HP dc7900 11Solving Hardware Installation Problems, Computer will not start Cause Solution

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Solving Hardware Installation Problems

You may need to reconfigure the computer when you add or remove hardware, such as an additional drive or expansion card. If you install a plug and play device, Windows automatically recognizes the device and configures the computer. If you install a non–plug and play device, you must reconfigure the computer after completing installation of the new hardware. In Windows, use the Add Hardware Wizard and follow the instructions that appear on the screen.

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.

Table 2-11Solving Hardware Installation Problems

A new device is not recognized as part of the system.

Cause

Solution

 

 

Device is not seated or connected properly.

Ensure that the device is properly and securely connected and

 

that pins in the connector are not bent down.

 

 

Cable(s) of new external device are loose or power cables are

Ensure that all cables are properly and securely connected and

unplugged.

that pins in the cable or connector are not bent down.

 

 

Power switch of new external device is not turned on.

Turn off the computer, turn on the external device, then turn on

 

the computer to integrate the device with the computer system.

 

 

When the system advised you of changes to the configuration,

Reboot the computer and follow the instructions for accepting

you did not accept them.

the changes.

 

 

A plug and play board may not automatically configure when

Use Windows Device Manager to deselect the automatic

added if the default configuration conflicts with other devices.

settings for the board and choose a basic configuration that

 

does not cause a resource conflict. You can also use Computer

 

Setup to reconfigure or disable devices to resolve the resource

 

conflict.

 

 

USB ports on the computer are disabled in Computer Setup.

Enter Computer Setup (F10) and enable the USB ports.

 

 

Computer will not start.

 

 

 

Cause

Solution

 

 

Wrong memory modules were used in the upgrade or memory modules were installed in the wrong location.

1.Review the documentation that came with the system to determine if you are using the correct memory modules and to verify the proper installation.

NOTE: DIMM 1 must always be installed.

2.Observe the beeps and LED lights on the front of the computer. Beeps and flashing LEDs are codes for specific problems.

3.If you still cannot resolve the issue, contact Customer Support.

ENWW

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Contents Troubleshooting Guide Troubleshooting Guide Iii Iv About This Book Table of contents Accessing DPS Through Computer Setup Solving Software Problems Contacting Customer SupportHP Insight Diagnostics HP Insight DiagnosticsSurvey Tab Test Tab Log Tab Protecting the Software Click the Download buttonProtecting 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 SolutionYou do not want to launch automatically Cause SolutionEnww Solving Power Problems 2Solving Power ProblemsPower supply shuts down intermittently Cause Solution Solving Power Problems Drive not found Cause Solution Solving Diskette Problems3Solving Diskette Problems Diskette drive light stays on Cause SolutionDiskette drive cannot read a diskette Cause Solution Solving Diskette ProblemsCannot format diskette Cause Solution Problem has occurred with a disk transaction Cause SolutionSecurity Password Options Cannot Boot to Diskette Cause SolutionStorage Boot Order BootSolving Hard Drive Problems Solving Hard Drive Problems4Solving Hard Drive Problems Device Configuration Nonsystem disk/NTLDR missing message Cause SolutionStorage Boot Order list Computer will not boot from hard drive Cause SolutionAgain Solving Media Card Reader Problems 5Solving Media Card Reader ProblemsCan not write to the media card Cause Solution Solving Media Card Reader Problems Personalization, select Adjust screen resolution Solving Display Problems6Solving Display Problems Blank screen no video Cause SolutionDim characters Cause Solution Solving Display ProblemsImage is not centered Cause Solution Out of Range displays on screen Cause SolutionSelect ImageControl/ Horizontal Position or Vertical Certain typed symbols do not appear correct Cause Solution Solving Audio Problems 7Solving Audio ProblemsSound cuts in and out Cause Solution Solving Audio Problems Line-in jack is not functioning properly Cause SolutionAdvanced Device Options Internal Speaker 8Solving Printer Problems Solving Printer Problems10Solving Mouse Problems Solving Keyboard and Mouse ProblemsSolving Keyboard and Mouse Problems 9Solving Keyboard ProblemsEnww Computer will not start Cause Solution Solving Hardware Installation ProblemsSolving Hardware Installation Problems 11Solving Hardware Installation ProblemsGoes away Once bad card is identified, remove and replace badOption card Wake-on-LAN feature is not functioning Cause Solution Solving Network ProblemsSolving Network Problems 12Solving Network ProblemsDiagnostics reports a failure Cause Solution Network status link light never flashes Cause SolutionNew 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 SolutionInsufficient memory error during operation Cause Solution Solving Memory ProblemsMake sure the processor heatsink is installed properly Solving Processor Problems14Solving Processor Problems Some fans only operate when neededMode in Security Password Options Solving CD-ROM and DVD ProblemsSolving CD-ROM and DVD Problems 15Solving CD-ROM and DVD ProblemsCannot eject compact disc tray-load unit Cause Solution Movie will not play in the DVD drive Cause SolutionEnww System will not boot from USB flash drive Cause Solution Solving USB Flash Drive Problems16Solving USB Flash Drive Problems USB flash drive not found identified Cause SolutionSolving Front Panel Component Problems Solving Front Panel Component Problems17Solving Front Panel Component Problems Solving Internet Access Problems 18Solving Internet Access ProblemsUnable to connect to the Internet Cause Solution Modem Solving Internet Access ProblemsClick on System and Maintenance Double-clickAgere Systems PCI-SV92PP Soft19Solving Software Problems Solving Software ProblemsContacting Customer Support Post Error Messages Control panel message Description Recommended action Post Numeric Codes and Text MessagesPost Numeric Codes and Text Messages Table A-1Numeric Codes and Text MessagesContact an authorized dealer or reseller for Verify monitor is attached and turned Sata Under Storage DPS Self-testSave Changes and Exit Emulation to IDE, and select File SaveSelect Security Drivelock Security Emulation back to RAID and select FileKeyboard failure while Network Server Mode Activity Beeps Possible Cause Recommended Action Table A-2Diagnostic Front Panel LEDs and Audible CodesReplace one device at a time and repeat Red Power LED flashes eight Invalid ROM based on bad Enww Cmos Resetting the Password Jumper Clearing and Resetting the Cmos Figure 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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dc7900 specifications

The HP dc7900 is a well-regarded desktop solution that serves as a testament to HP's commitment to performance, reliability, and user accessibility. Introduced as part of HP’s Compaq line and designed primarily for business professionals, the dc7900 combines powerful processing capabilities with a compact form factor that suits various office environments.

One of the standout features of the HP dc7900 is its robust configuration options. It typically comes equipped with Intel's Core 2 Duo or Quad processors, giving users the ability to handle demanding applications seamlessly. The inclusion of Intel's technologies, such as Intel vPro, enhances remote management and IT control, making it an ideal choice for businesses looking to streamline their operations.

The dc7900 is designed with flexibility in mind. It offers multiple form factors, including mini-tower, small form factor, and ultra-slim desktop configurations. This variety enables organizations to choose a model that best fits their workspace requirements, maximizing both efficiency and aesthetics. The small footprint models are particularly beneficial in space-constrained environments, while the mini-tower version provides expandability for future upgrades.

In terms of graphics capabilities, the HP dc7900 typically features integrated Intel graphics, with options to install discrete graphics cards for users who require enhanced visual performance. This makes the dc7900 suitable for tasks ranging from standard office applications to more graphics-intensive responsibilities.

Connectivity is another key characteristic of the HP dc7900. It is equipped with a variety of ports, including USB 2.0 and audio jacks, allowing users to connect peripherals easily. Additionally, the dc7900 supports legacy connections, making it easier for businesses with older equipment to integrate new systems without hassle.

Durability and reliability are hallmarks of the HP dc7900. Built with high-quality materials and subjected to rigorous testing, this desktop is designed to withstand the demands of a bustling office environment. Furthermore, HP's comprehensive warranty and support options assure businesses of the reliability of their investment.

The HP dc7900 is not just a powerful desktop; it’s a versatile and dependable solution for modern businesses. With its combination of performance, expandability, and solid build quality, the dc7900 remains a relevant choice for those looking to enhance their productivity and efficiency in the workplace.
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