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Technical Reference Guide www.hp.com 4-13
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 4-8.
.
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.
4.5.4 Thermal 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).
The RPM (speed) of all fans is the result of the temperature of the CPU as sensed by speed
control circuitry. The fans are controlled to run at the slowest (quietest) speed that will maintain
proper cooling.
Table 4-8.
System Operational Status LED Indications
System Status PowerLED Beeps [2] Action Required
S0: System on (normal
operation)
Steady green None None
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 @ I Hz [1] 2 Check air flow, fans, heatsink
Processor not seated / installed Blinks red 3 times @ I Hz [1] 3 Check processor
presence/seating
Power supply overload failure Blinks red 4 times @ I Hz [1] 4 Check system board problem
[3],
Memory error (pre-video) Blinks red 5 times @ I Hz [1] 5 Check DIMMs, system board
Video error Blinks red 6 times @ I Hz [1] 6 Check graphics card or
system board
PCA failure detected by BIOS
(pre-video)
Blinks red 7 times @ I Hz [1] 7 Replace system board
Invalid ROM checksum error Blinks red 8 times @ I Hz [1] 8 Reflash BIOS ROM
Boot failure (after power on) Blinks red 9 times @ I Hz [1] 9 Check power supply,
processor, sys. bd
Bad option card Blinks red 10 times @ I Hz [1] None Replace option card
- Technical Reference Guide 1
- First Edition (October 2007) 2
- Contents 3
- 3 Processor/Memory Subsystem 4
- 4 System Support 4
- 5 Input/Output Interfaces 4
- 8SYSTEM BIOS 6
- A Error Messages and Codes 6
- Introduction 7
- 1.5 Notational Conventions 9
- Table 1-1 10
- Table 1-1 (Continued) 11
- System Overview 17
- 2.2 Features 18
- Table 2-1 19
- 2.3 System Architecture 20
- 2.3.1 Intel Processor Support 22
- 2.3.2 Chipset 23
- 2.3.3 Support Components 24
- 2.3.4 System Memory 24
- 2.3.5 Mass Storage 25
- 2.3.9 Graphics Subsystem 26
- 2.3.10 Audio Subsystem 26
- 2.4 Specifications 27
- Table 2-8 28
- Physical Specifications 28
- Table 2-9 29
- Table 2-10 30
- Optical Drive Specifications 30
- Table 2-11 31
- Hard Drive Specifications 31
- Processor/Memory Subsystem 33
- 3.2 Intel Processors 34
- 3.3 Memory Subsystem 36
- 3.3.1 Memory Upgrading 37
- System Support 39
- Software/Driver Layer 41
- Transaction Protocol Layer 41
- 4.2.3 Option ROM Mapping 42
- 4.2.4 PCI Interrupts 42
- 4.2.6 PCI Connectors 43
- PCI Express Connectors 44
- 4.3 System Resources 45
- 4.3.2 Direct Memory Access 46
- 4.4.1 Clearing CMOS 47
- 4.5 System Management 48
- Power-On / Setup Password 49
- Setup Password 49
- Cable Lock Provision 49
- I/O Interface Security 49
- Chassis Security 49
- 4.5.2 Power Management 50
- 4.5.3 System Status 51
- 4.6.1 System I/O Map 52
- 4.6.2 GPIO Functions 53
- I/O Controller Functions 54
- Input/Output Interfaces 55
- 5.2 SATA Interface 56
- 5.3 PATA Interface 57
- 5.4 Diskette Drive Interface 58
- Table 5-3 59
- 5.5 Serial Interface 60
- 5.6 Parallel Interface 61
- Table 5-5 62
- Table 5-6 64
- 5.8.1 USB Connector 65
- 5.8.2 USB Cable Data 66
- 5.9 Audio Subsystem 67
- 5.9.1 HD Audio Controller 68
- 5.9.2 HD Audio Link Bus 68
- 5.9.3 Audio Multistreaming 68
- 5.9.4 Audio Specifications 69
- 5.10.1 Wake-On-LAN Support 71
- 5.10.4 NIC Connector 72
- 5.10.5 NIC Specifications 72
- Integrated Graphics Subsystem 73
- 6.2 Functional Description 74
- Controller 74
- 6.3 Display Modes 76
- 6.4 Upgrading 77
- 6.5 Monitor Connectors 78
- Table 6-4 79
- Power and Signal Distribution 81
- 7.2.2 SFF Power Distribution 82
- Table 7-2 83
- 7.2.3 CMT Power Distribution 84
- 7.2.4 Energy Star Compliancy 85
- 7.3 Power Con trol 86
- Table 7-5 87
- Power Button Actions 87
- Power LED Condition 87
- 7.3.2 Wake Up Events 88
- 7.3.3 Power Management 89
- 7.4 Signal Distribution 90
- Table 7-7. (Continued) 91
- SYSTEM BIOS 93
- 8.2 ROM Flashing 94
- 8.3 Boot Functions 95
- 8.3.4 Boot Error Codes 96
- Table 8-2 97
- 8.4.1 System ID and ROM Type 98
- 8.4.2 Temperature Status 98
- 8.4.3 Drive Fault Prediction 98
- 8.5 SMBIOS 99
- 8.6 USB Legacy Support 100
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