Check that both power supply cables are | HP dx7300 manual

Table A-2Diagnostic Front Panel LEDs and Audible Codes (continued)

Activity	Beeps	Possible Cause	Recommended Action

Red Power LED flashes nine	9	System powers on but is	1.	Check that the voltage selector, located on
times, once every second,		unable to boot.		the rear of the power supply (some models),
followed by a two second				is set to the appropriate voltage. Proper
pause. Beeps stop after fifth				voltage setting depends on your region.
iteration but LEDs continue			2.	Unplug the AC power cord from the
until problem is solved.			2.	Unplug the AC power cord from the
				computer, wait 30 seconds, then plug the
				power cord back in to the computer.
			3.	Replace the system board.
			4.	Replace the processor.

Red Power LED flashes ten	10	Bad option card.	1.	Check each option card by removing the card
times, once every second,				(one at a time if multiple cards), then power
followed by a two second				on the system to see if fault goes away.
pause. Beeps stop after fifth			2.	Once a bad card is identified, remove and
iteration but LEDs continue			2.	Once a bad card is identified, remove and
until problem is solved.				replace the bad option card.
			3.	Replace the system board.

System does not power on and	None	System unable to power	Press and hold the power button for less than 4
LEDs are not flashing.		on.	seconds. If the hard drive LED turns green, the
			power button is working correctly. Try the
			following:
			1.	Check that the voltage selector (some
				models), located on the rear of the power
				supply, is set to the appropriate voltage.
				Proper voltage setting depends on your
				region.
			2.	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. If the
				problem persists, replace the system board.
			5.	If the 5V_aux light on the system board is not
				turned on, remove the expansion cards one

at a time until the 5V_aux light on the system board turns on. It the problem persists, replace the power supply.

ENWW	Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 59

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HP dx7300 manual Check that both power supply cables are

Contents

Troubleshooting Guide 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 Test Tab Log Tab Protecting the Software Protecting the SoftwareSelect a language and click Download HP Backup and Recovery Manager Safety and Comfort Safety and Comfort Before You Call for Technical Support Helpful Hints Helpful Hints Computer date and time display is incorrect Cause Solution Solving General Problems1Solving General Problems There is no sound or sound volume is too low Cause Solution Solving General ProblemsCannot remove computer cover or access panel Cause Solution Poor performance is experienced Cause Solution Cause Solution Run Windows XP or Start Accessories Run Hard drive LED does not turn on green then Power supply shuts down intermittently Cause Solution Solving Power Problems2Solving Power Problems 3Solving Diskette Problems Solving Diskette ProblemsSolving 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 Solution Boot Storage Boot OrderSecurity Password Options Storage Storage Options Removable Media 4Solving Hard Drive Problems Solving Hard Drive ProblemsHard drive error occurs Cause Solution Disk transaction problem Cause Solution Nonsystem disk/NTLDR missing message Cause Solution Solving Hard Drive ProblemsComputer will not boot from hard drive Cause Solution Computer seems to be locked up Cause Solution Again Solving Media Card Reader Problems Solving Media Card Reader Problems5Solving Media Card Reader Problems Can not write to the media card Cause Solution Enww Solving Display Problems Solving Display Problems6Solving Display Problems Blank screen no video Cause Solution Dim characters Cause Solution Out of Range displays on screen Cause Solution Image is not centered Cause Solution Certain typed symbols do not appear correct Cause Solution Solving Audio Problems Solving Audio Problems7Solving Audio Problems Sound cuts in and out Cause Solution Sound from headphones is not clear or muffled Cause Solution 8Solving Printer Problems Solving Printer ProblemsSolving Printer Problems Select Shut Down Solving Keyboard and Mouse Problems9Solving Keyboard Problems 10Solving Mouse Problems Solving Keyboard and Mouse Problems Computer will not start Cause Solution Solving Hardware Installation Problems11Solving Hardware Installation Problems Goes away Solving Hardware Installation ProblemsOnce bad card is identified, remove and replace bad Option card Wake-on-LAN feature is not functioning Cause Solution Solving Network Problems12Solving Network Problems Diagnostics reports a failure Cause Solution Solving Network ProblemsNetwork status link light never flashes Cause Solution New network card will not boot Cause Solution Solving Memory Problems Solving Memory Problems13Solving Memory Problems Out of memory error Cause Solution Insufficient memory error during operation Cause Solution Solving Processor Problems Solving Processor Problems14Solving Processor Problems Some fans only operate when needed Mode in Security Password Options Solving CD-ROM and DVD Problems15Solving CD-ROM and DVD Problems Cannot eject compact disc tray-load unit Cause Solution Solving CD-ROM and DVD ProblemsMovie will not play in the DVD drive Cause Solution Enww Solving Drive Key Problems Solving Drive Key Problems16Solving Drive Key Problems USB Drive Key not found identified Cause Solution 17Solving Front Panel Component Problems Solving Front Panel Component Problems Solving Internet Access Problems Solving Internet Access Problems18Solving Internet Access Problems Unable to connect to the Internet Cause Solution Modem Click on System and MaintenanceDouble-clickAgere Systems PCI-SV92PP Soft 19Solving Software Problems Solving Software ProblemsSolving Software Problems Contacting Customer Support 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 action Post Numeric Codes and Text Messages On the Documentation and Diagnostics CD Advanced Onboard Devices Control panel message Description Sata Under Storage DPS Self-test Enww 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 Cmos Figure B-1 Cmos button Locate, press, and hold the Cmos button in for five seconds Drive Protection System DPS Select Storage DPS Self-Test Accessing DPS Through Computer Setup Index