HP dc5750 manual Helpful Hints

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●Turn up the brightness and contrast controls of the monitor if the monitor is dim.

●Press and hold any key. If the system beeps, then the keyboard should be operating correctly.

●Check all cable connections for loose connections or incorrect connections.

●Wake the computer by pressing any key on the keyboard or pressing the power button. If the system remains in suspend mode, shut down the computer by pressing and holding the power button for at least four seconds then press the power button again to restart the computer. If the system will not shut down, unplug the power cord, wait a few seconds, then plug it in again. The computer will restart if automatic start on power loss is set in Computer Setup. If it does not restart, press the power button to start the computer.

●Reconfigure the computer after installing a non–plug and play expansion board or other option. See Solving Hardware Installation Problems for instructions.

●Be sure that all the needed device drivers have been installed. For example, if you are using a printer, you need a driver for that model printer.

●Remove all bootable media (diskette, CD, or USB device) from the system before turning it on.

●If you have installed an operating system other than the factory-installed operating system, check to be sure that it is supported on the system.

●If the system has multiple video sources (embedded, PCI, or PCI-Express adapters) installed (embedded video on some models only) and a single monitor, the monitor must be plugged into the monitor connector on the source selected as the primary VGA adapter. During boot, the other monitor connectors are disabled and if the monitor is connected into these ports, the monitor will not function. You can select which source will be the default VGA source in Computer Setup.

CAUTION When the computer is plugged into an AC power source, there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

ENWW	Helpful Hints 9

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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 Protecting the Software Select a language and click DownloadProtecting the Software Restoring the Software Safety and Comfort Safety and Comfort Before You Call for Technical SupportHelpful Hints Helpful Hints Solving General Problems 1Solving General ProblemsComputer date and time display is incorrect Cause Solution Solving General Problems There is no sound or sound volume is too low Cause SolutionPoor performance is experienced Cause Solution Cause Solution Enww Solving Power Problems 2Solving Power ProblemsPower supply shuts down intermittently Cause Solution Solving Diskette Problems Solving Diskette Problems3Solving Diskette Problems Invalid system disk message is displayed Cause Solution Cannot format diskette Cause SolutionProblem has occurred with a disk transaction Cause Solution Diskette drive cannot read a diskette Cause SolutionSecurity Password Options Overrides the Boot Order enable command4Solving Hard Drive Problems Solving Hard Drive ProblemsDevice Configuration Solving Hard Drive ProblemsStorage Boot Order list Computer will not boot from hard drive Cause SolutionComputer’s software is used to safely eject the card Solving Media Card Reader Problems5Solving Media Card Reader Problems Can not write to the media card Cause SolutionSolving Media Card Reader Problems Solving Display Problems 6Solving Display ProblemsBlank screen no video Cause Solution Dim characters Cause Solution Solving Display ProblemsOut of Range displays on screen Cause Solution Install the video drivers included in the upgrade kitImage is not centered Cause Solution Adjust the horizontal or vertical position of the imageCertain typed symbols do not appear correct Cause Solution Solving Audio Problems 7Solving Audio ProblemsSound cuts in and out Cause Solution Audio for this CD-ROM device is checked Solving Audio ProblemsOn the Properties tab, make sure Enable digital CD Properties8Solving Printer Problems Solving Printer Problems10Solving Mouse Problems Solving Keyboard and Mouse ProblemsSolving Keyboard and Mouse Problems 9Solving Keyboard ProblemsOption and then press the Enter key After the shutdown is complete, plug the mouseRestart Computer will not start Cause Solution Solving Hardware Installation ProblemsSolving Hardware Installation Problems 11 Solving Hardware Installation ProblemsOption card 11Solving Hardware Installation ProblemsGoes away Once bad card is identified, remove and replace badWake-on-LAN feature is not functioning Cause Solution Solving Network ProblemsSolving Network Problems 12Solving Network ProblemsNetwork status link light never flashes Diagnostics reports a failure Cause SolutionNew network card will not boot Cause Solution Memory count during Post is wrong Cause Solution Solving Memory Problems13Solving Memory Problems Out of memory error Cause SolutionSolving Memory Problems Make sure the processor heatsink is installed properly Solving Processor Problems14Solving Processor Problems Some fans only operate when neededMode in Security Password Options Solving CD-ROM and DVD ProblemsSolving CD-ROM and DVD Problems 15Solving CD-ROM and DVD ProblemsCannot eject compact disc tray-load unit Cause Solution Movie will not play in the DVD drive Cause SolutionEnww System will not boot from USB Drive Key Cause Solution Solving Drive Key Problems16Solving Drive Key Problems USB Drive Key not found identified Cause SolutionSolving Front Panel Component Problems Solving Front Panel Component Problems17Solving Front Panel Component Problems Solving Internet Access Problems 18Solving 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 Control panel message Description Recommended action Appendix a Post Error MessagesPost Numeric Codes and Text Messages Table A-1Numeric Codes and Text MessagesPost Numeric Codes and Text Messages Advanced Onboard Devices Replace diskette drive Control panel message DescriptionUnder Storage DPS Self-test Problem Problem goes away Network Server Mode Active and No Emulation back to RAID and select FileSave 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 Check to see if the 5Vaux light on Check that both power supply cables areProblem persists, replace the system board Properly connected to the system boardCmos 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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