HP dc5850 manual 6Solving Display Problems, Blank screen no video Cause Solution

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Solving Display Problems

If you encounter display problems, see the documentation that came with the monitor and to the common causes and solutions listed in the following table.

Table 2-6Solving Display Problems

Blank screen (no video).

Cause	Solution

Monitor is not turned on and the monitor light is not on.	Turn on the monitor and check that the monitor light is on.

Bad monitor.	Try a different monitor.

The cable connections are not correct.	Check the cable connection from the monitor to the computer
	and to the electrical outlet.

You may have a screen blanking utility installed or energy	Press any key or click the mouse button and, if set, type your
saver features are enabled.	password.

System ROM is corrupted; system is running in Boot Block	Reflash the system ROM with the latest BIOS image. See the
Emergency Recovery Mode (indicated by eight beeps).	“Boot Block Emergency Recovery Mode” section of the
	Desktop Management Guide for more information

You are using a fixed-sync monitor and it will not sync at the	Be sure that the monitor can accept the same horizontal scan
resolution chosen.	rate as the resolution chosen.

Computer is in standby mode.	Press the power button to resume from standby mode.
	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.

Monitor cable is plugged into the wrong connector.

Ensure that the monitor is plugged into an active connector on the rear of the computer. If another connector is available, connect the monitor to that connector and reboot the system.

Monitor settings in the computer are not compatible with the monitor.

1.In Windows XP Control Panel, double-click the Display icon and select the Settings tab.

In Windows Vista Control Panel, under Appearance and Personalization, select Adjust screen resolution.

2.Use the sliding control to reset the resolution.

Cannot enable integrated graphics after installing a PCI Express x16 graphics card.

Cause	Solution

On systems with AMD integrated graphics, the integrated graphics can be enabled in Computer Setup only if an AMD PCI Express x16 graphics card is installed.

On systems with AMD integrated graphics, install an AMD PCI Express x16 graphics card and enable the integrated graphics in Computer Setup.

ENWW	Solving Display Problems 23

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Contents Troubleshooting Guide dc5850 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 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 SupportHelpful Hints Helpful Hints Computer date and time display is incorrect Cause Solution Solving General Problems1Solving General Problems Poor performance is experienced Cause Solution Solving General ProblemsThere is no sound or sound volume is too low Cause Solution Cause Solution Enww 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 SolutionBoot Storage Boot OrderSecurity Password Options Storage Storage Options Removable Media4Solving Hard Drive Problems Solving Hard Drive ProblemsHard drive error occurs Cause Solution Disk transaction problem Cause SolutionNonsystem disk/NTLDR missing message Cause Solution Solving Hard Drive ProblemsStorage Boot Order list Computer will not boot from hard drive Cause Solution Computer seems to be locked up Cause Solution Solving Media Card Reader Problems Solving Media Card Reader Problems5Solving Media Card Reader Problems Can not write to the media card Cause SolutionEnww Solving Display Problems Solving Display Problems6Solving Display Problems Blank screen no video Cause SolutionDim characters Cause Solution Image is not centered Cause Solution Install the video drivers included in the upgrade kitOut of Range displays on screen Cause Solution Select ImageControl/ Horizontal Position or VerticalCertain typed symbols do not appear correct Cause Solution Solving Audio Problems Solving Audio Problems7Solving Audio Problems Sound cuts in and out Cause SolutionUnsaved data Line-in jack is not functioning properly Cause Solution8Solving Printer Problems Solving Printer ProblemsSolving Printer Problems 9Solving Keyboard Problems Solving Keyboard and Mouse Problems10Solving Mouse Problems Select Shut DownSolving 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 cardWake-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 Network controller requires drivers Drivers for a new expansion board were installedNew network card will not boot Cause Solution 13Solving Memory Problems Solving Memory ProblemsSolving Memory Problems Enww Solving Processor Problems Solving Processor Problems14Solving Processor Problems Some fans only operate when neededMode 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 16Solving Drive Key Problems Solving Drive Key ProblemsUSB Drive Key not found identified Cause Solution System will not boot from USB Drive Key Cause Solution17Solving Front Panel Component Problems Solving Front Panel Component ProblemsSolving Front Panel Component Problems Unable to connect to the Internet Cause Solution Solving Internet Access Problems18Solving Internet Access Problems Click on System and Maintenance Solving Internet Access ProblemsDouble-clickAgere Systems PCI-SV92PP Soft Modem19Solving Software Problems Solving Software ProblemsContacting Customer Support Contacting Customer SupportPost Error Messages Post Numeric Codes and Text Messages Post Numeric Codes and Text MessagesTable A-1Numeric Codes and Text Messages Control panel message Description Recommended actionMemory modules If the error persists after replacingMemory modules, replace the system BoardClear CMOS. See Appendix B Flash Screen Image Corrupted Flash Screen image has errorsVerify monitor is attached and turned Replace the graphics card if possibleUnder Storage DPS Self-test Enww Is not spinning, make sure the fans cable is Table A-2Diagnostic Front Panel LEDs and Audible CodesActivity Beeps Possible Cause Recommended Action Device that is causing the failure This procedure until failure occurs. ReplaceReplace one device at a time and repeat Continue adding devices one at a time toProblem persists, replace the system board Check that both power supply cables areProperly connected to the system board Check to see if the 5Vaux light onCmos 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 Index

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