HP Commercial Desktop Computer Troubleshooting Guide

About this manual

The guide offers a comprehensive set of troubleshooting procedures for HP commercial desktop computers, covering diagnostics, safety, general problems, power‑supply, disk, hard‑drive, expansion slot, monitor, audio, printer, keyboard/mouse, network, memory, processor, CD‑ROM/DVD and software issues. It also includes POST error codes, password security, CMOS reset, Disk Protection System (DPS) and analog/digital audio output settings.

It explains how to use the Diagnostics for Windows utility, how to access and interpret POST messages, and how to perform hardware tests, reset passwords, and change audio output modes. The document provides step‑by‑step instructions, screenshots of menus, and guidance on printing or saving diagnostic reports. This manual is written in Chinese.

What's inside

• Computer Diagnostics Program Functions
• Diagnostics for Windows
• Safety and Comfort
• General Problems
• Power Supply Problems
• Hard Drive Problems
• Monitor Problems
• Audio Problems
• POST Error Messages
• Password Security and Reset

Frequently asked questions

How do I run Diagnostics for Windows?

Open the Start menu, go to Control Panel and click the Diagnostics for Windows icon, then follow the on‑screen prompts.

How can I reset the CMOS password?

Use the password reset jumper or the Computer Setup utility (F10) to clear and reset the CMOS password as described in the guide.

What does a POST error code indicate?

POST numeric codes and accompanying text messages identify hardware errors detected during the power‑on self‑test.

How do I change the analog/digital audio output mode?

In Windows XP, open Control Panel → Sound, select the Hardware tab, and change the Output Mode setting to Analog, Digital, or Auto.