HP dc7800 tower manual Failsafe Boot Block ROM, Password Security, Error Conditions and Messages

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Failsafe Boot Block ROM

The computer comes with a reprogrammable flash system ROM (read only memory). To upgrade the ROM, download the latest ROM BIOS image from the HP Web site (www.hp.com) and follow the online GUI/instructions.

Your system ROM includes a Failsafe Boot Block that is protected during the flash process and allows the computer to be restarted in the unlikely event of an unsuccessful ROM flash.

If the system detects an invalid system ROM during the boot sequence, the Failsafe Boot Block attempts to locate a valid BIOS image on removable media. To recover from the Boot Block recovery mode complete the following steps:

Boot Block Recovery

1.Remove any bootable media from the computer and turn off power.

2.Insert a flash drive or CD containing the ROM BIOS in the root directory. The media must be formatted using the FAT12, FAT16, or FAT32 file system.

3.Turn on power to the system.

4.The system will automatically flash the ROM.

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.

Password Security

Establishing a Setup or Power-On password:

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 title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary.

3.To establish a Setup password, select Security > Setup Password and follow the instructions

on the screen. - or -

To establish a Power-On password, select Security > Power-On Password and follow the instructions on the screen

4.Before exiting, click File > Save Changes and Exit.

Changing a Setup or Power-On password:

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

To change the Setup password, go to step 2.

To change the Power-on password, go to step 3.

2.To change the Setup password, 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 title screen, if necessary.

3.When the key icon appears, type your current password, a slash (/) or alternate delimiter character, your new password, another slash (/) or alternate delimiter character, and your new password again as shown:

current password/new password/new password.

NOTE: Type the new password carefully since the characters do not appear on the screen.

4.Press Enter.

The new password will take effect the next time the computer is restarted.

Deleting a Power-On or Setup password

1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

To delete the Setup password, go to step 2.

To delete the Power-On password, go to step 3.

2.To change the Setup password, 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 title screen, if necessary.

3.When the key icon appears, type your current password followed by a slash (/) or alternate delimiter character as shown. Example: currentpassword/

4.Press Enter.

Security Features

Diagnostic Functions

Diagnostic functions are provided by the Setup Utility (in system ROM) and by HP Insight Diagnostics. HP Insight Diagnostics provides detailed system information including:

•Processor type and speed

•Memory amount, mapping, and integrity

•Hardware peripheral availability/settings

•Hard drive type, space used/available

•System identification, asset tracking

Insight Diagnostics may be found on the Documentation and Diagnostics CD that shipped with the computer. The tool may also be downloaded from the HP Web site using the following pro- cedure:

1.Go to www.hp.com

2.Click the Software & Download driver link.

3.Enter the product number (for example, dc7900) in the text box and press the Enter key.

4.Select the specific product.

5.Select the OS.

6.Click the Diagnostics link.

7.Select HP Insight Diagnostics Offline Edition.

8.Click Download.

NOTE: The download includes instructions on how to create a bootable CD.

Clearing CMOS

1.Turn off the computer and any external devices, and disconnect the power cord from the power outlet.

2.Remove the chassis access panel.

3.On the system board, press and hold the CMOS button for 5 seconds.

4.Replace the chassis access panel and reconnect the power cord.

5.Turn on the computer and allow it to start.

Error Conditions and Messages

 

 

How It Is

Feature

Purpose

Established

 

 

 

Floppy drive controller

Prevents the transfer of data to or from the

Setup Utilities

 

floppy drive.

 

 

 

 

Device Boot Disabling

Prevents booting from and or all of these

Setup Utilities

 

devices: Internal or external USB, Internal

 

 

ODD, or Internal FDD

 

 

 

 

Security Option

Prevents use of computer until password is

Setup Utilities

 

entered. Can apply to both initial startup and

 

 

restart.

 

 

 

 

BIOS Write Protect

Restricts ability to change ROM BIOS with-

Setup Utilities.

 

out approval.

 

 

 

 

USB Controller

Allows you to disable or enable all USB

Setup Utilities

 

devices.

 

 

 

 

Diagnostic LEDs

LED

Color

LED Activity

State/Message

 

 

 

 

Power

Green

On

Computer on

 

 

 

 

Power

Green

1 blink every 2 seconds

Normal Suspend Mode

 

 

 

 

Power

Red

1 blink every second followed

CPU thermal shutdown

 

 

by a 2 second pause

 

 

 

 

 

Power

Red

3 blinks, 1 blink every second

Processor not installed

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

4 blinks, 1 blink every second

Power failure (power supply overload)

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

5 blinks, 1 blink every second

Pre-video memory error

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

6 blinks, 1 blink every second

Pre-video graphics error

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

7 blinks, 1 blink every second

System board failure (ROM

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

8 blinks, 1 blink every second

Invalid ROM based on Checksum

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

9 blinks, 1 blink every second

System powers on but is unable to boot

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

10 blinks, 1 blink every second

Bad option card

 

 

followed by a 2 second pause

 

 

 

 

 

Power

Red

11 blinks, 1 blink every second

The current processor does not support

 

 

followed by a 2 second pause

a feature previously enabled on this

 

 

 

system.

 

 

 

 

none

none

System does not power on and

System unable to power on

 

 

LEDs are not flashing

 

 

 

 

 

Common POST Error Messages

Screen Message

Probable Cause

Recommended Action

 

 

 

 

101-Option ROM Error

1. System ROM checksum

1.

Verify ROM, reflash if required

 

error.

2.

Remove suspected card, reboot

 

 

 

2. Expansion board option

3.

Clear CMOS memory, reboot

 

ROM checksum

 

4.

Replace system board

 

 

 

 

 

 

103-System Board

DMA, timers

1.

Clear CMOS memory.

Failure

 

2.

Remove expansion boards.

 

 

 

 

3.

Replace system board.

 

 

 

 

164-Memory Size Error

Incorrect memory configu-

1.

Run Setup (F10).

and

ration

2.

Check DIMMs for proper

201-Memory Error

 

 

 

seating, type, and HP

 

 

 

 

 

 

compatibility.

 

 

3.

Remove DIMMs singularly and

 

 

 

reboot to isolate faulty DIMM.

 

 

4.

Replace system board.

 

 

 

214-DIMM Configura-

Populated DIMM configura-

Rearrange the DIMMs so that

tion Warning

tion is not optimized

each channel has the same amount

 

 

of memory.

 

 

 

301-, 304-Keyboard error

Keyboard failure.

Check keyboard connection or

 

 

keys. Check connector for bent of

 

 

missing pins. Replace keyboard. If

 

 

304, possible system board prob-

 

 

lem.

 

 

 

 

501-Display Adapter

Graphics display controller.

1.

Reseat graphics card.

Failure

 

2.

Clear CMOS.

 

 

 

 

3.

Check monitor connection.

 

 

4.

Replace graphics card.

 

 

 

 

1720-SMART Hard Drive

Hard drive is about to fail.

1.

Determine if hard drive is

Detects Imminent Failure

 

 

giving correct error message.

 

 

 

Enter Computer Setup and run

 

 

 

the Drive Protection System

 

 

 

test under Storage > DPS Self-

 

 

 

test.

 

 

2.

Apply hard drive firmware

 

 

 

patch if applicable.

 

 

3.

Back up contents and replace

 

 

 

hard drive.

 

 

 

1796-SATA Cabling Error

One or more SATA devices

Ensure SATA connectors are used

 

are improperly attached. For

in ascending order. For one

 

optimal performance, the

device, use SATA 0. For two

 

SATA 0 and SATA 1 con-

devices, use SATA 0 and SATA 1.

 

nectors must be used before

For three devices, use SATA 0,

 

SATA 2 and SATA 3.

SATA1, and SATA 2.

 

 

 

 

1801-Microcode Patch

Processor not supported by

1.

Upgrade BIOS to proper

Error

ROM BIOS.

 

version.

 

 

2.

Change the processor.

 

 

 

 

dc7900 Illustrated Parts & Service Map, CMT Chassis

506593-002

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Contents Key Specifications Spare PartsMiscellaneous Parts Standard and Optional BoardsModem RJ-11 adapters not illustrated System Setup and Boot System BoardFailsafe Boot Block ROM Password SecuritySecurity Features Diagnostic Functions Error Conditions and Messages
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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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