSU can’t provide enough power for all components, leading to crashes and shutdowns.
Solution: You can try upgrading to a PSU with a higher wattage to support your system's needs.
Calculating PSU Wattages

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Diagnosing Power Supply Issues

Q: How do I know if my power supply is bad?
A: A faulty power supply may cause unpredictable shutdowns, crashes and an inability to start. Try using a power supply tester to determine if your PSU is functioning properly.
Q: What is a symptom of a failing power supply?
A: Unexpected shutdowns even without a power button, system freezes, and a burning smell from the PSU.

Q: What causes a defective power supply?
A: Common causes are electrical surges, electrostatic discharge, overheating, reversed polarity, and malfunctioning in your computer.
Diagnosing Power Supply Issues

How to Fix a Faulty Power Supply

First, check that all power connections are properly fastened before you begin to avoid more power supply problems.

Test the PSU next. A power supply tester can check the output voltage and see if it meets the requirements for your system.
Third, if it is broken, replace your old PSU with a new, higher wattage unit.

To avoid more problems, check if your new PSU has an overcurrent protection device (OCP)
Replacing Power Supply

Preventing Power Supply Failure

Regular Maintenance
Keep your computer clean and dust-free. Check that there is good airflow in your computer components to prevent overheating and electrical fires.
Surge Protection
Using a surge protector will protect your computer from electrical surges and lightning strikes..
Proper Wattage
Remember to choose a PSU with the right wattage for your system's requirements. Most power supplies are available in various wattages, so select ones that can handle your computer components.
Computer Cleaning

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On-Site Computer Repairs: Serving all areas across Sydney.

  • Canterbury-Bankstown
  • Eastern Suburbs
  • Hawkesbury
  • Hills District
  • Inner West
  • Liverpool
  • Lower North Shore
  • Macarthur
  • Northern Beaches
  • Northern Suburbs
  • Parramatta
  • St George
  • Sutherland Shire
  • Upper North Shore
  • Sydney CBD
  • Western Sydney

Please Call To Book A Sydney Computer Repairs Sydney Technician

Lvl 17/9 Castlereagh St, Sydney, 
NSW 2000, Australia

(+61) 02 8091 0815

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More In-Depth Details:

A power supply unit (PSU) converts AC power from the wall outlet to DC power used by the computer’s components. It provides multiple output connections to deliver the necessary power to the motherboard, CPU, GPU, and other devices.

  • Overheating: Dust buildup and poor ventilation can cause the PSU to overheat.

  • Loose Connections: Ensure all cables are secure to avoid power loss.

  • Inadequate Power: A PSU that doesn’t provide sufficient wattage can lead to instability.

Regular cleaning, using surge protectors, and upgrading to a higher wattage PSU and electrolytic capacitors can prevent many common issues and ensure your system runs efficiently even with a heavy load.

Power supply issues can be a major headache, but Nimble Nerds is here to help. Our experienced technicians provide fast, reliable solutions to diagnose and fix any power supply problems. Whether you need a repair, replacement, or just some expert advice, we’re here to ensure your computer stays powered and running smoothly.

Resolve your tech troubles today—call now and connect with a top technician within 30 minutes!