System Support

4.5.3 System Status

These systems provide a visual indication of system boot, ROM flash, and operational status through the power LED and internal speaker, as described in Table 4-7.

.

Table 4-7.

System Operational Status LED Indications

 

 

 

 

System Status

PowerLED

Beeps [2]

Action Required

S0: System on (normal

Steady green

None

None

operation)

 

 

 

 

 

 

 

S1: Suspend

Blinks green @ .5 Hz

None

None

S3: Suspend to RAM

Blinks green @ .5 Hz

None

None

S4: Suspend to disk

Off – clear

None

None

S5: Soft off

Off – clear

None

None

Processor thermal shutdown

Blinks red 2 times @ 1 Hz [1]

2

Check air flow, fans,

 

 

 

heatsink

 

 

 

 

Processor not seated / installed

Blinks red 3 times @ 1 Hz [1]

3

Check processor

 

 

 

presence/seating

 

 

 

 

Power supply overload failure

Blinks red 4 times @ 1 Hz [1]

4

Check system board problem

 

 

 

[3],

 

 

 

 

Memory error (pre-video)

Blinks red 5 times @ 1 Hz [1]

5

Check DIMMs, system board

Video error

Blinks red 6 times @ 1 Hz [1]

6

Check graphics card or

 

 

 

system board

 

 

 

 

PCA failure detected by BIOS

Blinks red 7 times @ 1 Hz [1]

7

Replace system board

(pre-video)

 

 

 

 

 

 

 

Invalid ROM checksum error

Blinks red 8 times @ 1 Hz [1]

8

Reflash BIOS ROM

Boot failure (after power on)

Blinks red 9 times @ 1 Hz [1]

9

Check power supply,

 

 

 

processor, sys. bd

 

 

 

 

Bad option card

Blinks red 10 times @ 1 Hz [1]

None

Replace option card

NOTES:

Beeps are repeated for 5 cycles, after which only blinking LED indication continues.

[1]Repeated after 2 second pause.

[2]Beeps are produced by the internal chassis speaker.

[3]Check that CPU power connector P3 is plugged in.

4.5.4Thermal Sensing and Cooling

All systems feature a variable-speed fan mounted as part of the processor heatsink assembly. All systems also provide or support an auxiliary chassis fan. All fans are controlled through temperature sensing logic on the system board and/or in the power supply. There are some electrical differences between form factors and between some models, although the overall functionally is the same. Typical cooling conditions include the following:

1.Normal—Low fan speed.

2.Hot processor—ASIC directs Speed Control logic to increase speed of fan(s).

3.Hot power supply—Power supply increases speed of fan(s).

4.Sleep state—Fan(s) turned off. Hot processor or power supply will result in starting fan(s).

 

4-12

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Technical Reference Guide

Page 46
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HP dc5850 manual System Status, Thermal Sensing and Cooling, System Operational Status LED Indications

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.