HP 5850 Service Reference Guide: HP Compaq dc5850 Business PC
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- HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 1
Service Reference Guide HP Compaq dc5850 Business PC - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 2
by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company. Service Reference Guide Business PCs First Edition (March 2008) Document Part Number: 481405-001 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 3
About This Book WARNING! Text set off in this manner indicates that failure to follow directions could result in bodily harm or loss of life. CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information. NOTE: Text set - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 4
iv About This Book - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 5
16 Survey Tab ...17 Test Tab ...18 Status Tab ...18 Log Tab ...19 Help Tab ...19 Saving and Printing Information in HP Insight Diagnostics 20 Downloading the Latest Version of HP Insight Diagnostics 20 Protecting the Software ...20 HP Backup and Recovery Manager 21 4 Desktop Management Initial - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 6
Block Emergency Recovery Mode 33 Replicating the Setup ...34 Copying to Single Computer 34 Copying to Multiple Computers 34 Creating a Bootable Device 35 Supported USB Flash Media Device 35 Unsupported USB Flash Media Device 37 Dual-State Power Button ...38 HP Web Site Support ...38 Industry - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 7
SATA Hard Drive Cables ...50 SATA Data Cable ...50 SATA Power Cable ...50 PATA Device Information ...51 ATA SMART Drives ...51 Hard Drive Capacities ...51 6 Identifying the Chassis, Routine Care, and Disassembly Preparation Chassis Designations ...52 Small Form Factor (SFF 52 Microtower (MT) ...53 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 8
Procedures Microtower (MT) Chassis Serial Number Location ...60 Preparation for Disassembly ...61 External Security Devices ...62 Cable Lock ...62 Padlock ...62 HP Business PC Security Lock 63 Front Bezel Security ...65 Computer Access Panel ...66 Front Bezel ...67 Cable Management ...68 Memory - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 9
110 HP Business PC Security Lock 111 Front Bezel Security 113 Computer Access Panel ...114 Front Bezel ...115 Bezel Blanks ...116 Using the Small Form Factor Computer in a Tower Orientation 117 Installing Additional Memory ...119 DIMMs ...119 DDR2-SDRAM DIMMs ...119 Populating DIMM Sockets 120 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 10
D Troubleshooting Without Diagnostics Safety and Comfort ...182 Before You Call for Technical Support 182 Helpful Hints ...183 Solving General Problems ...185 Solving Power Problems ...189 Solving Diskette Problems ...190 Solving Hard Drive Problems ...193 Solving Media Card Reader Problems 196 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 11
Front Panel Component Problems 218 Solving Internet Access Problems ...219 Solving Software Problems ...221 Contacting Customer Support ...222 Appendix E System Board and Riser Board Reference Designators ...223 Appendix F Specifications Microtower Chassis ...229 Small Form Factor Chassis ...231 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 12
xii - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 13
system to the appropriate drivers. Obtain the latest support software , including support software for the operating system from http://www.hp.com/support. Select your country and language, select Download drivers and software, enter the model number of the computer, and press Enter. Installing - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 14
of Windows, all applications, and all data files. Backups can be scheduled to occur automatically at designated intervals, or they can be initiated manually. Important files can be archived separately from regular backups. HP Backup and Recovery Manager is preinstalled on the hard drive's Recovery - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 15
, graphics, memory, audio, storage, communications, and input devices. ● Modify the boot order of bootable devices such as hard drives, diskette drives, optical drives, or USB flash media devices. ● Enable Quick Boot, which is faster than Full Boot but does not run all of the diagnostic tests run - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 16
configuration errors detected but not automatically fixed during the Power-On SelfTest (POST). ● Replicate the system setup by saving system configuration information on diskette and restoring it on one or more computers. ● Execute self-tests on a specified ATA hard drive (when supported by drive - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 17
. Table 2-2 Computer Setup-File Option Description System Information Lists: ● Product name ● SKU number (some models) ● Processor type/speed/stepping ● Cache size (L1/L2) (dual core processors have this listed twice) ● Installed memory size/speed, number of channels (single or dual) (if - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 18
available. ATAPI LS-120: ● None (treated as Other). ● Diskette (treated as diskette drive). Hard Disk ● None (prevents BIOS data accesses and disables it as a boot device). ● Hard Disk (treated as hard disk). Multisector Transfers (ATA disks only) Specifies how many sectors are transferred per - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 19
Emulation mode is selected. For more information on RAID, go to http://www.hp.com/support. Select your country and language, select See support and troubleshooting information, enter the model number of the computer, and press Enter. In the Resources category, click Manuals (guides, supplements - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 20
the DPS self-tests is attached to the system. Boot Order Allows you to: ● Specify the order in which attached devices (such as a USB flash media device, diskette drive, hard drive, optical drive, or network interface card) are checked for a bootable operating system image. Each device on the list - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 21
to change Computer Setup options, flash the ROM, and make changes to certain plug and play settings under Windows. See the Troubleshooting Guide for more information. Power-On Password Allows you to set and enable power-on password. The power-on password prompt appears after a power cycle. If - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 22
, the hard drive will remain inaccessible until one of the passwords is successfully provided during a subsequent cold-boot sequence. NOTE: This selection will only appear when at least one drive that supports the DriveLock feature is attached to the system. See the Desktop Management Guide for - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 23
ability to request a Reset to Factory Settings of the Embedded Security Device. Changing this setting requires turning the computer off and then back on. NOTE: To enable this option, a Setup password must be set. Smart Card BIOS Password Support (some models) (enable/disable) Allows the user to - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 24
Computer Setup-Power NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 2-5 Computer Setup-Power Option Description OS Power Management ● ACPI S3 Hard Disk Reset-Enabling this causes the BIOS to ensure hard disks are ready to accept - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 25
for hard disks on some PCI cards that spin up very slowly, so slowly that they are not ready to boot by the time POST is finished. The POST delay also gives you more time to select F10 to enter Computer (F10) Setup. ● I/O APIC Mode (enable/disable). Enabling this feature will allow Microsoft Windows - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 26
the POST memory test. (some models) BIOS Power-On Allows you to set the computer to turn on automatically at a time you specify. Onboard Devices PCI Devices Allows you to set resources for or disable onboard system devices (diskette controller, serial port, or parallel port). ● Lists currently - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 27
SATA RAID Option ROM Download (enable/disable). The BIOS contains an embedded SATA RAID option ROM to for RAID support. This can be temporarily disabled to save DCH space. Note that with the option ROM disabled, users will be unable to use boot to hard drives in the system while running in RAID mode - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 28
Next. 3. Follow the instructions in the wizard to create a Recovery Disc Set. 4. Use Windows Explorer to search the Recovery Disc Set for the CD with the compaq\hpdiags directory. 5. While the computer is on, insert the CD into an optical drive on the computer. 16 Chapter 3 HP Insight Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 29
-Shows HP Insight Diagnostics version information, computer configuration memory (CMOS) information, system board data, and system management BIOS data. Storage-Shows information about storage media connected to the computer. This list includes all fixed disks, diskette drives, and optical drives - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 30
. The diagnostic software will prompt you for input during tests that require your interaction. You may also determine whether the test passed or failed. ● Unattended Mode-Does not display prompts and requires no interaction. If errors are found, they are displayed when testing is complete. To - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 31
number of times the device has failed a test. ● The Error Code provides a numerical code for the failure. The error codes are defined in the Help tab. The Clear Error Log button will clear the contents of the Error Log. Help Tab On the Help tab contains an HP Insight Diagnostics tab, an Error Codes - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 32
CD from the optical drive. Downloading the Latest Version of HP Insight Diagnostics 1. Go to http://www.hp.com. 2. Click the Software & Driver Downloads link. 3. Enter your product number (for example, dc5850) in the text box and press the Enter key. 4. Select your specific computer model. 5. Select - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 33
of Windows, all applications, and all data files. Backups can be scheduled to occur automatically at designated intervals, or they can be initiated manually. Important files can be archived separately from regular backups. HP Backup and Recovery Manager is preinstalled on the hard drive's Recovery - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 34
Manager, HP Configuration Management Solution (based on Radia technology), or Altiris Deployment Solution, to replace the preinstalled software with a customized software image. ● Using a disk cloning process to copy the contents from one hard drive to another. 22 Chapter 4 Desktop Management - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 35
-loaded on the computer. When installed, it enables communication with the HP management console. To install the HP Software Agent: 1. Click Start. 2. Click All Programs. 3. Click HP Manageability. 4. Click Radia Management Agent Readme. 5. Review and follow the instructions contained in the Readme - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 36
tasks: ● Formatting a hard drive ● Deploying a software image on one or more new PCs ● Remotely updating the system BIOS in flash ROM (Remote ROM Flash on page 32) ● Configuring the system BIOS settings To initiate Remote System Installation, press F12 when the F12 = Network Service Boot message - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 37
how you manage your HP client computers. HP Client Management Interface used in conjunction with system management software can: ● Request in-depth client inventory information-Capture detailed information about the processors, hard drives, memory, BIOS, drivers, including sensor information (such - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 38
editions: ● The Basic Edition is a free product for managing HP desktops, notebooks and workstations, providing hardware and software inventory, remote control, HP alert monitoring, HP BIOS and driver updates, integration with HP Protect Tools and add-on support for Intel AMT. The Basic Edition also - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 39
drivers and BIOS updates without visiting each PC ● Remotely configure BIOS and security settings ● Automate processes to quickly resolve hardware problems Tight integration with HP Instant Support tools reduces hardware troubleshooting time. ● Diagnostics-remotely run & view reports on HP desktop - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 40
information on Altiris Client Management Suite, visit http://www.altiris.com/Products/ ClientManagementSuite.aspx. HP Client Catalog for SMS Update management is an important function of maintaining any set of computers, from a single PC to an enterprise datacenter. The ability to identify which - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 41
, see the white papers at http://www.hp.com/ support. Select your country and language, select See support and troubleshooting information, enter the model number of the computer, and press Enter. In the Resources category, click Manuals (guides, supplements, addendums, etc.). Under Quick jump to - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 42
same time, but both are supported. To configure Intel vPro systems for AMT or ASF: 1. Turn on or restart the computer. If you are in Microsoft Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press the hot key, Ctrl+P, when the monitor light turns green. NOTE: If - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 43
, HP will supply you with personalized product tips, feature articles, and/or driver and support alerts/notifications. Subscriber's Choice Driver and Support Alerts/Notifications will deliver e-mails notifying you that the information you subscribed to in your profile is available for review and - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 44
or overwritten. This is important to ensure the operating integrity of the computer. Should you need or want to upgrade the BIOS, you may download the latest BIOS images from the HP driver and support page, http://www.hp.com/support/files. CAUTION: For maximum ROM protection, be sure to establish - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 45
upgrade the BIOS. 5. Turn the power on to restart the computer. NOTE: BitLocker prevents Windows Vista from booting when a CD containing the BIOS image file is in an optical drive. If BitLocker is enabled, remove this CD before attempting to boot to Windows Vista. Boot Block Emergency Recovery Mode - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 46
or a supported USB flash media device, such as an HP Drive Key. Copying to Single Computer CAUTION: A setup configuration is model-specific. File system corruption may result if source and target computers are not the same model. For example, do not copy the setup configuration from a dc7xxx PC to - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 47
. See Supported USB Flash Media Device on page 35 or Unsupported USB Flash Media Device on page 37. CAUTION: Not all computers can be booted from a USB flash media device. If the default boot order in the Computer Setup (F10) Utility lists the USB device before the hard drive, the computer can be - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 48
CAUTION: Some older PCs may not be bootable from a USB flash media device. If the default boot order in the Computer Setup (F10) Utility lists the USB device before the hard drive, the computer can be booted from a USB flash media device. Otherwise, a bootable diskette must be used. 1. Turn off the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 49
) Utility lists the USB device before the hard drive, the computer can be booted from a USB flash media device. Otherwise, a bootable diskette must be used. 1. If there are any PCI cards in the system that have SCSI, ATA RAID or SATA drives attached, turn off the computer and unplug the power cord - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 50
loss of data on the hard drive. HP Web Site Support HP engineers rigorously test and debug software developed by HP and third-party suppliers, and develop operating system specific support software, to ensure performance, compatibility, and reliability for HP computers. When making the transition to - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 51
easier. You can download the software from http://www.hp.com/support. The Web site contains the latest device drivers, utilities, and flashable ROM images needed to run the latest Microsoft Windows operating system on the HP computer. Industry Standards HP management solutions integrate with - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 52
to change Computer Setup options, flash the ROM, and make changes to certain plug and play settings under Windows. See the Troubleshooting Guide for more information. Power-On Password Allows you to set and enable power-on password. The power-on password prompt appears after a power cycle. If - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 53
one drive that supports the DriveLock feature is attached to the system. For more information about Computer Setup, see the Computer Setup (F10) Utility Guide. Support for security features may vary depending on the specific computer configuration. Password Security The power-on password prevents - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 54
the computer and again press F10 when the monitor light turns green to access the utility. 3. Select Security, then Power-On Password and follow the instructions on the screen. 4. Before exiting, click File > Save Changes and Exit. Entering a Power-On Password To enter a power-on password, complete - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 55
Manager Guide at http://www.hp.com. 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart the Computer. 2. To change the Power-On password, go to step 3. To change the Setup password, as soon as the computer is turned on, press F10 when the monitor light turns - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 56
HP ProtectTools Security Manager Guide at http://www.hp.com. DriveLock DriveLock is an industry-standard security feature that prevents unauthorized access to the data on ATA hard. DriveLock has been implemented as an extension to Computer Setup. It is only available when hard drives that support - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 57
from Windows, if neither attempt succeeds, POST will halt and the user will be instructed to cycle power. DriveLock Applications The most practical use of the DriveLock security feature is in a corporate environment. The system administrator would be responsible for configuring the hard drive which - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 58
activate and lock the Smart Cover Lock, complete the following steps: 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 59
enter the password to disable the lock, you will need a Smart Cover FailSafe Key to open the computer cover. You will need the key in any of the following circumstances: ● Power outage ● Startup failure ● PC component failure (such as processor or power supply) ● Forgotten password CAUTION: The - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 60
onto the drive. Each time DPS is run, test results are written to the hard drive. The service provider can use this information to help diagnose conditions that caused you to run the DPS software. Refer to the Troubleshooting Guide for instructions on using DPS. Surge-Tolerant Power Supply An - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 61
Parallel ATA = PATA HP only supports the use of SATA hard drives on these models of computer. The USDT model is the only product that supports a PATA optical drive. No PATA drives are supported on any other model. SATA Hard Drives Serial ATA Hard Drive Characteristics Number of pins/conductors in - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 62
backwards compatible with the SATA 1.5 Gb/s drives. Current HP desktop products ship with SATA 3.0 Gb/s hard drives. SATA data cables are susceptible to data for only a single drive. As shown in the table, each cable has 3 grounds, and 4 transmit/receive pins. Pin Number Usage P1 Ground P2* A+ - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 63
drives are supported on any other model. ATA SMART Drives The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 64
system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage. Chassis Designations The following subsections illustrate the dc5750 chassis designs. Small Form Factor (SFF) 52 Chapter 6 Identifying the Chassis, Routine - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 65
Microtower (MT) Electrostatic Discharge Information A sudden discharge of static electricity from your integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions. Generating Static The following table - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 66
components and accessories. ● To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes. ● Protect static-free work areas. ● Turn off power and input signals before inserting and removing connectors or test equipment. 54 Chapter 6 Identifying the Chassis, - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 67
or floor mats with hard tie to ground ● Field service kits ● Static awareness monitor to permit the required airflow. ● Never restrict the airflow into the computer by blocking any vents or air intakes. Do not place the keyboard, with the keyboard feet down, directly against the front of the desktop - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 68
guidelines listed above will still apply. ● Keep liquids away from the computer and keyboard. ● Never cover the ventilation slots on the monitor with any type of material. ● Install or enable power management functions of the operating system or other software, including sleep states. Routine - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 69
mouse body, follow the procedures in Cleaning the Computer Case on page 56. Service Considerations Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer. Power Supply Fan The power supply fan is a variable-speed fan based on the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 70
until they are actually mounted in the CPU. ● Avoid dropping drives from any height onto any surface. ● If you are inserting or removing a hard drive, turn off the computer. Do not remove a hard drive while the computer is on or in standby mode. 58 Chapter 6 Identifying the Chassis, Routine Care - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 71
53 ● Do not use excessive force when inserting a drive. ● Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers. Lithium Coin Cell Battery The battery that comes with the computer provides power to the real-time clock and has - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 72
and replacement procedures, run the Diagnostics utility to verify that all components operate properly. NOTE: Not all features listed in this guide are available on all computers. Serial Number Location Each computer has a unique serial number and product ID number that are located on the top - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 73
or "Suspend" modes. The power cord should always be disconnected before servicing a unit. 6. Disconnect the power cord from the electrical outlet and then from the computer. 7. Disconnect all peripheral device cables from the computer. 8. Lay the computer down on its side to achieve a safe working - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 74
External Security Devices The following security devices are used to prevent unauthorized access to the internal components of the computer and/or secure the computer to a fixed object. Cable Lock Padlock 62 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 75
HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. 2. Thread the keyboard and mouse cables through the lock. External Security Devices 63 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 76
3. Screw the lock to the chassis using the screw provided. 4. Insert the plug end of the security cable into the lock (1) and push the button in (2) to engage the lock. Use the key provided to disengage the lock. 64 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 77
Front Bezel Security The front bezel can be locked in place by installing a security screw provided by HP. The security screw is located on the fan duct inside the chassis. To lock the front bezel, remove the security screw from the fan duct (1) - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 78
the captive thumbscrew (1) that secures the access panel to the computer chassis. 3. Slide the access panel back (2) about 1.3 cm (1/2 inch), then lift it off the unit. To install the access panel, reverse the removal procedure. 66 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 79
for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Press outward on the two latches on the right side of the bezel and the single latch on the left - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 80
computer. ● Keep cables away from major heat sources like the heatsink. ● Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like the drive cage, power supply, or computer cover to power supply. 68 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 81
memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory support, you can populate the system board with up to 8 GB of memory configured in a highperforming dual channel mode addition, the computer supports: ● 512Mbit and 1Gbit non-ECC memory technologies ● - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 82
the white sockets, they could be a pair of 512-MB or 1024-MB DIMMs and the system would still operate in dual channel mode. For purposes of "like sizes," a single-sided 512-MB DIMM and a double-sided 512-MB DIMM would not be the same size because they have different numbers of memory chips on - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 83
. When upgrading the memory, it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other. Static electricity can damage the electronic components of the computer or optional cards. Before - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 84
on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Locate the correct vacant expansion socket on the system board and the corresponding expansion slot on the back of the computer chassis. 72 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 85
remove the expansion slot cover or the existing expansion card. NOTE: Before removing an installed expansion card, disconnect any cables that may be attached to the expansion card. a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion slot cover on the back - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 86
frame. Be sure not to scrape the card against the other components. 6. Store the removed card in anti-static packaging. 7. If you are not installing a new expansion card, install an expansion slot cover to close the open slot. 74 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 87
it snaps securely in place. 10. Connect external cables to the installed card, if needed. Connect internal cables to the system board, if needed. 11. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for instructions on using Computer Setup. Expansion Cards 75 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 88
labeled FLPY. ● Connect a media card reader to the USB connector labeled MEDIA. ● The system does not support Parallel ATA (PATA) optical drives or PATA hard drives. ● You may install either a third-height or a half-height drive into a half-height bay. ● You must install guide screws to ensure the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 89
not drop it. Do not use excessive force when inserting a drive. Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers. If a drive must be mailed, place the drive in a bubble-pack mailer or other protective packaging and label - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 90
No. System Board Connector System Board Label 1 Diskette Drive FLPY 2 Media Card Reader MEDIA 3 SATA0 SATA0 4 SATA1 SATA1 5 SATA2 SATA2 6 SATA3 SATA3 Color black black dark blue white light blue orange 78 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 91
optional drive (media card reader shown) 3 Primary 3.5-inch internal hard drive bay 4 Secondary 3.5-inch internal hard drive bay for optional hard drive To verify the type and size of the storage devices installed in the computer, run Computer Setup. Refer to the Computer Setup (F10) Utility Guide - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 92
a 5.25-inch optical drive, disconnect the power cable (1) and data cable (2) from the back of the drive. b. If you are removing a diskette drive, disconnect the data cable (1) and power cable (2) from the back of the drive. 80 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 93
card reader, disconnect the USB cable from the system board. 5. A latch drive bracket with release tabs secures the drives in the drive bay. Lift the release tab on the latch drive bracket (1) for the drive you want to remove, then slide the drive from its drive bay (2). 6. Remove the four guide - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 94
of the chassis frame next to the power supply. NOTE: Optical drives, diskette drives, and media card readers use M3 metric guide screws. Four extra metric guide screws are provided on the interior of the chassis frame next to the power supply. The HP-supplied metric screws are black. Refer to - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 95
Slide the drive into the drive bay, making sure to align the guide screws with the guide slots, until the drive snaps into place. 4. Connect the power and data cables to the drive as indicated in the following illustrations. a. If you are installing an optical drive, connect the power cable (1) and - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 96
card reader, connect the USB cable from the media card reader to the USB connector on the system board labeled MEDIA. Refer to System Board Drive Connections on page 78 for an illustration of the system board drive connectors. 84 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 97
the new hard drive. Also, if you are replacing the primary hard drive, make sure you have created a Recovery Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. If you do not have this CD set, select Start > HP Backup and - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 98
the drive into the drive bay, making sure to align the guide screws with the guide slots, until the drive snaps into place. The upper bay is for the primary hard drive. The bottom bay is for an optional secondary hard drive. 86 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 99
Reconnect the power cord and any external devices, then turn on the computer. 8. Lock any security devices that were disengaged when the access panel was removed. NOTE: If you are replacing the primary hard drive, use the Recovery Disc Set to restore the operating system, software drivers, and any - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 100
Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. If you do not have this CD set, select Start > HP Backup and Recovery and create it now. 1. Unlock the hard drive carrier with the key provided and slide the carrier - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 101
4. Remove the four screws from the bottom of the hard drive carrier. 5. Slide the hard drive back to disconnect it from the carrier then lift it up and out of the carrier. Drives 89 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 102
's circuit board. Be sure the connector on the hard drive is pressed all the way into the connector on the carrier's circuit board. 7. Replace the four screws in the bottom of the carrier to hold the drive securely in place. 90 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 103
cover on the carrier (1) and replace the screw on the rear of the carrier to secure the cover in place (2). 10. Slide the hard drive carrier into the enclosure on the computer and lock it with the key provided. NOTE: The carrier must be locked for power to be supplied to the hard drive. Drives 91 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 104
card. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect the main power main power cable to the system board. 92 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 105
for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the hard drive cable from the clip on top of the baffle. 4. Slide the baffle toward the rear of the chassis until the tab on the top of - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 106
for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Unplug the fan cable from the system board (CHFAN, P9). the cable back into the system board. 94 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 107
for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove the front bezel (Front Bezel on page 67). 4. Disconnect the front I/O cable from the blue system board connector (P6) and the USB cable from the yellow system board connector (FRONT_USB - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 108
Power Switch/LED Assembly 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer rotate away from the chassis while threading the cable between the drive cage and the front of the chassis, then through the Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 109
. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 110
Computer Access Panel on page 66). 3. Remove the heatsink (Heatsink on page 97). 4. Rotate the locking lever to its full open position (1). 5. Raise and rotate the microprocessor retainer to its fully open position (2). 6. Carefully lift the processor from the socket Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 111
important as the pins on the socket are very fragile and any damage to update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files. Speaker 1. Prepare the computer - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 112
, POWER FAN). 4. Remove the four silver Phillips screws that secure the fan to the chassis. 5. Lift the fan out of the chassis. To install the fan assembly, reverse the removal procedure. Be sure to orient the air flow out of the unit. 100 Chapter 7 Removal and Replacement Procedures Microtower (MT - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 113
is installed in an expansion card slot, and you can use expansion card removal and replacement procedures to remove and install it. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 114
Remove the computer access panel (Computer Access Panel on page 66). 3. Disconnect all power cables from the drives and from the system board. 4. Remove the four silver T15 screws that connect the power supply to the chassis. 102 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 115
tab in front of the power supply that holds it in place. 6. Slide the power supply toward the front of the computer, rotate toward the fan so the power supply clears the lip on the top of the chassis, and then lift the power supply out of the chassis. To install the power supply, reverse the removal - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 116
on page 61). 2. Remove the computer access panel (Computer Access Panel on page 66). 3. Remove all expansion boards (Expansion Cards on page 72). 4. Disconnect all board, you must change the chassis serial number in the BIOS. 104 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 117
panel (Computer Access Panel on page 66). NOTE: It may be necessary to remove an expansion card to gain access to the battery. 3. Locate the battery and battery holder on the system board. 4. Depending on the type of battery holder on your system board, complete the following instructions to replace - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 118
the battery in the proper position. 4. Replace the computer access panel. 5. Plug in the computer and turn on power to the computer. 6. Reset the date and time and any special system setups using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 2 Battery Holder 1. To release the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 119
2. Insert the new battery and position the clip back in place. 3. Replace the computer access panel. 4. Plug in the computer and turn on power to the computer. 5. Reset the date and time and any special system setups using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Battery 107 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 120
8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 121
External Security Devices The following security devices are used to prevent unauthorized access to the internal components of the computer and/or secure the computer to a fixed object. Installing a Security Lock The security locks displayed below and on the following pages can be used to secure the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 122
Padlock 110 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 123
HP Business PC Security Lock 1. Fasten the security cable by looping it around a stationary object. 2. Thread the keyboard and mouse cables through the lock. External Security Devices 111 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 124
3. Screw the lock to the chassis using the screw provided. 4. Insert the plug end of the security cable into the lock (1) and push the button in (2) to engage the lock. Use the key provided to disengage the lock. 112 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 125
Front Bezel Security The front bezel can be locked in place by installing a security screw provided by HP. The security screw is located on the fan duct inside the chassis. To lock the front bezel, remove the security screw from the fan duct (1) - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 126
). 2. Press the buttons on the left and right sides of the computer (1) then slide the access panel back until it stops and lift it up and off the chassis (2). To install the access panel, reverse the removal procedure. 114 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 127
disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Lift up the green latch behind the upper right side of the bezel and push down on the latch behind - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 128
the 3.5-inch and 5.25-inch external drive bays that need to be removed before installing a drive. To remove a bezel blank: 1. Prepare the computer for disassembly (Preparation for Disassembly on Replace the front bezel. 116 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 129
Using the Small Form Factor Computer in a Tower Orientation The Small Form Factor computer can be used in a tower orientation. The HP logo plate on the front bezel is adjustable for either desktop or tower orientation. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 61). - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 130
the computer in a tower orientation, HP recommends the use of the optional tower stand. NOTE: Ensure at least 10.2 centimeters (4 inches) of space on all sides of the computer remains clear and free of obstructions. 118 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 131
Installing Additional Memory The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2SDRAM) dual inline memory modules (DIMMs). DIMMs The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 132
. Supported configurations consist of any combination of one, two, three, or four DIMMs as long as socket XMM4 is populated before socket XMM2 in Channel B, and socket XMM3 is populated before socket XMM1 in Channel A. 120 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 133
for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Rotate up the external drive bay housing and the power supply to access the memory module sockets on the system board. WARNING! To reduce risk of personal injury from hot - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 134
Make sure the latches are in the closed position (3). 6. Repeat steps 4 and 5 to install any additional modules. The computer should automatically recognize the additional memory the next time you turn on the computer. 122 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 135
up to 17.46 cm (6.875 inches) in length. The computer also has two PCI Express x1 expansion slots and one PCI Express x16 expansion slot. NOTE: The PCI and PCI Express slots support only low profile cards. Item 1 2 3 4 Description PCI Express x1 expansion slot PCI Express x1 expansion slot PCI - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 136
the expansion card. a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion slot cover on the back of the chassis. Pull the slot cover straight up then away from the inside of the chassis. 124 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 137
, pull the retention arm on the back of the expansion socket away from the card and carefully rock the card back and forth until the connectors pull free from the socket. Pull the expansion card straight up from the socket then away from the inside of the chassis to release it from the chassis frame - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 138
: When installing an expansion card, press firmly on the card so that the whole connector seats properly in the expansion card slot. 9. Rotate the slot cover retention latch back in place to secure the expansion card. 126 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 139
. Connect internal cables to the system board, if needed. 11. Reconfigure the computer, if necessary. Refer to the Computer Setup (F10) Utility Guide for instructions on using Computer Setup. Cable Management The Small Form Factor chassis is very compact and proper routing of the internal cables is - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 140
board connectors are color-coded to make it easier to find the proper connection. Cable Power Supply Power Supply Power Supply Power Supply Power Supply Power Supply To System board, 24-pin CPU power, 4-pin 1st Hard drive 1st Optical drive 2nd hard drive 2nd Optical drive Cable Designator P1 P2 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 141
: The 3.5-inch external drive bay can also be configured with a secondary internal hard drive covered by a bezel blank. To verify the type, size, and capacity of the storage devices installed in the computer, run Computer Setup. Refer to the Computer Setup (F10) Utility Guide for more information - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 142
HP-supplied standard screws are silver. If you are replacing the primary hard drive, you must remove the four silver and blue 6-32 isolation mounting guide screws from the old hard drive and install them in the new hard drive. 130 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 143
not drop it. Do not use excessive force when inserting a drive. Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic fields such as monitors or speakers. If a drive must be mailed, place the drive in a bubble-pack mailer or other protective packaging and label - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 144
No. System Board Connector 1 Diskette Drive 2 Media Card Reader 3 SATA0 4 SATA1 5 SATA2 6 SATA3 System Board Label FLPY MEDIA SATA0 SATA1 SATA2 SATA3 Color black black dark blue white light blue orange 132 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 145
removing the drive from the computer. To remove an optical drive: 1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Rotate the drive cage to its upright position. 4. Disconnect the power cable (1) and - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 146
Panel on page 114). 3. If you are installing a drive in a bay covered by a bezel blank, remove the front bezel then remove the bezel blank. See Front Bezel on page 115 and Bezel Blanks on page 116 for more information. 134 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 147
the internal components of the drive. NOTE: When replacing the drive, transfer the four M3 metric guide screws from the old drive to the new one. 5. Position the guide screws on the drive into the J-slots in the drive bay. Then slide the drive toward the front of the computer until it locks into - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 148
frame under the drive cage. Ensure that the data cable is routed through these guides before connecting it to the optical drive. 9. Connect the power cable (1) and data cable (2) to the rear of the optical drive. 136 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 149
media should be taken out of a drive before removing the drive from the computer. NOTE: The 3.5-inch drive bay may contain a diskette drive or a media card reader. The 3.5-inch drive is located underneath the optical drive. You must remove the optical drive before removing the external 3.5-inch - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 150
: a. If you are removing a diskette drive, disconnect the data cable (1) and power cable (2) from the back of the drive. b. If you are removing a media card reader, disconnect the USB cable from the system board. 138 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 151
be an empty drive bay. If the computer was not configured with a 3.5-inch drive, you can install a media card reader, diskette drive, or hard drive into the drive bay. The 3.5-inch bay is located underneath the optical drive. To install a drive into the 3.5-inch bay: NOTE: Install guide screws to - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 152
media card reader to the USB connector on the system board labeled MEDIA. NOTE: Refer to System Board Drive Connections on page 132 for an illustration of the system board drive connectors. 5. Replace the optical drive. 140 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 153
, software drivers, and any software applications that were preinstalled on the computer. If you do not have this CD set, select Start > HP Backup and Recovery and create it now. The preinstalled 3.5-inch hard drive is located under the power supply. To remove and replace the hard drive: 1. Prepare - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 154
4. Rotate the power supply to its upright position. The hard drive is located beneath the power supply. 5. Disconnect the power cable (1) and data cable (2) from the back of the hard drive. 142 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 155
next to the hard drive (1). While holding the latch down, slide the drive forward until it stops, then lift the drive up and out of the bay (2). 7. To install a hard drive, you must transfer the silver and blue isolation mounting guide screws from the old hard drive to the new hard drive. Drives 143 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 156
power supply down to their normal positions. NOTE: If you are replacing the primary hard drive, use the Recovery Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. 144 Chapter 8 Removal and Replacement Procedures Small - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 157
Disc Set to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. If you do not have this CD set, select Start > HP Backup and Recovery and create it now. 1. Unlock the hard drive carrier with the key provided and slide the carrier - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 158
4. Remove the four screws from the bottom of the hard drive carrier. 5. Slide the hard drive back to disconnect it from the carrier then lift it up and out of the carrier. 146 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 159
6. Place the new hard drive in the carrier then slide the hard drive back so that it seats in the SATA connector on the carrier's circuit board. Be sure the connector on the hard drive is pressed all the way into the connector on the carrier's circuit board. 7. Replace the four screws in the bottom - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 160
to secure the cover in place (2). 10. Slide the hard drive carrier into the enclosure on the computer and lock it with the key provided. NOTE: The carrier must be locked for power to be supplied to the hard drive. 148 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 161
Cable Routing When servicing the computer, please note the original locations of the cables and how they are routed in the chassis. There are two white plastic cable clamps in the chassis located under the drive cage - one attached directly to the drive cage, the other attached to the chassis base. - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 162
access panel (Computer Access Panel on page 114). 3. Unplug the ReadyBoost cable from the system board, and then lift the card assembly from the chassis. To install the ReadyBoost card, reverse the removal procedure. 150 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 163
for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Lift the inner baffle straight up out of the chassis. To install the inner baffle, reverse the removal procedure. When - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 164
(Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on page 114). 3. Remove the front bezel (Front removal procedure. Be careful of the power switch wires when reinstalling. 152 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 165
the assembly from the chassis. To install the power switch assembly, reverse the removal procedure. When installing the power switch, replace the LEDs first. You may need to first insert one clip and the power button, then use a small flat-blade screwdriver to help guide the other clip into its slot - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 166
I/O device, reverse the removal procedure. When reinstalling the front I/O device, be sure to guide the cables through the opening in the drive cage directly behind the front I/O device slot in the front of the chassis. 154 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF) Chassis - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 167
1. Prepare the computer for disassembly (Preparation for Disassembly on page 108). 2. Remove the access panel (Computer Access Panel on forces on the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing the system board - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 168
(Computer Place the processor in its socket and close the retainer. 2. supplied in the spares kit. 4. Apply the thermal grease provided in the spares kit to the top of the processor and install the heatsink atop the processor. 156 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 169
important as the pins on the socket are very fragile and any damage BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://h18000.www1.hp.com/support/files. Speaker 1. Prepare the computer the chassis while guiding the wire through the hole in the drive cage. To - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 170
the power supply brackets. 3. Push the power supply all the way down, and then press toward the rear of the unit until it snaps into place. The top of a properly installed power supply will set flush with the top of the chassis. 158 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 171
Computer Access Panel on page 114). 3. Remove all PCI and PCI Express expansion boards (Expansion Cards on page 123). 4. Remove the fan shroud from the chassis (Inner Baffle on page 151). 5. Rotate the drive cage to its upright position. 6. Rotate the power supply serial number in the BIOS. NOTE - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 172
card to gain access to the battery. 3. Locate the battery and battery holder on the system board. 4. Depending on the type of battery holder on your system board, complete the following instructions to replace the battery: 160 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 173
the proper position. 4. Replace the computer access panel. 5. Plug in the computer and turn on power to the computer. 6. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. Type 2 Battery Holder 1. To release - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 174
computer access panel. 4. Plug in the computer and turn on power to the computer. 5. Reset the date and time, your passwords, and any special system setups, using Computer Setup. Refer to the Computer Setup (F10) Utility Guide. 162 Chapter 8 Removal and Replacement Procedures Small Form Factor (SFF - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 175
A Connector Pin Assignments This appendix contains the pin assignments for many computer and workstation connectors. Some of these connectors may not be used on the product being serviced. Keyboard Connector and Icon Pin Signal 1 Data 2 Unused 3 Ground 4 +5 VDC 5 Clock 6 Unused - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 176
Data 4 Data Terminal Ready 5 Signal Ground 6 Data Set Ready 7 Request to Send 8 Clear to Send 9 Ring Indicator (5V if powered) USB Connector and Icon Pin Signal 1 +5 VDC 2 - Data 3 + Data 4 Ground Microphone Connector and Icon (1/8" miniphone) 1 23 Pin 1 (Tip) 2 (Ring - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 177
Icon (1/8" miniphone) 1 23 Line-in Audio Connector and Icon (1/8" miniphone) 1 23 Line-out Audio Connector and Icon (1/8" miniphone) 1 23 Signal Audio_Out_Left Audio_Out_Right Ground Pin Signal 1 Transmit 2 Receive 3 Ground 4 5V 5 Mode 6 Not Used 7 Not Used 8 Not Used Headphone 165 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 178
Monitor Connector and Icon Pin Signal 1 Red Analog 2 Green Analog 3 Blue Analog 4 Not used 5 Ground 6 Ground 7 Ground 8 Ground Pin Signal 9 +5V (fused) 10 Ground 11 Not used 12 DDC Serial Data 13 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 179
ATA/ATAPI (IDE) Standard Drive Cable Connector Pin Signal 1 Reset 2 Ground 3 DD7 4 DD8 5 DD6 PDIAG (cable detect) 35 DA0 36 DA2 37 CS1FX 38 CS3FX 39 DASP 40 Ground 24-Pin Power (CMT and MT models) Connector 24 12 Pin Signal 1 +3.3V 2 +3.3V 3 GND 4 +5V 5 GND - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 180
Signal 19 GND 20 +3.3V 21 Sense 22 +3.3V 23 +3.3V 24 GND -12V 4-Pin Power (for CPU) (MT and CMT models) Connector and Icon Pin Signal 1 GND 2 GND 3 +12V CPU 4 -12V CPU 6-Pin Power (for CPU) (USDT, SFF, and ST models) Connector and Icon 4 6 Pin Signal 1 GND 2 GND 3 GND 4 12V - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 181
SATA Data and Power Drive Connector Pin Signal S1 Ground S5 BP1 Ground P5 BP9 V 5 P13 V 12 *S = Data, P = Power Pin Signal S2 A+ S6 B+ P2 V 3.3 P6 Ground P10 Ground P14 V12 PCI Express x1, x4, x8, and x16 PCI 24 GND 25 PERp2 46 GND 47 PERp7 48 PERn7 49 GND 50 RSVD 71 GND SATA Data and Power 169 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 182
52 PERp8 57 PERn9 53 PERN8 58 GND 54 GND 59 GND 55 GND 60 PERp10 76 PERp14 81 PERn15 77 PERn14 82 GND 78 GND 79 GND 80 PERp15 Pin B information is on the next page NOTE: x1 PCI Express uses pins 1-18 x4 PCI Express uses pins 1-32 x8 PCI Express uses pins 1-49 x16 PCI Express uses - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 183
DDC Data 8 No Connect 9 T.M.D.S. Data1- 10 T.M.D.S. Data1+ 11 T.M.D.S. Data1/3 Shield 12 T.M.D.S. Data3- Pin Signal 13 T.M.D.S. Data3+ 14 +5V Power 15 Ground (for +5V) 16 Hot Pug Detect 17 T.M.D.S. Data0- 18 T.M.D.S. Data0+ 19 T.M.D.S. Data0/5 Shield 20 T.M.D.S. Data5- 21 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 184
B Power Cord Set Requirements The power supplies on some computers have external power switches. The voltage select switch feature on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. Power supplies on those computers that do not have external power - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 185
must be Type HO5VV-F, 3-conductor, 0.75mm2 conductor size. Power cord set fittings (appliance coupler and wall plug) must bear Appliance coupler, flexible cord, and wall plug must bear a "T" mark and registration number in accordance with the Japanese Dentori Law. Flexible cord must be Type VCT or - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 186
lists the error codes, error messages, and the various indicator light and audible sequences that you may encounter during Power-On Self-Test (POST) or computer restart, the probable source of the problem, and steps you can take to resolve the error condition. POST Message Disabled suppresses - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 187
, remove it to see if the problem remains. 2. In Computer Setup, set Advanced > Device Options > NIC PXE Option ROM Download to DISABLE to prevent PXE option ROM for the internal NIC from being downloaded during POST to free more memory for an expansion card's option ROM. Internal PXE option ROM - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 188
Error Memory configuration incorrect. 1. Run Computer Setup or Windows utilities. 2. Make sure the memory module(s) are installed properly. 3. If third-party memory has been added, test using HP-only memory. 4. Verify proper memory module type. 201-Memory Error RAM failure. 1. Run Computer - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 189
. 1. Reseat the graphics card (if applicable). 2. Clear CMOS. 3. Verify monitor is attached and turned on. 4. Replace the graphics card (if possible). 510-Flash Screen Image Corrupted Flash Screen image has errors. Reflash the system ROM with the latest BIOS image. 511-CPU, CPUA, or CPUB - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 190
1. Upgrade BIOS to proper version. 2. Change the processor. Invalid Electronic Serial Number Electronic serial number is missing. Enter the correct serial number in Computer Setup. Memory Parity Error Parity RAM failure. Run Computer Setup and Diagnostic utilities. Third-party graphics card - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 191
seconds. None None Red Power LED flashes two 2 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Computer on. None Computer in Suspend to RAM mode (some models only) or normal Suspend mode. None required. Press - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 192
memory with HP memory. 4. Replace the system board. Red Power LED flashes six 6 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Pre-video graphics error. For systems with a graphics card: 1. Reseat the graphics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 193
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. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 181 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 194
Run the Drive Protection System (DPS) Self-Test in Computer Setup. Refer to the Computer Setup (F10) Utility Guide for more information. ● Check the Power LED on the front of the computer to see if it is flashing red. The flashing lights are error codes that will help you diagnose the problem. Refer - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 195
on and the green power light is on. ● Check to see that the monitor is turned on and the green monitor light is on. ● Check the Power LED on the front of the computer to see if it is flashing red. The flashing lights are error codes that will help you diagnose the problem. Refer to Appendix A, POST - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 196
not restart, press the power button to start the computer. ● Reconfigure the computer after installing a non-plug and play expansion board or other option. See Solving Hardware Installation Problems on page 207 for instructions. ● Be sure that all the needed device drivers have been installed. For - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 197
prolongs the life of the RTC battery. First, reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Hardware Reference Guide for instructions on installing a new battery, or contact an - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 198
did not release reserved memory back to the system. Virus resident on the hard drive. Too many applications running. Solution 1. Make sure airflow to the computer is not blocked. Leave a 10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit the required - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 199
in the application. 2. Add more memory. 3. Upgrade the graphics solution. Cause unknown. Restart the computer. Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. (Beeps stop after fifth - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 200
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. 5. If the 5V_aux light on the system board is off, then replace the power supply. 6. Replace the system board. 188 Appendix D Troubleshooting Without Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 201
on because of internal power supply Contact an authorized service provider to replace the power fault. supply. Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. (Beeps stop after fifth - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 202
the computer when you add or remove hardware, such as an additional diskette drive. See Solving Hardware Installation Problems on page 207 for instructions. Table D-3 Solving Diskette Problems Diskette drive light stays on. Cause Solution Diskette is damaged. In Microsoft Windows XP, right - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 203
the computer has been inserted in the drive. Spacebar. The computer should start up. Diskette error has occurred. Restart the computer by pressing the power button. Cannot Boot to Diskette. Cause Diskette is not bootable. Solution Replace with a bootable diskette. Solving Diskette Problems 191 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 204
Options > Removable Media Boot. NOTE: Both steps should be used as the Removable Media Boot function in Computer Setup overrides the Boot Order enable command. Run Computer Setup and disable Network Server Mode in Security > Password Options. 192 Appendix D Troubleshooting Without Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 205
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 Options. The device is attached to a SATA port that has been disabled Run the Computer Setup - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 206
. Refer to the HP Backup and Recovery Manager User Guide in the Windows Start menu for more information. Hard drive boot has been disabled in Computer Setup. Run the Computer Setup utility and enable the hard drive entry in the Storage > Boot Order list. Bootable hard drive is not attached as - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 207
seated in the carrier. The removable hard drive enclosure is beeping and the green LED is flashing. Cause Solution Fan failure alarm on the removable hard drive enclosure has Shut down the computer and contact HP for a replacement been activated. enclosure. Solving Hard Drive Problems 195 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 208
used to safely eject the card. Solution Open My Computer (Windows XP) or Computer (Windows Vista), right-click on the corresponding drive icon, and select Eject. Then pull the card out of the slot. NOTE: Never remove the card when the green LED is flashing. 196 Appendix D Troubleshooting Without - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 209
Table D-5 Solving Media Card Reader Problems (continued) After installing the media card reader and booting to Windows, the reader and the inserted cards are not recognized by the computer. Cause Solution The operating system needs time to recognize the device if the Wait a few seconds so that - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 210
is running in Boot Block Emergency Recovery Mode (indicated by eight beeps). Reflash the system ROM with the latest BIOS image. See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide for more information You are using a fixed-sync monitor and it will not sync at the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 211
memory with HP memory. 4. Replace the system board. Blank screen and the power LED flashes Red six times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Pre-video graphics error - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 212
Solution Video resolution and refresh rate are set higher than what the Restart the computer and enter Safe Mode. Change the monitor supports. settings to a supported setting then restart the computer so that the new settings take effect. 200 Appendix D Troubleshooting Without Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 213
of standby mode, and when changing resolutions. High pitched noise coming from inside a flat panel monitor. Cause monitor, and download either SP32347 or SP32202: http://www.hp.com/support Graphics card is not seated properly or is bad. 1. Reseat the graphics card. 2. Replace the graphics card - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 214
speakers. Internal speaker is disabled in Computer Setup. Enable the internal speaker in Computer Setup. Select Advanced > Device Options > Internal Speaker. Computer is in standby mode. Press the power button to resume from standby mode. 202 Appendix D Troubleshooting Without Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 215
Table D-7 Solving Audio Problems (continued) Sound does not come out of the speaker or headphones. Cause Solution CAUTION: When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 216
Printer may have failed. Run printer self-test. Printer will not turn on. Cause The cables may not be connected properly. Solution Reconnect all cables and check the power cord and electrical outlet. Printer prints garbled information. Cause The correct printer driver for the application is not - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 217
to the common causes and solutions listed in the following table. Table D-9 Solving Keyboard Problems Keyboard commands and typing are not recognized by the computer. Cause Solution Keyboard connector is not properly connected. 1. On the Windows XP Desktop, click Start > Shut Down. Program in - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 218
the power button to resume from standby mode. CAUTION: When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will a mouse cleaning kit available from most computer stores. 206 Appendix D Troubleshooting Without Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 219
correct memory modules and to verify the proper installation. 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. Solving Hardware Installation Problems 207 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 220
Replace third-party memory with HP memory. 4. Replace the system board. Power LED flashes Red six times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Graphics card is not seated - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 221
for network problems are listed in the following table. These guidelines do not discuss the process of debugging the network cabling. Table D-12 Solving Network Problems Wake-on-LAN feature is not functioning. Cause Solution Wake-on-LAN is not enabled. To enable Wake-on-LAN in Windows XP: NOTE - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 222
is not set up properly. Check for the device status within Windows, such as Device Manager for driver load and the Network Connections applet within Windows for link status. Network controller is disabled. 1. Run Computer Setup and enable network controller. 2. Enable the network controller in - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 223
network drivers, using the Recovery Disc Set created from the hard drive's Recovery Partition. Ensure that the cable is securely attached to the network connector and that the other end of the cable is securely attached to the correct device. Contact an authorized service provider. New network card - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 224
Solving Memory Problems If you encounter memory problems, some common causes and solutions are listed in the following table. CAUTION: Power may still be supplied to the DIMMs when the computer is turned off. To avoid damage to the DIMMs or the system board, you must unplug the computer power cord - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 225
Table D-13 Solving Memory Problems (continued) Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Memory is installed incorrectly or is bad. 1. - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 226
properly. Power LED flashes Red three times, once every second, followed by a two second pause. Cause Solution Processor is not seated properly or not installed. 1. Check to see that the processor is present. 2. Reseat the processor. 214 Appendix D Troubleshooting Without Diagnostics - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 227
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 Options. The device is attached to a SATA port that has been disabled Run the Computer Setup - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 228
DVD with a CD cleaning kit, available from most computer stores. Windows does not detect the CD-ROM or DVD-ROM drive. 1. Use Device Manager to remove or uninstall the device. 2. Restart the computer and let Windows detect the CD or DVD driver. Recording or copying CDs is difficult or impossible - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 229
: Creating a Bootable Device: Supported USB Flash Media Device" section of the Service Reference Guide. The computer boots to DOS after making a bootable Drive Key. Cause Solution Drive Key is bootable. Install the Drive Key only after the operating system boots. Solving Drive Key Problems 217 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 230
listed in the following table. Table D-17 Solving 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. The device does not have power. The correct device driver - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 231
the cable/DSL service is connected, the "cable" LED light on the front of the cable/DSL modem will be on.) The CAT5 UTP cable is disconnected. Connect the CAT5 UTP cable between the cable modem and the computers's RJ-45 connector. (If the connection is good, the "PC" LED light on the front of - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 232
Table D-18 Solving Internet Access Problems (continued) Internet takes too long to download Web sites. Cause Solution Modem is not set up properly. Verify that the modem is connected and communicating properly. Windows XP 1. Select Start > Control Panel. 2. Double-click System. 3. Click the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 233
applicable solutions listed in the following table. Table D-19 Solving Software Problems Computer will not continue and no HP logo screen has appeared. Cause Solution POST error has occurred. Observe the beeps and LED lights on the front of the computer. See Appendix A, POST Error Messages on - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 234
the computer to an authorized reseller, dealer, or service provider for service, remember to provide the setup and power-on passwords if they are set. Refer to the number listed in the warranty or in the Support Telephone Numbers guide for technical assistance. 222 Appendix D Troubleshooting Without - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 235
Battery socket/Battery LED - 5V_Aux (on) Health-LED UID LED Power LED Hard drive activity LED Boot block header/jumper Boot block recovery header ROM recovery header CPLD programming header Clear Password header/jumper Clear CMOS header RJ45 jack Stacked RJ45/Dual USB Quad stacked USB First - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 236
Port and Video Port Parallel port over dual VGA ports DVI connector Keyboard connector, PS/2 (Closest to power supply) Mouse connector, PS/2 Stacked mouse (Top)/keyboard (Bottom) connector Video connector, VGA Primary single USB connector Secondary single USB port Microphone jack Line-in jack Line - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 237
Header for front panel audio P24 Header for front panel USB P25 Internal USB connector 1 P26 Internal USB connector 2 P27 MultiBay header P29 SCSI LED connector P30 PCI extender slot (female) P40 Blade PC graphics connector (outboard) P41 Blade PC graphics connector (inboard) P52 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 238
Serial ATA (SATA) connector VSFF expansion connector Graphics option connector Fifth Serial ATA (SATA) connector ATA (SATA) connector Primary (CPU) fan header for fansink Secondary CPU fan header for fansink Primary fan header Security hood switch on riser card Clear CMOS switch/push button Single - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 239
USB front port power switch First USB rear port power switch Second USB rear port power switch Third USB rear port power switch Battery retainer Memory slot. DIMM1 or RIMM1 populated and tested Following memory slots Primary processor socket Secondary processor socket System ROM and Socket (Socket - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 240
Y4 Y5/H5 Secondary NIC clock crystal RTC clock crystal/tie-down 228 Appendix E System Board and Riser Board Reference Designators - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 241
F Specifications This chapter provides specifications for the microtower and small form factor chassis. Microtower Chassis Desktop Dimensions Height 19.94 in 50.65 cm Width 6.98 in 17.73 cm Depth 16.88 in 42.87 cm Approximate Weight 23.5 lb - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 242
PS 8A @ 100 VAC 4A @ 200 VAC 80 Plus PS 4A @ 100VAC 2A @ 200VAC 1 This system utilizes a passive power factor corrected power supply. The power factor correction is present in the 230V operating mode only. This allows the system to pass the CE mark requirements for use in the countries of the - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 243
Small Form Factor Chassis Desktop Dimensions Height 3.95 in 10.0 cm Width 13.3 in 33.8 cm Depth 14.9 in 37.8 cm Approximate Weight 19 lb 8.6 kg Weight Supported (maximum distributed load in desktop 239 BTU/hr 60 kg-cal/hr Power Supply 115V 230V Operating Voltage Range1 90-264 - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 244
audio problems 202 B battery disposal 59 SFF removal and replacement 160 beep codes 179 bezel blanks SFF removal and replacement 116 BIOS Boot Block Emergency Recovery Mode 33 HPQFlash 32 Remote ROM Flash 32 Boot Block Emergency Recovery Mode 33 bootable device creating 35 DiskOnKey 35, 37 HP Drive - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 245
129 dual-state power button 38 DVI pin assignments 171 E electrostatic discharge (ESD) preventing damage 54 Emergency Recovery Mode, Boot Block 33 entering power-on password 42 setup password 42 error codes 174, 179 messages 175 ethernet RJ-45 pin assignments 163 expansion cards MT removal - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 246
Express card 72, 74, 123, 125 PCI Express pin assignments 169 PCN (Proactive Change Notification) 31 POST error messages 174 power button configuring 38 dual-state 38 power cord set requirements country specific 173 power problems 189 power supply fan 57 MT removal and replacement 102 SFF removal - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 247
219 keyboard 205 Media Card Reader 196 memory 212 monitor 198 mouse 205 network 209 power 189 printer 204 processor 214 software 221 processor MT removal and replacement 98 SFF removal and replacement 156 processor problems 214 product ID location 60 protecting hard drive 48 protecting ROM, caution - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 248
58 updating and management tools 24 spare part number tamper-resistent wrench 58 Torx T-15 screwdriver 58 speaker MT removal and replacement 99 SFF removal and replacement 157 specifications computer 229 memory 119 MT memory 69 static electricity 53 Subscriber's Choice 31 surge-tolerant power supply - HP 5850 | Service Reference Guide: HP Compaq dc5850 Business PC - Page 249
Subscriber's Choice 31 System Software Manager download 26 white papers 29 Index 237
Service Reference Guide
HP Compaq dc5850 Business PC