Enww | HP dc5750 guide

Table 2-1Solving General Problems (continued)

System does not power on and the LEDs on the front of the computer are not flashing.

Cause	Solution

System unable to power on.

Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, then:

1.Check that the voltage selector, located on the rear of the power supply on some models, is set to the appropriate voltage. Proper voltage setting depends on your region.

2.Remove the expansion cards one at a time until the 5V_aux light on the system board turns on.

3.Replace the system board.

OR

Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on green then:

1.Check that the unit is plugged into a working AC outlet.

2.Open hood and check that the power button harness is properly connected to the system board.

3.Check that both power supply cables are properly connected to the system board.

4.Check to see if the 5V_aux light on the system board is turned on. If it is turned on, then replace the power button harness.

5.If the 5V_aux light on the system board is off, then replace the power supply.

6.Replace the system board.

ENWW	Solving General Problems 13

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HP dc5750 manual Enww

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 Cmos 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 Safety and Comfort Before You Call for Technical Support 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 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 Solution Security Password Options Overrides the Boot Order enable command 4Solving Hard Drive Problems Solving Hard Drive Problems Device Configuration Solving Hard Drive ProblemsStorage Boot Order list Computer will not boot from hard drive Cause Solution Computer’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 Solution Solving Media Card Reader Problems 6Solving Display Problems Solving Display ProblemsBlank screen no video Cause Solution Dim characters Cause Solution Solving Display Problems Out 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 image Certain typed symbols do not appear correct Cause Solution 7Solving Audio Problems Solving 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 Properties 8Solving Printer Problems Solving Printer Problems 10Solving Mouse Problems Solving Keyboard and Mouse ProblemsSolving Keyboard and Mouse Problems 9Solving Keyboard Problems After the shutdown is complete, plug the mouse Option and then press the Enter keyRestart Computer will not start Cause Solution Solving Hardware Installation ProblemsSolving Hardware Installation Problems 11 Solving Hardware Installation Problems Option card 11Solving Hardware Installation ProblemsGoes away Once bad card is identified, remove and replace bad Wake-on-LAN feature is not functioning Cause Solution Solving Network ProblemsSolving Network Problems 12Solving Network Problems Network status link light never flashes Diagnostics reports a failure Cause Solution New 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 Solution Solving Memory Problems Make sure the processor heatsink is installed properly Solving Processor Problems14Solving Processor Problems Some fans only operate when needed Mode in Security Password Options Solving CD-ROM and DVD ProblemsSolving CD-ROM and DVD Problems 15Solving CD-ROM and DVD Problems Cannot eject compact disc tray-load unit Cause Solution Movie will not play in the DVD drive Cause Solution Enww System will not boot from USB Drive Key Cause Solution Solving Drive Key Problems16Solving Drive Key Problems USB Drive Key not found identified 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 Double-clickPorts COM & LPT Solving Internet Access Problems 19Solving Software Problems Solving Software Problems Contacting Customer Support Contacting Customer Support Enww 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 Messages Post Numeric Codes and Text Messages Advanced Onboard Devices Replace diskette drive Control panel message Description 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 Is not spinning, make sure the fans cable is Table A-2Diagnostic Front Panel LEDs and Audible Codes Activity 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 board Cmos Resetting the Password Jumper Using Computer Setup to Reset Cmos Clearing and Resetting the Cmos Figure B-1 Cmos switch Drive Protection System DPS Select Storage DPS Self-Test Accessing DPS Through Computer Setup Index Index Enww