A

Error Messages and Codes

A.1 Introduction

This appendix lists the error codes and a brief description of the probable cause of the error.

Errors listed in this appendix are applicable only for systems running HP/Compaq BIOS. Not all errors listed in this appendix may be applicable to a particular system model and/or configuration.

A.2 Beep/Power LED Codes

Beep and Power LED indictions listed in Table A-1 apply only to HP-branded models.

Table A-1.

Beep/Power LED Codes

Beeps

Power LED

Probable Cause

 

 

 

2 beeps

Blinks red 2 times @ 1 Hz

Processor thermal shut down. Check air flow, fan operation,

 

 

and CPU heatsink

 

 

 

3 beeps

Blinks red 3 times @ 1 Hz

Processor not installed. Install or reseat CPU.

 

 

 

4 beeps

Blinks red 4 times @ 1 Hz

Power failure (power supply is overloaded). Check storage

 

 

devices, expansion cards and/or system board (CPU power

 

 

connector P3).

 

 

 

5 beeps

Blinks red 5 times @ 1 Hz

Pre-video memory error. Incompatible or incorrectly seated

 

 

DIMM.

 

 

 

6 beeps

Blinks red 6 times @ 1 Hz

Pre-video graphics error. On system with integrated graphics,

 

 

check/replace system board. On system with graphics card,

 

 

check/replace graphics card.

 

 

 

7 beeps

Blinks red 7 times @ 1 Hz

PCA failure. Check/replace system board.

 

 

 

8 beeps

Blinks red 8 times @ 1 Hz

Invalid ROM (checksum error). Reflash ROM using CD or

 

 

replace system board.

 

 

 

9 beeps

Blinks red 9 times @ 1 Hz

System powers on but fails to boot. Check power supply, CPU,

 

 

system board.

 

 

 

10 beeps

Blinks red 10 times @ 1 Hz

Bad option card.

NOTE: Audible indications occur only for the first five cycles of the error indication. Visual indications occur indefinitely until power is removed or until error is corrected.

 

Technical Reference Guide

www.hp.com

A-1

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HP dc7800 tower manual Error Messages and Codes, Table A-1 Beep/Power LED Codes, Beeps Power LED Probable Cause

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.