9Troubleshooting without diagnostics

This chapter provides information on how to identify and correct minor problems, such as USB devices, hard drive, optical drive, graphics, audio, memory, and software problems. If you encounter problems with the computer, refer to the tables in this chapter for probable causes and recommended solutions.

NOTE: For information on specific error messages that may appear on the screen during Power-On Self-Test (POST) at startup, refer to Appendix A, POST error messages on page 236.

Safety and comfort

WARNING! Misuse of the computer or failure to establish a safe and comfortable work environment may result in discomfort or serious injury. Refer to the Safety & Comfort Guide at http://www.hp.com/ ergo for more information on choosing a workspace and creating a safe and comfortable work environment. For more information, refer to the Safety & Regulatory Information guide.

Before you call for technical support

If you are having problems with the computer, try the appropriate solutions below to try to isolate the exact problem before calling for technical support.

●Run the HP diagnostic tool.

●Run the hard drive self-test in Computer Setup. Refer to Computer Setup (F10) Utility on page 180 for more information.

●Check the Power LED on the front of the computer to see if it is flashing red. The flashing lights are error codes that will help you diagnose the problem. Refer to Appendix A, POST error messages on page 236 for more information.

●If the screen is blank, plug the monitor into a different video port on the computer if one is available. Or, replace the monitor with a monitor that you know is functioning properly.

●If you are working on a network, plug another computer with a different cable into the network connection. There may be a problem with the network plug or cable.

●If you recently added new hardware, remove the hardware and see if the computer functions properly.

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