Help required: PC won’t turn on (flashing fan lights)

Title: Troubleshooting a Non-Responsive PC: When Your Computer Won’t Power On and Emergency Solutions

Introduction:

Encountering a PC that refuses to turn on can be a frustrating experience, especially when conventional troubleshooting doesn’t reveal an obvious cause. Recently, a user shared their ordeal where their computer suddenly shut down and now refuses to power up, despite several components having been recently replaced or addressed. In this article, we’ll walk through the common causes of such issues, analyze the specific scenario, and provide professional guidance to help reanimate your system.

Understanding the Scenario:

The user’s PC, equipped with a Ryzen 5 5700X3D processor, AMD RX 6600 GPU, 32GB DDR4 RAM, and a GIGABYTE B550M DS3H motherboard, suddenly powered down and now exhibits no response when attempting to start it. Key details include:

• Recent replacement of the power supply unit (PSU)
• Previous GPU timeout issues that have been resolved
• No evident hardware button faults, confirmed via video evidence
• The system was functioning intermittently before this shutdown
• Suspected motherboard failure, though not confirmed

Common Causes of a PC Not Powering On:

1. Power Supply Issues:
2. Even with a recent PSU replacement, the unit could be faulty or incompatible.

3. Check all power connections, including the 24-pin motherboard and 8-pin CPU connector.

4. Motherboard Failures:

5. Motherboards can fail due to power surges, manufacturing defects, or hardware faults.

6. Symptoms include no response on power button and no LED indicators.

7. Short Circuits or Faulty Components:

8. Short circuits caused by dust, loose screws, or damaged hardware.

9. RAM modules, GPU, or other components may be improperly seated or defective.

10. Peripherals and External Devices:

11. Disconnect all peripherals to rule out external interference.

12. Internal Hardware Connections:

13. Verify that the power switch cable from the case is correctly connected to the motherboard.
14. Try performing a minimal boot: disconnect non-essential hardware and attempt to start with only CPU, one RAM stick, and power supply.

Step-by-Step Troubleshooting Approach:

1. Check Power Connections:
   Ensure that all power cables are robustly connected. This includes the 24-pin motherboard connector and the 8-pin CPU power cable.

2. Perform a Hard Reset:

3. Turn off the power supply.