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Question posted by algherawi on February 16th, 2012

Power-on Password

i cant bootup my pc Compaq dc7900 becase of power-on password is shown up in first screen .help me

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Related Compaq dc7900 Manual Pages

Testing on HP Business Desktop PCs - Page 4

... associated hardware components. 4 Testing includes: • Signal Integrity Testing-This helps ensure proper signal quality on Business Desktop PCs to help ensure that what gets built in place to help ensure platform component stability prior to incorporation into an integrated desktop solution. Additionally, power cycle testing is comprehensive validation and qualification of the system...

Hardware Reference Guide - dc7900 Series Convertible Minitower - Page 2

Nothing herein should be photocopied, reproduced, or translated to change without the prior written consent of Hewlett-Packard Company. Hardware Reference Guide HP Compaq Business PC dc7900 Series Convertible Minitower First Edition (July 2008) Document part number: 490843-001 The only warranties for technical or editorial errors or omissions contained herein. No part of Microsoft ...

Hardware Reference Guide - dc7900 Series Convertible Minitower - Page 7

...some computer models only). For more information, see Changing from a Minitower to a desktop. Figure 1-1 Convertible Minitower Configuration ENWW Standard Configuration Features 1 For a complete listing of the hardware and software installed in the Troubleshooting Guide. NOTE: The HP Compaq Convertible Minitower computer can be easily converted to a Desktop Configuration on the model.

Illustrated Parts & Service Map: HP Compaq dc7900 Convertible Minitower Business PC - Page 1

... -031 System Unit 1 Access panel 2 Chassis 3 5.25-inch bezel blank 4 Power supply, 365W, 85% efficient 4 Power supply, 365W 5 Front bezel * Not shown dc7900 Illustrated Parts & Service Map, CMT Chassis 450713-001 not spared 335937-001 462434-001...2009. Illustrated Parts & Service Map HP Compaq dc7900 Convertible Minitower Business PC © 2008, 2009 Hewlett-Packard Development Company, L.P. S.

Service Reference Guide: HP Compaq dc7900 Business PC - Page 7

... Drive Cables ...52 SATA Data Cable ...52 SATA Power Cable ...52 PATA Device Information ...53 ATA SMART Drives ...53 Hard Drive Capacities ...53 6 Identifying the Chassis, Routine Care, and Disassembly Preparation Chassis Designations ...54 Convertible Minitower (CMT 54 Small Form Factor (SFF 55 Ultra-Slim Desktop (USDT 55 Electrostatic Discharge Information ...56 Generating Static...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 66

... chapter is always applied to prevent system board or component damage. Chassis Designations Convertible Minitower (CMT) Figure 6-1 Convertible Minitower chassis 54 Chapter 6 Identifying the Chassis, Routine Care, and Disassembly Preparation CAUTION: When the computer is plugged into an AC power source, voltage is essential for the computer. 6 Identifying the Chassis, Routine Care, and...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 75

...on page 54 for initial safety procedures. 1. Preparation for proper service. Disconnect the power cord from the electrical outlet and then from the computer. 5. Keep all peripheral device.... 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Adherence to the procedures and precautions described in this guide are of the power-on state, voltage is always present...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 76

... bit key. ● Refer to the Desktop Management Guide. Order PN 166527-001 for ... Smart Cover Lock and cannot enter your password to disable the lock, you need ...Convertible Minitower (CMT) Chassis This lock prevents unauthorized access to open the access panel with the Smart Cover Lock in any of the following circumstances: ● Power outage ● Startup failure ● PC...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 80

Fasten the security cable by looping it around a stationary object. Figure 7-5 Threading the Keyboard and Mouse Cables 68 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Thread the keyboard and mouse cables through the lock. Figure 7-4 Securing the Cable to a Fixed Object 2. HP Business PC Security Lock 1.

Service Reference Guide: HP Compaq dc7900 Business PC - Page 84

... pull the subpanel, with the bezel blanks secured in it, away from the Subpanel (Desktop Shown) NOTE: When replacing the subpanel, ensure that align it away from the front bezel....at the bottom of the subpanel when properly oriented. 72 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Remove the computer access panel (Computer Access Panel on page 71). 4. Remove...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 86

... Flying parallel port header ReadyBoost module Power Supply Cable Connections Power Supply Connector ID P1 P3 P4 P5 P9 P10 P11 Description Main power CPU power 1st Hard drive, SATA0 2nd HDD 1st ODD or 2nd HDD if no ODD present, SATA1 2nd ODD 3rd ODD 74 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis

Service Reference Guide: HP Compaq dc7900 Business PC - Page 90

... NOTE: A memory module can be installed in the closed position (3). 6. A DIMM must occupy the black DIMM1 socket. Reconnect the power cord and turn on the computer. 78 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Replace the computer access panel. 8. Lock any additional modules. 7. Open both latches of the memory module socket...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 96

... and label the package "Fragile: Handle With Care." 84 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Before handling a drive, ensure that have magnetic fields such as monitors or ...drive, shut down the operating system properly, turn off the computer, and unplug the power cord. Figure 7-21 Extra Optical Drive M3 Guide Screws Location CAUTION: To prevent loss...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 98

...other device that is no more information. 86 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis The bottom 5.25-inch drive bay has a shorter depth ...Desktop and Minitower Drive Positions Table 7-4 Drive Positions 1 Three 5.25-inch external drive bays for optional drives (optical drives shown)1 2 One 3.5-inch external drive bay for optional drives (diskette drive shown...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 104

... page 85 for instructions on using Computer Setup. 92 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Refer to remove the strap that bundles the extra power connectors. 6. Figure 7-32 Connecting the Drive Cables (Optical Drive shown) 7. Connect the power cable (1) and data cable (2) to the 1394 PCI card. If the media card reader...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 106

... (1) and data cable (2) to the next available (unpopulated) SATA connector on using Computer Setup. 94 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Figure 7-35 Connecting the Power Cable and Data Cable to the Computer Setup (F10) Utility Guide for instructions on the system board in the bay. Reconfigure the computer, if...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 112

...reverse the removal procedure. 100 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Disconnect the three cables (front USB, power button LED, and front audio) from the computer. Remove ... through the holes on page 63). 2. Figure 7-44 Removing the front I /O, USB, Power Switch Assembly 1. Remove the front bezel (Front Bezel on page 70). 3. Prepare the computer...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 120

... lever 6. Figure 7-52 Removing the power supply, screw locations 5. Slide the power supply toward the front of the power supply that connect the power supply to the chassis. To install the power supply, reverse the removal procedure. 108 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis Disconnect all power cables from the mass storage devices and...

Service Reference Guide: HP Compaq dc7900 Business PC - Page 126

...it is perpendicular to force a larger drive, such as described in the Desktop Configuration 7. Reconnect all power and data cables to the drive. 8. CAUTION: Hold the subpanel straight ...an optical drive, into place. Repeat this step for the desktop configuration. 114 Chapter 7 Removal and Replacement Procedures Convertible Minitower (CMT) Chassis This could damage the pins that is ...

Using eSATA on HP Compaq dc7900 Business PCs - Page 2

... interfaces. Figure 1 Bandwidth comparison for internal mass storage devices in HP Compaq Business PCs in the market. This high performance interface has proven to eSATA (External Serial Advanced Technology Attachment) technology. Both the HP Compaq dc7900 Business PC Small Form Factor (SFF) and Convertible Minitower (CMT) form factors have full eSATA support. Introduction HP introduced SATA...