知乎盐选 | 第 29 章 快速诊断电脑黑屏不开机故障

Troubleshooting Computer Black Screen and Boot Failure

This guide details how to diagnose and fix computer black screen and failure to boot issues. It systematically addresses potential problems, starting with external power sources and progressing to internal components like the motherboard and power supply.

Diagnosing Computer Failure to Boot

The guide outlines a methodical approach to identify the root cause of the problem. This involves:

• Checking external power sources and connections.
• Inspecting internal connections and components for shorts or obstructions.
• Testing the power supply unit (PSU) by bypassing the power switch.
• Testing the motherboard's power circuits.

If the system boots when the power switch is bypassed, the issue likely lies in the power switch; otherwise, it could be the PSU or motherboard circuits.

Diagnosing Computer Black Screen

Black screen issues are more challenging to diagnose due to the lack of error messages. The article recommends using a combination of techniques including:

• Verifying power supply connections and the PSU itself.
• Checking display and signal cables for damage or incorrect connections.
• Inspecting the internal components for potential problems.

It emphasizes checking for simple issues first, like loose cables, before considering more complex internal faults.