HP dc7800 tower manual 4Solving Hard Drive Problems

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Solving Hard Drive Problems

Table 2-4Solving Hard Drive Problems

Hard drive error occurs.

Cause

Solution

 

 

Hard disk has bad sectors or has failed.

1.In Microsoft Windows XP, right-click Start, click Explore, and select a drive. Select File > Properties > Tools. Under Error-checking, click Check Now.

In Microsoft Windows Vista, right-click Start, click Explore, and right-click on a drive. Select Properties then select the Tools tab. Under Error- checking click Check Now.

2.Use a utility to locate and block usage of bad sectors. If necessary, reformat the hard disk.

Disk transaction problem.

Cause

Solution

 

 

Either the directory structure is bad or there is a problem with a file.

In Microsoft Windows XP, right-click Start, click Explore, and select a drive. Select File > Properties > Tools. Under Error- checking, click Check Now.

In Microsoft Windows Vista, right-clickStart, click Explore, and right-click on a drive. Select Properties then select the Tools tab. Under Error-checking click Check Now.

Drive not found (identified).

Cause

Solution

 

 

Cable could be loose.

Check cable connections.

 

 

The system may not have automatically recognized a newly

See reconfiguration directions in the Solving Hardware

installed device.

Installation Problems on page 32 section. If the system still

 

does not recognize the new device, check to see if the device

 

is listed within Computer Setup. If it is listed, the probable

 

cause is a driver problem. If it is not listed, the probable cause

 

is a hardware problem.

 

If this is a newly installed drive, run the Computer Setup utility

 

and try adding a POST delay under Advanced > Power-On.

 

 

The device is attached to a SATA port that has been hidden in

Run the Computer Setup utility and ensure Device Available

Computer Setup.

is selected for the device's SATA port in Security > Device

 

Security.

 

 

Drive responds slowly immediately after power-up.

Run Computer Setup and increase the POST Delay in

 

Advanced > Power-On Options.

 

 

Nonsystem disk/NTLDR missing message.

 

 

 

Cause

Solution

 

 

The system is trying to start from a diskette that is not bootable.

Remove the diskette from the diskette drive.

 

 

18 Chapter 2 Troubleshooting Without Diagnostics

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Contents Troubleshooting Guide Troubleshooting Guide Iii Iv About This Book Table of contents Accessing DPS Through Computer Setup HP Insight Diagnostics HP Insight DiagnosticsSurvey Tab Test Tab Log Tab Protecting the Software Select a language and click DownloadProtecting the Software HP Backup and Recovery Manager Safety and Comfort Before You Call for Technical Support Safety and ComfortTroubleshooting Without Diagnostics Helpful HintsHelpful Hints Solving General Problems 1Solving General ProblemsComputer date and time display is incorrect Cause Solution Solving General Problems There is no sound or sound volume is too low Cause SolutionCannot remove computer cover or access panel Cause Solution Poor performance is experienced Cause SolutionCause Solution Cause unknown Restart the computerEnww Solving Power Problems 2Solving 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 SolutionSecurity Password Options Solving Hard Drive Problems 4Solving Hard Drive ProblemsSolving Hard Drive Problems Storage Boot Order listComputer will not boot from hard drive Cause Solution Device ConfigurationTroubleshooting Without Diagnostics Solving Media Card Reader Problems Solving Media Card Reader Problems5Solving Media Card Reader Problems Can not write to the media card Cause SolutionTroubleshooting Without Diagnostics Solving Display Problems Solving Display Problems6Solving Display Problems Blank screen no video Cause SolutionDim characters Cause Solution Image 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 Solving Audio Problems7Solving Audio Problems Sound cuts in and out Cause SolutionSound from headphones is not clear or muffled Cause Solution Line-in jack is not functioning properly Cause SolutionSolving Printer Problems Solving Printer Problems8Solving Printer Problems Solving Keyboard and Mouse Problems 9Solving Keyboard Problems10Solving Mouse Problems Select Shut DownSolving Keyboard and Mouse Problems Solving Hardware Installation Problems 11Solving Hardware Installation ProblemsComputer will not start Cause Solution Solving Hardware Installation Problems Goes awayOnce bad card is identified, remove and replace bad Option cardSolving Network Problems 12Solving Network ProblemsWake-on-LAN feature is not functioning Cause Solution Solving Network Problems Network status link light never flashes Cause SolutionDiagnostics reports a failure Cause Solution New network card will not boot Cause Solution Solving Memory Problems Solving Memory Problems13Solving Memory Problems Troubleshooting Without Diagnostics Solving Processor Problems Solving Processor Problems14Solving Processor Problems Some fans only operate when neededSolving CD-ROM and DVD Problems 15Solving CD-ROM and DVD ProblemsMode in Security Password Options Movie will not play in the DVD drive Cause SolutionSolving CD-ROM and DVD Problems Cannot eject compact disc tray-load unit Cause SolutionSolving Drive Key Problems 16Solving Drive Key ProblemsUSB Drive Key not found identified Cause Solution System will not boot from USB Drive Key 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 Solving Internet Access Problems Click on System and MaintenanceDouble-clickAgere Systems PCI-SV92PP Soft ModemSolving Software Problems 19Solving 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 actionContact an authorized dealer or reseller for Advanced Onboard Devices Computer Setup or Windows utilities Under Storage DPS Self-test SataKeyboard failure while Network Server Mode Table A-2Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended ActionUse the Smart ID technology before Red Power LED flashes ten Bad option card Cmos Resetting the Password Jumper Resetting the Password JumperClearing and Resetting the Cmos Locate, press, and hold the Cmos button in for five seconds Figure B-1 Cmos buttonDrive Protection System DPS Accessing DPS Through Computer Setup Select Storage DPS Self-TestIndex
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dc7800 tower specifications

The HP dc7800 Tower is a powerful desktop computer designed for professional and enterprise environments. Known for its stability, performance, and versatility, this model has secured its place in a variety of business settings. Launched in the mid-2000s, it embodies HP’s commitment to quality and innovation.

One of the main features of the HP dc7800 is its form factor. The tower configuration allows for easy upgrades and maintenance, providing ample space for additional hard drives, memory, and other components. This level of accessibility makes it ideal for businesses that need to adapt their systems to changing requirements.

The dc7800 is powered by Intel's Core 2 Duo processors, offering dual-core technology that enhances multitasking capabilities. With clock speeds ranging from 1.8 GHz to 3.0 GHz, this system can handle demanding applications with relative ease. It also supports Intel's vPro technology, which allows for remote management and security features, making it an excellent choice for organizations prioritizing IT control.

Another notable characteristic is the support for up to 8GB of DDR2 RAM. This allows for efficient data processing and improved performance when running multiple applications simultaneously. Additionally, the dc7800 features multiple storage options, accommodating both SATA hard drives and solid-state drives, which can significantly enhance boot times and overall system responsiveness.

Connectivity options on the HP dc7800 are robust. It includes a variety of USB ports, audio jacks, and optional legacy ports, ensuring compatibility with a wide range of peripherals and accessories. Networking capabilities are also prominent, with built-in Gigabit Ethernet providing high-speed internet access.

Furthermore, the desktop tower is designed with energy efficiency in mind. It meets ENERGY STAR certification standards, which not only helps reduce operational costs but also minimizes environmental impact.

Overall, the HP dc7800 Tower embodies a blend of performance, expandability, and energy efficiency, making it a reliable choice for businesses in need of a robust desktop solution. With its legacy of dependability and its suite of modern technologies, it continues to serve as a valuable asset in enterprise environments.
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