SYSTEM BIOS

The BIOS performs memory detection and configuration with the following steps:

1.Program the buffer strength control registers based on SPD data and the DIMM slots that are populated.

2.Determine the common CAS latency that can be supported by the DIMMs.

3.Determine the memory size for each DIMM and program the memory controller accordingly.

4.Enable refresh.

8.3.4Boot Error Codes

The BIOS provides visual and audible indications of a failed system boot by using the system’s power LED and the system board speaker. The error conditions are listed in the following table.

Table 8-1

Boot Error Codes

Visual (power LED)

Audible (speaker)

Meaning

 

 

 

Blinks red 2 times @ 1 Hz

2 beeps

Processor thermal shut down. Check air flow, fan

 

 

operation, and CPU heat sink.

 

 

 

Blinks red 3 times @ 1 Hz

3 beeps

Processor not installed. Install or reseat CPU.

 

 

 

Blinks red 4 times @ 1 Hz

None

Power failure (power supply is overloaded). Check

 

 

storage devices, expansion cards and/or system

 

 

board (CPU power connector P3).

 

 

 

Blinks red 5 times @ 1 Hz

5 beeps

Pre-video memory error. Incompatible or

 

 

incorrectly seated DIMM.

 

 

 

Blinks red 6 times @ 1 Hz

6 beeps

Pre-video graphics error. On system with

 

 

integrated graphics, check/replace system board.

 

 

On system with graphics card, check/replace

 

 

graphics card.

 

 

 

Blinks red 7 times @ 1 Hz

7 beeps

PCA failure. Check/replace system board.

 

 

 

Blinks red 8 times @ 1 Hz

8 beeps

Invalid ROM (checksum error). Reflash ROM using

 

 

CD or replace system board.

 

 

 

Blinks red 9 times @ 1 Hz

9 beeps

System powers on but fails to boot. Check power

 

 

supply, CPU, system board.

 

 

 

Blinks red 10 times @ 1 Hz

10 beeps

Bad option card.

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

 

8-4

www.hp.com

Technical Reference Guide

Page 88
Image 88
HP dc5850 manual Boot Error Codes, Visual power LED Audible speaker Meaning

dc5850 specifications

The HP dc5850 is a desktop computer that was designed for business environments, offering a blend of performance, reliability, and efficiency. Released during the height of the mid-2000s, this system is powered by AMD processors, particularly the Athlon or Phenom series, which ensures that it can handle various computational tasks with ease.

The dc5850 features a compact chassis that adheres to the Microtower form factor. This design not only saves space but also allows for easier upgrades and maintenance. The unit typically supports a range of RAM configurations, with options for up to 8GB of DDR2 memory. This flexibility enables the user to tailor the system's performance according to their needs, whether for basic office tasks or more demanding applications.

Storage options on the HP dc5850 include a 3.5-inch HDD that can accommodate substantial data, with capacities typically ranging from 160GB to 1TB. The inclusion of a SATA interface ensures fast data transfer rates, which is essential for improving overall system performance. Moreover, the dc5850 boasts multiple USB ports, including USB 2.0 and sometimes even USB 3.0, facilitating easy connectivity with peripherals such as printers, scanners, and external drives.

Graphics capabilities on the dc5850 are generally provided by integrated solutions, although users have the option to add discrete graphics cards for enhanced performance in visual tasks. The system often comes with integrated audio, which supports basic multimedia needs without requiring additional sound cards.

In terms of connectivity, the HP dc5850 features built-in Ethernet for wired networking and may also offer options for Wi-Fi capabilities via PCI expansion slots. This makes it suitable for networked business environments, enabling seamless integration into office infrastructures.

The system is designed with energy efficiency in mind, complying with various environmental standards, thereby reducing its carbon footprint. This aspect may also lead to lower operational costs for businesses focused on sustainability.

Overall, the HP dc5850 stands out as a versatile desktop solution, catering to the essential needs of small to medium-sized businesses. With its combination of performance, expandability, and energy efficiency, it remains a noteworthy choice for users seeking reliable computing power in a compact and manageable form.