HP dc5750 manual Safety and Comfort Before You Call for Technical Support

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2 Troubleshooting Without Diagnostics

This chapter provides information on how to identify and correct minor problems, such as diskette drive, 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.

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 on the Documentation and Diagnostics CD and available on the Web site at http://www.hp.com/ ergo for more information on choosing a workspace and creating a safe and comfortable work environment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. For more information, refer to Safety & Regulatory Information on the Documentation and Diagnostics CD.

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 diagnostics utility. Refer to Chapter 1, Computer Diagnostic Features for more information.

●Run the Drive Protection System (DPS) Self-Test in Computer Setup. Refer to the Computer Setup (F10) Utility Guide on the Documentation and Diagnostics CD 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 for more information.

●If the screen is blank, plug the monitor into a different video port on the computer if one is available. Or, change out 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.

●If you recently installed new software, uninstall the software and see if the computer functions properly.

ENWW

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Contents Troubleshooting Guide dc5750 Models Troubleshooting Guide Iii Iv About This Book Table of contents Accessing DPS Through Computer Setup Appendix B Password Security and Resetting CmosHP Insight Diagnostics HP Insight DiagnosticsSurvey Tab Status Tab Log Tab Select a language and click Download Protecting the SoftwareProtecting the Software Restoring the Software Safety and Comfort Safety and Comfort Before You Call for Technical SupportHelpful Hints Helpful Hints 1Solving General Problems Solving General ProblemsComputer date and time display is incorrect Cause Solution There is no sound or sound volume is too low Cause Solution Solving General ProblemsPoor performance is experienced Cause Solution Cause Solution Enww 2Solving Power Problems Solving Power ProblemsPower supply shuts down intermittently Cause Solution Solving Diskette Problems Solving Diskette Problems3Solving Diskette Problems Problem has occurred with a disk transaction Cause Solution Cannot format diskette Cause SolutionDiskette drive cannot read a diskette Cause Solution Invalid system disk message is displayed Cause SolutionSecurity Password Options Overrides the Boot Order enable command4Solving Hard Drive Problems Solving Hard Drive ProblemsStorage Boot Order list Solving Hard Drive ProblemsComputer will not boot from hard drive Cause Solution Device Configuration5Solving Media Card Reader Problems Solving Media Card Reader ProblemsCan not write to the media card Cause Solution Computer’s software is used to safely eject the cardSolving Media Card Reader Problems 6Solving Display Problems Solving Display ProblemsBlank screen no video Cause Solution Dim characters Cause Solution Solving Display ProblemsImage is not centered Cause Solution Install the video drivers included in the upgrade kitAdjust the horizontal or vertical position of the image Out of Range displays on screen Cause SolutionCertain typed symbols do not appear correct Cause Solution 7Solving Audio Problems Solving Audio ProblemsSound cuts in and out Cause Solution On the Properties tab, make sure Enable digital CD Solving Audio ProblemsProperties Audio for this CD-ROM device is checked8Solving Printer Problems Solving Printer ProblemsSolving Keyboard and Mouse Problems Solving Keyboard and Mouse Problems9Solving Keyboard Problems 10Solving Mouse ProblemsAfter the shutdown is complete, plug the mouse Option and then press the Enter keyRestart Solving Hardware Installation Problems Solving Hardware Installation Problems11 Solving Hardware Installation Problems Computer will not start Cause SolutionGoes away 11Solving Hardware Installation ProblemsOnce bad card is identified, remove and replace bad Option cardSolving Network Problems Solving Network Problems12Solving Network Problems Wake-on-LAN feature is not functioning Cause SolutionNetwork status link light never flashes Diagnostics reports a failure Cause SolutionNew network card will not boot Cause Solution 13Solving Memory Problems Solving Memory ProblemsOut of memory error Cause Solution Memory count during Post is wrong Cause SolutionSolving Memory Problems 14Solving Processor Problems Solving Processor ProblemsSome fans only operate when needed Make sure the processor heatsink is installed properlySolving CD-ROM and DVD Problems Solving CD-ROM and DVD Problems15Solving CD-ROM and DVD Problems Mode in Security Password OptionsCannot eject compact disc tray-load unit Cause Solution Movie will not play in the DVD drive Cause SolutionEnww 16Solving Drive Key Problems Solving Drive Key ProblemsUSB Drive Key not found identified Cause Solution System will not boot from USB Drive Key Cause SolutionSolving Front Panel Component Problems Solving Front Panel Component Problems17Solving Front Panel Component Problems 18Solving Internet Access Problems Solving Internet Access ProblemsUnable to connect to the Internet Cause Solution Double-clickPorts COM & LPT Solving Internet Access Problems19Solving Software Problems Solving Software ProblemsContacting Customer Support Contacting Customer SupportEnww Post Error Messages Post Numeric Codes and Text Messages Appendix a Post Error MessagesTable A-1Numeric Codes and Text Messages Control panel message Description Recommended actionPost Numeric Codes and Text Messages Advanced Onboard Devices Replace diskette drive Control panel message DescriptionUnder Storage DPS Self-test Emulation back to RAID and select File Problem Problem goes away Network Server Mode Active and NoSave Changes and Exit Is not spinning, make sure the fans cable is Table A-2Diagnostic Front Panel LEDs and Audible CodesActivity Beeps Possible Cause Recommended Action Problem persists, replace the system board Check that both power supply cables areProperly connected to the system board Check to see if the 5Vaux light onCmos Resetting the Password Jumper Using Computer Setup to Reset Cmos Clearing and Resetting the CmosFigure B-1 Cmos switch Drive Protection System DPS Select Storage DPS Self-Test Accessing DPS Through Computer SetupIndex IndexEnww
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