Computer Power Supply Repair & Replacement – Alex PC Repair

When your computer suddenly shuts down, refuses to start, or shows strange power-related issues, there’s a good chance the culprit is the power supply unit (PSU). At Alex PC Repair, we specialise in diagnosing, repairing, and replacing faulty power supplies for desktops, gaming rigs, and workstations. Whether your PC needs a quick fix or a complete PSU replacement, we make sure it’s done safely, efficiently, and at a fair price.

Why the Power Supply is So Important

The PSU is the heart of your computer’s electrical system. It converts the electricity from your wall socket into the correct voltages your components need. If it fails, nothing in your computer will work properly. A faulty PSU can also cause:

• Random system crashes or freezes
• No power at all when pressing the power button
• Burning smells or strange noises from the case
• Flickering screens or unstable performance
• Damage to other components if not addressed quickly

Common Signs Your PSU Might Be Failing

If you notice any of these symptoms, you should have your system checked by a professional:

1. Frequent Restarts – Sudden reboots during gaming or heavy workloads can indicate power instability.
2. No Power – Computer doesn’t turn on despite a working power outlet and cable.
3. Electrical Smell or Smoke – This is a sign of serious internal damage – turn off the power immediately.
4. Unusual Fan Noises – Grinding, clicking, or high-pitched whining sounds from the PSU fan.
5. Overheating – The PSU gets abnormally hot even when the PC is idle

At Alex PC Repair, we follow a careful step-by-step process to ensure accurate diagnosis and safe repairs:

1. Initial Inspection – We visually check for damage, dust build-up, and loose connections.
2. Voltage Testing – Using specialised tools, we measure the PSU’s output to confirm if it’s delivering the correct power.
3. Component Check – We ensure that no other part of your computer (like the motherboard or GPU) is contributing to the fault.
4. Repair or Replacement Advice – If the PSU can be repaired safely, we’ll fix it. If not, we’ll recommend a high-quality replacement.
5. Installation & Safety Checks – We fit the PSU securely, connect all cables correctly, and test the system under load.
6. Final Testing – We ensure your computer runs smoothly and stably before handing it back.

Tips to Extend Your Power Supply’s Life

1. Keep your PC clean and dust-free.
2. Use a surge protector or UPS (Uninterruptible Power Supply).
3. Avoid overloading your PSU by upgrading it when adding more hardware.
4. Ensure your computer is well-ventilated to prevent overheating.
5. Use only high-quality power supplies to begin with – cheap ones often fail sooner.