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How to fix a computer that keeps turning on and off

Dealing with a computer that constantly turns on and off can be frustrating, disrupting work, gaming, or simply browsing the web. But fear not! We’ve got the solutions you need to get your PC back on track. In this guide, we’ll break down the common causes behind this issue and provide simple steps to troubleshoot and fix it.

What’s Causing Your PC to Turn On and Off Repeatedly?

  1. Overheating: Your computer may shut down to prevent damage when it overheats.
  2. Hardware Failures: Faulty hardware components can lead to stability issues.
  3. Loose or Damaged Cables: Check for loose connections or faulty power cables.
  4. Power Supply Issues: Inconsistent power delivery from the power supply can cause cycling on and off.

How to Fix a Computer That Keeps Turning On and Off:

  1. Check for Overheating:
    • Ensure the cooling system isn’t making loud noises and that air vents are clear.
  2. Disconnect Connected Devices:
    • Remove external devices (except the power cord) to isolate the issue.
  3. Verify Power Connections:
    • Ensure the power cord is connected correctly and undamaged.
  4. Inspect the Power Supply Unit (PSU):
    • Check for signs of malfunction such as burning smells, fan failure, or power fluctuations.
  5. Update System Software and Drivers:
    • Keep your operating system and drivers up-to-date to prevent software-related issues.
  6. Boot in Safe Mode:
    • Use Safe Mode to identify if software issues or recent downloads are causing problems.
  7. Reset or Update BIOS Software:
    • Resetting or updating the BIOS can resolve compatibility and hardware issues.
  8. Try System Repair or Reinstallation:
    • Restore your operating system to a previous point to undo recent changes causing issues.


Dealing with a computer that repeatedly turns on and off can be frustrating, but by following these simple troubleshooting steps, you can identify and fix the underlying issues. Whether it’s overheating, hardware failures, or software glitches, there’s a solution to get your PC back up and running smoothly.


  1. Why is overheating a common issue for PCs?

    • Overheating occurs when the cooling system fails to dissipate heat generated by the computer’s components, risking damage if not addressed promptly.
  2. How can I prevent hardware failures in my PC?

    • Regular maintenance, such as cleaning dust buildup, checking for loose connections, and ensuring adequate ventilation, can help prevent hardware failures.
  3. Is it safe to update BIOS software?

    • Updating BIOS software can improve system stability and compatibility, but it’s essential to follow manufacturer instructions carefully and ensure a stable power supply during the update process

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