HP dc7800 tower manual 17Solving Front Panel Component Problems

Page 49

Solving Front Panel Component Problems

If you encounter problems with devices connected to the front panel, refer to the common causes and solutions listed in the following table.

Table 2-17Solving Front Panel Component Problems

A USB device, headphone, or microphone is not recognized by the computer.

Cause

Solution

 

 

 

Device is not properly connected.

1.

Turn off the computer.

 

2.

Reconnect the device to the front of the computer and

 

 

restart the computer.

 

 

The device does not have power.

If the USB device requires AC power, be sure one end is

 

connected to the device and one end is connected to a live

 

outlet.

 

 

 

The correct device driver is not installed.

1.

Install the correct driver for the device.

 

2.

You might need to reboot the computer.

 

 

 

The cable from the device to the computer does not work.

1.

If possible, replace the cable.

 

2.

Restart the computer.

 

 

 

The device is not working.

1.

Replace the device.

 

2.

Restart the computer.

 

 

USB ports on the computer are disabled in Computer Setup.

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

 

 

 

ENWW

Solving Front Panel Component Problems 43

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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 Select a language and click Download Protecting the SoftwareProtecting the Software HP Backup and Recovery Manager Safety and Comfort Safety and Comfort Before You Call for Technical SupportHelpful Hints Troubleshooting Without DiagnosticsHelpful 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 ProblemsCannot remove computer cover or access panel Cause Solution Poor performance is experienced Cause SolutionCause unknown Restart the computer Cause SolutionEnww 2Solving Power Problems Solving Power ProblemsPower supply shuts down intermittently Cause Solution Solving Diskette Problems Solving Diskette Problems3Solving 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 SolutionSecurity Password Options 4Solving Hard Drive Problems Solving Hard Drive ProblemsStorage Boot Order list Solving Hard Drive ProblemsComputer 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 Out of Range displays on screen Cause Solution Image is not centered 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 SolutionLine-in jack is not functioning properly Cause Solution Sound from headphones is not clear or muffled Cause SolutionSolving Printer Problems Solving Printer Problems8Solving Printer Problems 9Solving Keyboard Problems Solving Keyboard and Mouse Problems10Solving Mouse Problems Select Shut DownSolving Keyboard and Mouse Problems 11Solving Hardware Installation Problems Solving Hardware Installation ProblemsComputer will not start Cause Solution Goes away Solving Hardware Installation ProblemsOnce bad card is identified, remove and replace bad Option card12Solving Network Problems Solving Network ProblemsWake-on-LAN feature is not functioning Cause Solution Network status link light never flashes Cause Solution Solving Network ProblemsDiagnostics 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 needed15Solving CD-ROM and DVD Problems Solving CD-ROM and DVD ProblemsMode in Security Password Options Movie will not play in the DVD drive Cause SolutionCannot eject compact disc tray-load unit Cause Solution Solving CD-ROM and DVD Problems16Solving Drive Key Problems Solving 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 18Solving Internet Access Problems Solving Internet Access ProblemsUnable to connect to the Internet Cause Solution 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 actionContact an authorized dealer or reseller for Advanced Onboard Devices Computer Setup or Windows utilities Sata Under Storage DPS Self-testKeyboard failure while Network Server Mode Activity Beeps Possible Cause Recommended Action Table A-2Diagnostic Front Panel LEDs and Audible CodesUse 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 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
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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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