System Board

System Board Connectors and Jumpers (component location may vary)

E49

Password header

P125

Hood sensor connector

 

 

 

 

J9

RJ-45 over dual USB

P126

Flying parallel port header

 

 

 

 

J10

Quad stack USB

P150

Media reader connector

 

 

 

 

J20

PCI slot 1

P151

ReadyBoost connector

 

 

 

 

J21

PCI slot 2

P23

Front audio connector

 

 

 

 

J22

PCI slot 3

P24

Front USB connector

 

 

 

 

J31

PCIe X1

P52

Second serial port

 

 

 

 

J41

PCIe X16, slot 1

P60

SATA0

 

 

 

 

J42

PCIe X16, slot 2

P61

SATA1

 

 

 

 

J64

Display port connector

P62

SATA2

 

 

 

 

J69

VGA connector

P63

SATA3

 

 

 

 

J78

Double stack audio connector

P64

SATA4

 

 

 

 

P1

Main power connector

SW50

Clear CMOS button

 

 

 

 

P3

CPU power connector

XBT1

Real-time-clock battery socket

 

 

 

 

P5

Power button/LED connector

XMM1

DIMM 1

 

 

 

 

P6

Internal speaker connector

XMM2

DIMM 2

 

 

 

 

P9

Front fan connector

XMM3

DIMM 3

 

 

 

 

P10

Diskette drive connector

XMM4

DIMM 4

 

 

 

 

P11

Rear fan connector

XU1

Processor socket

 

 

 

 

P124

Hood lock connector

 

 

 

 

 

 

System Setup and Boot

Basic system information regarding system information, setup, power management, hardware, and passwords is maintained in the Setup Utility held in the system ROM. The Setup Utility is accessed by pressing the F10 key when prompted (on screen) to do so during the boot sequence. If the screen prompt opportunity is missed, a restart will be necessary. For more information about Setup Utilities refer to the Service Reference Guide.

Computer Setup Menu

Heading

Option/Description

 

 

 

 

 

 

File

System Information - Lists the following main system specifications:

 

•

Product name

•

System BIOS

 

 

 

 

•

SKU number (some models)

•

Chassis serial number

 

 

•

Processor type/speed/stepping

•

Asset tracking number

 

 

•

Cache size (L1/L2)

•

ME firmware version

 

 

•

Memory size/speed/channels

•

Management node

 

 

•

Integrated MAC Address

 

 

 

 

 

 

 

 

 

About - Displays copyright notice.

 

 

 

 

 

 

 

Set Time and Date - Allows you to set system time and date.

 

 

 

 

Flash System ROM - Allows you to select a drive containing a new BIOS.

 

 

 

 

Replicated Setup - Save to Rmv Media and Restore from Rmv Media

 

 

 

 

 

 

Default Setup

 

 

 

 

• Save Current Settings as Default

 

 

 

 

• Restore Factory Settings as Default

 

 

 

 

 

 

Apply Defaults and Exit - Applies the selected default settings and clears

 

any established passwords.

 

 

 

 

 

 

 

Ignore Changes and Exit - Exits Computer setup without saving changes.

 

 

 

 

Save Changes and Exit - Saves changes to system configuration or default

 

settings and exits Computer Setup.

 

 

 

 

 

 

Storage

Device Configuration - Lists all installed BIOS-controlled storage devices.

 

The following options are available:

 

 

 

 

• Diskette Type(Legacy Diskettes only)-3.5” 1.44 MB and 5.25” 1.2 MB

 

•

Drive Emulation

 

 

 

 

• Emulation Type - ATAPI Zip drive, hard disk, legacy diskette, CD-ROM

 

 

drive, and ATAPI LS-120 drive

 

 

 

 

•

Multisector Transfers

 

 

 

 

•

Translation Mode

 

 

 

 

•

Translation Parameters

 

 

 

 

•

SATA Default Values

 

 

 

 

 

 

 

 

 

Storage Options

 

 

 

 

•

Removable Media Boot

 

 

 

 

•

Legacy Diskette Write

 

 

 

 

•

SATA Emulation

 

 

 

 

•

Max eSATA Speed

 

 

 

 

 

 

 

DPS Self-Test - Allows you to execute self-tests on ATA hard drives.

 

 

 

 

Boot Order - Allows you to specify boot order.

 

• Shortcut to Temporarily Override Boot Order

 

 

 

 

 

 

Computer Setup Menu (Continued)

Heading

Option / Description

 

 

Security

Setup Password - Allows you to set and enable the setup (Administrator)

 

password.

 

 

 

Power-On Password - Allows you to set and enable power-on password.

 

 

 

Password Options - When any password exists allows you to lock legacy

 

resources, enable/disable network server mode, specify password require-

 

ment for warm boot, and allows you to enable/disable Setup Browse Mode.

 

 

 

Smart Cover (some models) - Allows you to lock/unlock cover lock and set

 

status of cover removal sensor.

 

 

 

Device Security (some models) - Enables/disables all I/O ports, audio, net-

 

work controllers, SMBus controller, and embedded security devices.

 

 

 

USB Security - Allows you to set Device Available/Device Hidden for front

 

USB ports 3-6, rear USB ports 7-12, internal USB ports 1-2.

 

 

 

Network Service Boot - Enables/disables boot from OS on a server.

 

 

 

System IDs - Allows you to set Asset tag, ownership tag, Chassis serial

 

number, UUID, and keyboard locale setting.

 

 

 

DriveLock Security - Allows you to assign/modify a hard drive password for

 

added security.

 

 

 

System Security (some models) - Allows you to enable/disable:

 

•

Data Execution Prevention

 

•

Virtualization Technology

 

• Virtualization Technology Directed I/O

 

•

Trusted Execution Technology

 

• Embedded Security Device Support

 

• OS management of Embedded Security Device through OS

 

• Smart Card BIOS Password Support

 

• PAVP (Protect Audio Video Path) (some models)

 

 

 

Setup Security Level - Provides method to allow users limited access to

 

change specified setup options without knowing Setup password.

 

 

Power

OS Power Management - Allows you to enable/disable Runtime Power

 

Management, Idle Power Savings, ACPI S3 Hard Disk Reset, ACPI S3 PS2

 

Mouse Wakeup, USB Wake on Device Insertion (some models), Unique

 

Sleep State Blink Rates.

 

 

 

Hardware Power Management - Allows you to enable/disable SATA bus

 

power management.

 

 

 

Thermal - Allows you to control minimum permitted fan idle speed.

 

 

Advanced

Power-On Options - Allows you to set:

 

• POST mode - QuickBoot, FullBoot, or FullBoot every 1-30 days.

 

•

POST messages - Enable/disable

 

• MEBx Setup prompt - Enable/disable or hidden/displayed

 

•

F9 prompt - Enable/disable

 

•

F10 prompt - Enable/disable

 

•

F12 prompt - Enable/disable

 

• Factory Recovery Boot Support - Enable/disable

 

• Option ROM prompt - Enable/disable

 

• WOL After Power Loss - Enable/disable

 

• Remote wakeup boot source - Remote server/local hard drive

 

• After Power Loss - Off/on/previous state

 

• POST delay - None, 5, 10, 15, or 20 seconds

 

• Limit CPUID Maximum value to 3

 

 

 

Execute Memory Test (some models) -Restarts computer and executes

 

POST memory test.

 

 

 

BIOS Power-On - Allows you to set the computer to turn on at a preset time.

 

 

 

Onboard Devices - Allows you to set resources or disable onboard system

 

devices.

 

 

 

PCI Devices - Lists installed PCI devices with their IRQ settings and allows

 

you to reconfigure IRQ or disable devices.

 

 

 

PCI VGA Configuration - Allows you to specify which VGA controller will

 

be used when multiple video adapters are available.

 

 

 

Bus Options (some models) - Allows you to enable/disable PCI SERR#

 

Generation and PCI VGA palette snooping.

Device Options - Allows you to set:

•Printer Mode - Bi-Directional, EPP & ECP, Output Only

•Num Lock state at power-on - off/on

•S5 Wake on LAN - enable/disable

•Processor cache - enable/disable

•Integrated video - enable/disable

•Multi-Processor - enable/disable

•Internal speaker - enable/disable

•Monitor Tracking - enable/disable

•NIC PXE Option ROM Download - enable/disable

Management Devices - Only displayed in Advanced menu when BIOS detects multiple management options.

Management Operations - Allows you to set:

•MEBx Setup Prompt - enable/disable

•Remote Help Prompt - enable/disable

•Remote Help Lockout - enable/disable

•Remote Help Connection Timeout - 5, 10, 15, 20, 30, 40, 50, 60, 120, 180, 240 seconds

•SOL Character Echo - enable/disable

•SOL Terminal Emulation Mode - enable/disable

•SOL Keyboard (enable/disable

System Hardware Interrupts

IRQ

System Function

IRQ

System Function

 

 

 

 

0

Timer Interrupt

8

Real-Time Clock

 

 

 

 

1

Keyboard

9

Unused

 

 

 

 

2

Interrupt Controller Cascade

10

Unused, available for PCI

 

 

 

 

3

Serial Port (COM B)

11

Unused, available for PCI

 

 

 

 

4

Serial Port (COM A)

12

Mouse

 

 

 

 

5

Unused, available for PCI

13

Coprocessor

 

 

 

 

6

Diskette Drive

14

Primary ATA (IDE) Controller

 

 

 

 

7

Parallel Port (LPT 1)

15

Secondary ATA (IDE) Controller

 

 

 

 

dc7900 Illustrated Parts & Service Map, CMT Chassis

506593-002

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HP dc7800 tower manual System Board, System Setup and Boot
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dc7800 tower specifications

The HP dc7800 Tower is a powerful desktop computer designed for professional and enterprise environments. Known for its stability, performance, and versatility, this model has secured its place in a variety of business settings. Launched in the mid-2000s, it embodies HP’s commitment to quality and innovation.

One of the main features of the HP dc7800 is its form factor. The tower configuration allows for easy upgrades and maintenance, providing ample space for additional hard drives, memory, and other components. This level of accessibility makes it ideal for businesses that need to adapt their systems to changing requirements.

The dc7800 is powered by Intel's Core 2 Duo processors, offering dual-core technology that enhances multitasking capabilities. With clock speeds ranging from 1.8 GHz to 3.0 GHz, this system can handle demanding applications with relative ease. It also supports Intel's vPro technology, which allows for remote management and security features, making it an excellent choice for organizations prioritizing IT control.

Another notable characteristic is the support for up to 8GB of DDR2 RAM. This allows for efficient data processing and improved performance when running multiple applications simultaneously. Additionally, the dc7800 features multiple storage options, accommodating both SATA hard drives and solid-state drives, which can significantly enhance boot times and overall system responsiveness.

Connectivity options on the HP dc7800 are robust. It includes a variety of USB ports, audio jacks, and optional legacy ports, ensuring compatibility with a wide range of peripherals and accessories. Networking capabilities are also prominent, with built-in Gigabit Ethernet providing high-speed internet access.

Furthermore, the desktop tower is designed with energy efficiency in mind. It meets ENERGY STAR certification standards, which not only helps reduce operational costs but also minimizes environmental impact.

Overall, the HP dc7800 Tower embodies a blend of performance, expandability, and energy efficiency, making it a reliable choice for businesses in need of a robust desktop solution. With its legacy of dependability and its suite of modern technologies, it continues to serve as a valuable asset in enterprise environments.
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