1Solving General Problems | HP dc5750 instruction

Solving General Problems

You may be able to easily resolve the general problems described in this section. If a problem persists and you are unable to resolve it yourself or if you feel uncomfortable about performing the operation, contact an authorized dealer or reseller.

WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

Look for the LED on the system board. If the LED is illuminated, the system still has power. Power off the computer and remove the power cord before proceeding.

Table 2-1Solving General Problems

Computer appears locked up and will not turn off when the power button is pressed.

Cause	Solution

Software control of the power switch is not functional.

1.Press and hold the power button for at least four seconds until the computer turns off.

2.Disconnect the power cord from the electrical outlet.

Computer will not respond to USB keyboard or mouse.

Cause	Solution

Computer is in standby mode.

To resume from standby mode, press the power button.

CAUTION When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data.

System has locked up.	Restart computer.

Computer date and time display is incorrect.

Cause	Solution

RTC (real-time clock) battery may need to be replaced.

NOTE Connecting the computer to a live AC outlet prolongs the life of the RTC battery.

First, reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Hardware Reference Guide on the Documentation and Diagnostics CD for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement.

10 Chapter 2 Troubleshooting Without Diagnostics

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HP dc5750 manual 1Solving General Problems, Computer date and time display is incorrect Cause Solution

Contents

Troubleshooting Guide dc5750 Models Troubleshooting Guide Iii Iv About This Book Table of contents Appendix B Password Security and Resetting Cmos Accessing DPS Through Computer Setup HP Insight Diagnostics HP Insight Diagnostics Survey Tab Status Tab Log Tab Select a language and click Download Protecting the SoftwareProtecting the Software Restoring the Software Safety and Comfort Before You Call for Technical Support Safety and Comfort Helpful 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 Cannot format diskette Cause Solution Problem has occurred with a disk transaction Cause SolutionDiskette drive cannot read a diskette Cause Solution Invalid system disk message is displayed Cause Solution Overrides the Boot Order enable command Security Password Options Solving Hard Drive Problems 4Solving Hard Drive Problems Solving Hard Drive Problems Storage Boot Order listComputer will not boot from hard drive Cause Solution Device Configuration Solving Media Card Reader Problems 5Solving Media Card Reader ProblemsCan not write to the media card Cause Solution Computer’s software is used to safely eject the card Solving Media Card Reader Problems 6Solving Display Problems Solving Display ProblemsBlank screen no video Cause Solution Solving Display Problems Dim characters Cause Solution Install the video drivers included in the upgrade kit Image is not centered Cause SolutionAdjust the horizontal or vertical position of the image Out of Range displays on screen Cause Solution Certain typed symbols do not appear correct Cause Solution 7Solving Audio Problems Solving Audio ProblemsSound cuts in and out Cause Solution Solving Audio Problems On the Properties tab, make sure Enable digital CDProperties Audio for this CD-ROM device is checked Solving Printer Problems 8Solving Printer Problems Solving Keyboard and Mouse Problems Solving Keyboard and Mouse Problems9Solving Keyboard Problems 10Solving Mouse Problems After 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 Solution 11Solving Hardware Installation Problems Goes awayOnce bad card is identified, remove and replace bad Option card Solving Network Problems Solving Network Problems12Solving Network Problems Wake-on-LAN feature is not functioning Cause Solution Diagnostics reports a failure Cause Solution Network status link light never flashes New network card will not boot Cause Solution Solving Memory Problems 13Solving Memory ProblemsOut of memory error Cause Solution Memory count during Post is wrong Cause Solution Solving Memory Problems Solving Processor Problems 14Solving Processor ProblemsSome fans only operate when needed Make sure the processor heatsink is installed properly Solving CD-ROM and DVD Problems Solving CD-ROM and DVD Problems15Solving CD-ROM and DVD Problems Mode in Security Password Options Movie will not play in the DVD drive Cause Solution Cannot eject compact disc tray-load unit Cause Solution Enww Solving Drive Key Problems 16Solving Drive Key ProblemsUSB Drive Key not found identified Cause Solution System will not boot from USB Drive Key Cause Solution Solving 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 Solving Internet Access Problems Double-clickPorts COM & LPT Solving Software Problems 19Solving Software Problems Contacting Customer Support Contacting Customer Support Enww Post Error Messages Appendix a Post Error Messages Post Numeric Codes and Text MessagesTable A-1Numeric Codes and Text Messages Control panel message Description Recommended action Post Numeric Codes and Text Messages Advanced Onboard Devices Control panel message Description Replace diskette drive Under Storage DPS Self-test Emulation back to RAID and select File Problem Problem goes away Network Server Mode Active and NoSave Changes and Exit Table A-2Diagnostic Front Panel LEDs and Audible Codes Is not spinning, make sure the fans cable is Activity Beeps Possible Cause Recommended Action Check that both power supply cables are Problem persists, replace the system boardProperly connected to the system board Check to see if the 5Vaux light on Cmos Resetting the Password Jumper Clearing and Resetting the Cmos Using Computer Setup to Reset Cmos Figure B-1 Cmos switch Drive Protection System DPS Accessing DPS Through Computer Setup Select Storage DPS Self-Test Index Index Enww