HP dx7300 manual Helpful Hints

Page 15

●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 49 for more information.

●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 on page 32 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 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 Test Tab Log Tab Protecting the Software Select a language and click DownloadProtecting the Software HP Backup and Recovery Manager 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 Poor performance is experienced Cause Solution Solving General ProblemsThere is no sound or sound volume is too low Cause Solution Cannot remove computer cover or access panel Cause SolutionCause Solution Run Windows XP or Start Accessories RunHard drive LED does not turn on green then 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 SolutionStorage Storage Options Removable Media Storage Boot OrderBoot Security Password OptionsDisk transaction problem Cause Solution Solving Hard Drive Problems4Solving Hard Drive Problems Hard drive error occurs Cause SolutionComputer seems to be locked up Cause Solution Solving Hard Drive ProblemsNonsystem disk/NTLDR missing message Cause Solution Computer will not boot from hard drive Cause SolutionAgain Can not write to the media card Cause Solution Solving Media Card Reader ProblemsSolving Media Card Reader Problems 5Solving Media Card Reader ProblemsEnww Blank screen no video Cause Solution Solving Display ProblemsSolving Display Problems 6Solving Display ProblemsDim characters Cause Solution Out of Range displays on screen Cause Solution Image is not centered Cause SolutionCertain typed symbols do not appear correct Cause Solution Sound cuts in and out Cause Solution Solving Audio ProblemsSolving Audio Problems 7Solving Audio ProblemsSound from headphones is not clear or muffled Cause Solution Solving Printer Problems Solving Printer Problems8Solving Printer Problems Solving Keyboard and Mouse Problems 9Solving Keyboard ProblemsSelect Shut Down 10Solving Mouse Problems Solving Keyboard and Mouse ProblemsSolving Hardware Installation Problems 11Solving Hardware Installation ProblemsComputer will not start Cause Solution Option card Solving Hardware Installation ProblemsGoes away Once bad card is identified, remove and replace badSolving Network Problems 12Solving Network ProblemsWake-on-LAN feature is not functioning Cause Solution Solving Network Problems Network status link light never flashes Cause SolutionDiagnostics reports a failure Cause Solution New network card will not boot Cause Solution Out of memory error Cause Solution Solving Memory ProblemsSolving Memory Problems 13Solving Memory ProblemsInsufficient memory error during operation Cause Solution Some fans only operate when needed Solving Processor ProblemsSolving Processor Problems 14Solving Processor ProblemsSolving CD-ROM and DVD Problems 15Solving CD-ROM and DVD ProblemsMode in Security Password Options Solving CD-ROM and DVD Problems Movie will not play in the DVD drive Cause SolutionCannot eject compact disc tray-load unit Cause Solution Enww USB Drive Key not found identified Cause Solution Solving Drive Key ProblemsSolving Drive Key Problems 16Solving Drive Key Problems17Solving Front Panel Component Problems Solving Front Panel Component ProblemsUnable to connect to the Internet Cause Solution Solving Internet Access ProblemsSolving Internet Access Problems 18Solving Internet Access ProblemsClick on System and Maintenance Double-clickAgere Systems PCI-SV92PP SoftModem Solving Software Problems Solving Software Problems19Solving Software Problems Contacting Customer Support 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 On the Documentation and Diagnostics CDAdvanced Onboard Devices Control panel message Description Sata Under Storage DPS Self-testEnww Keyboard failure while Network Server Mode Table A-2Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Check that both power supply cables are Cmos Resetting the Password Jumper Using Computer Setup to Reset Cmos Clearing and Resetting the CmosFigure B-1 Cmos button Locate, press, and hold the Cmos button in for five secondsDrive Protection System DPS Select Storage DPS Self-Test Accessing DPS Through Computer SetupIndex

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