HP dc5850 Replace one device at a time and repeat, This procedure until failure occurs. Replace

Page 61

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

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

 

Red Power LED flashes four

4

Power failure (power

1.

Open the hood and ensure the 4 or 6-wire

times, once every second,

 

supply is overloaded).

 

power supply cable is seated into the

followed by a two second

 

 

 

connector on the system board.

pause. Beeps stop after fifth

 

 

2.

Check if a device is causing the problem by

iteration but LEDs continue

 

 

until problem is solved.

 

 

 

removing ALL attached devices (such as

 

 

 

 

hard, diskette, or optical drives, and

 

 

 

 

expansion cards). Power on the system. If

 

 

 

 

the system enters the POST, then power off

 

 

 

 

and replace one device at a time and repeat

 

 

 

 

this procedure until failure occurs. Replace

 

 

 

 

the device that is causing the failure.

 

 

 

 

Continue adding devices one at a time to

 

 

 

 

ensure all devices are functioning properly.

 

 

 

3.

Replace the power supply.

 

 

 

4.

Replace the system board.

 

 

 

 

Red Power LED flashes five

5

Pre-video memory error.

CAUTION: To avoid damage to the DIMMs or

times, once every second,

 

 

the system board, you must unplug the computer

followed by a two second

 

 

power cord before attempting to reseat, install, or

pause. Beeps stop after fifth

 

 

remove a DIMM module.

iteration but LEDs continue

 

 

1.

Reseat DIMMs.

until problem is solved.

 

 

 

 

 

2.

Replace DIMMs one at a time to isolate the

 

 

 

 

faulty module.

 

 

 

3.

Replace third-party memory with HP

 

 

 

 

memory.

 

 

 

4.

Replace the system board.

 

 

 

 

Red Power LED flashes six

6

Pre-video graphics error.

For systems with a graphics card:

times, once every second,

 

 

1.

Reseat the graphics card.

followed by a two second

 

 

pause. Beeps stop after fifth

 

 

2.

Replace the graphics card.

iteration but LEDs continue

 

 

until problem is solved.

 

 

3.

Replace the system board.

 

 

 

 

 

 

For systems with integrated graphics, replace the

 

 

 

system board.

 

 

 

 

Red Power LED flashes seven

7

System board failure

Replace the system board.

times, once every second,

 

(ROM detected failure

 

 

followed by a two second

 

prior to video).

 

 

pause. Beeps stop after fifth

 

 

 

 

iteration but LEDs continue

 

 

 

 

until problem is solved.

 

 

 

 

 

 

 

 

 

Red Power LED flashes eight

8

Invalid ROM based on bad

1.

Reflash the system ROM with the latest BIOS

times, once every second,

 

checksum.

 

image. See the “Boot Block Emergency

followed by a two second

 

 

 

Recovery Mode” section of the Desktop

pause. Beeps stop after fifth

 

 

 

Management Guide for more information.

iteration but LEDs continue

 

 

2.

Replace the system board.

until problem is solved.

 

 

 

 

 

 

 

Red Power LED flashes nine

9

System powers on but is

1.

Check that the voltage selector, located on

times, once every second,

 

unable to boot.

 

the rear of the power supply (some models),

followed by a two second

 

 

 

is set to the appropriate voltage. Proper

pause. Beeps stop after fifth

 

 

 

voltage setting depends on your region.

 

 

 

2.

Unplug the AC power cord from the

 

 

 

 

computer, wait 30 seconds, then plug the

 

 

 

 

power cord back in to the computer.

 

 

 

 

 

ENWW

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 55

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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 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 Helpful 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 ProblemsPoor performance is experienced Cause Solution Cause Solution Enww 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 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 SolutionComputer 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 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 Drivers for a new expansion board were installedNetwork controller requires drivers Solving Memory Problems Solving Memory Problems13Solving Memory Problems Enww 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 Solution Solving CD-ROM and DVD ProblemsCannot eject compact disc tray-load unit 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 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 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 Activity Beeps Possible Cause Recommended Action Table A-2Diagnostic Front Panel LEDs and Audible CodesIs not spinning, make sure the fans cable is 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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dc5850 specifications

The HP dc5850 is a desktop computer that was designed for business environments, offering a blend of performance, reliability, and efficiency. Released during the height of the mid-2000s, this system is powered by AMD processors, particularly the Athlon or Phenom series, which ensures that it can handle various computational tasks with ease.

The dc5850 features a compact chassis that adheres to the Microtower form factor. This design not only saves space but also allows for easier upgrades and maintenance. The unit typically supports a range of RAM configurations, with options for up to 8GB of DDR2 memory. This flexibility enables the user to tailor the system's performance according to their needs, whether for basic office tasks or more demanding applications.

Storage options on the HP dc5850 include a 3.5-inch HDD that can accommodate substantial data, with capacities typically ranging from 160GB to 1TB. The inclusion of a SATA interface ensures fast data transfer rates, which is essential for improving overall system performance. Moreover, the dc5850 boasts multiple USB ports, including USB 2.0 and sometimes even USB 3.0, facilitating easy connectivity with peripherals such as printers, scanners, and external drives.

Graphics capabilities on the dc5850 are generally provided by integrated solutions, although users have the option to add discrete graphics cards for enhanced performance in visual tasks. The system often comes with integrated audio, which supports basic multimedia needs without requiring additional sound cards.

In terms of connectivity, the HP dc5850 features built-in Ethernet for wired networking and may also offer options for Wi-Fi capabilities via PCI expansion slots. This makes it suitable for networked business environments, enabling seamless integration into office infrastructures.

The system is designed with energy efficiency in mind, complying with various environmental standards, thereby reducing its carbon footprint. This aspect may also lead to lower operational costs for businesses focused on sustainability.

Overall, the HP dc5850 stands out as a versatile desktop solution, catering to the essential needs of small to medium-sized businesses. With its combination of performance, expandability, and energy efficiency, it remains a noteworthy choice for users seeking reliable computing power in a compact and manageable form.
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