HP dc7800 tower manual Red Power LED flashes ten Bad option card

Page 63

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

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

 

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

 

 

until problem is solved.

 

 

 

replace the bad option card.

 

 

 

3.

Replace the system board.

 

 

 

 

 

Red Power LED flashes eleven

11

The current processor

1.

Install a TXT capable processor.

times, once every second,

 

does not support a feature

2.

Disable TXT in the Computer Setup (F10)

followed by a two second

 

previously enabled on this

pause. Beeps stop after fifth

 

system.

 

utility.

iteration but LEDs continue

 

 

3.

Reinstall the original processor.

until problem is solved.

 

 

 

 

 

 

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 57

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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 Safety and Comfort Before You Call for Technical SupportHelpful Hints Troubleshooting Without DiagnosticsHelpful 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 SolutionCause unknown Restart the computer Cause SolutionEnww Solving Power Problems 2Solving Power ProblemsPower supply shuts down intermittently Cause Solution Solving Diskette Problems Solving Diskette Problems3Solving Diskette Problems Invalid system disk message is displayed Cause Solution Cannot format diskette Cause SolutionProblem has occurred with a disk transaction Cause Solution Diskette drive cannot read a diskette Cause SolutionSecurity Password Options 4Solving Hard Drive Problems Solving Hard Drive ProblemsDevice Configuration Solving Hard Drive ProblemsStorage Boot Order list Computer will not boot from hard drive Cause SolutionTroubleshooting Without Diagnostics Can not write to the media card Cause Solution Solving Media Card Reader ProblemsSolving Media Card Reader Problems 5Solving Media Card Reader ProblemsTroubleshooting Without Diagnostics Blank screen no video Cause Solution Solving Display ProblemsSolving Display Problems 6Solving Display ProblemsDim 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 Sound cuts in and out Cause Solution Solving Audio ProblemsSolving Audio Problems 7Solving Audio ProblemsLine-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 Select Shut Down Solving Keyboard and Mouse Problems9Solving Keyboard Problems 10Solving Mouse ProblemsSolving Keyboard and Mouse Problems Solving Hardware Installation Problems 11Solving Hardware Installation ProblemsComputer will not start Cause Solution Option card Solving Hardware Installation ProblemsGoes away Once bad card is identified, remove and replace badSolving 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 Some fans only operate when needed Solving Processor ProblemsSolving Processor Problems 14Solving Processor ProblemsMovie will not play in the DVD drive Cause Solution Solving CD-ROM and DVD Problems15Solving CD-ROM and DVD Problems Mode in Security Password OptionsCannot eject compact disc tray-load unit Cause Solution Solving CD-ROM and DVD ProblemsSystem will not boot from USB Drive Key Cause Solution Solving Drive Key Problems16Solving Drive Key Problems USB Drive Key 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 Contacting Customer SupportPost 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 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.

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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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