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HP Dc7700 HP Compaq dx7300 and dc7700 Business PC Technical Reference Guide, 1 - Page 125

Power LED Indications, Wake Up Events, Power LED, Condition

UPC - 882780715318

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Power and Signal Distribution Power LED Indications A dual-color LED located on the front panel (bezel) is used to indicate system power status. The front panel (bezel) power LED provides a visual indication of key system conditions listed as follows: Power LED Steady green Blinks green @ 0.5 Hz Blinks red 2 times @ 1 Hz [1] Blinks red 3 times @ 1 Hz [1] Blinks red 4 times @ 1 Hz [1] Blinks red 5 times @ 1 Hz [1] Blinks red 6 times @ 1 Hz [1] Blinks red 7 times @ 1 Hz [1] Blinks red 8 times @ 1 Hz [1] Blinks red 9 times @ 1 Hz [1] Blinks red 10 times @ 1 Hz [1] No light Condition Normal full-on operation Suspend state (S1) or suspend to RAM (S3) Processor thermal shut down. Check air flow, fan operation, and CPU heat sink. Processor not installed. Install or reseat CPU. Power failure (power supply is overloaded). Check storage devices, expansion cards and/or system board (CPU power connector P3). Pre-video memory error. Incompatible or incorrectly seated DIMM. Pre-video graphics error. On system with integrated graphics, check/replace system board. On system with graphics card, check/replace graphics card. PCA failure. Check/replace system board. Invalid ROM (checksum error). Reflash ROM using CD or replace system board. System powers on but fails to boot. Check power supply, CPU, system board. Bad option card. System dead. Press and hold power button for less than 4 seconds. If HD LED turns green then check voltage select switch setting or expansion cards. If no LED light then check power button/power supply cables to system board or system board. NOTE: [1] Will be accompanied by the same number of beeps, with 2-second pause between cycles. Beeps stop after 5 cycles. Wake Up Events The PS On signal can be activated with a power "wake-up" of the system due to the occurrence of a magic packet, serial port ring, or PCI power management event (PME). These events can be individually enabled through the Setup utility to wake up the system from a sleep (low power) state. ✎ Wake-up functionality requires that certain circuits receive auxiliary power while the system is turned off. The system unit must be plugged into a live AC outlet for wake up events to function. Using an AC power strip to control system unit power will disable wake-up event functionality. Technical Reference Guide www.hp.com 7-5

Section	Page
Title	1
Contents	3
Chap_1_Introduction_final_review.pdf	7
Introduction	7
1.1 About this Guide	7
1.1.1 Online Viewing	7
1.1.2 Hardcopy	7
1.2 Additional Information Sources	7
1.3 Model Numbering Convention	7
1.4 Serial Number	9
1.5 Notational Conventions	9
1.5.1 Values	9
1.5.2 Ranges	9
1.5.3 Register Notation and Usage	9
1.5.4 Bit Notation and Byte Values	9
1.6 Common Acronyms and Abbreviations	10
Chap_2_System_Overview_final.pdf	17
System Overview	17
2.1 Introduction	17
2.2 Features	18
2.3 Mechanical Design	20
2.3.1 Cabinet Layouts	21
2.3.2 Chassis Layouts	26
2.3.3 Board Layouts	30
2.4 System Architecture	33
2.4.1 Intel Processor Support	35
2.4.2 Chipset	36
2.4.3 Support Components	37
2.4.4 System Memory	37
2.4.5 Mass Storage	38
2.4.6 Serial and Parallel Interfaces	38
2.4.7 Universal Serial Bus Interface	38
2.4.8 Network Interface Controller	38
2.4.9 Graphics Subsystem	39
2.4.10 Audio Subsystem	39
2.5 Specifications	40
Chap_3_Processor_final_review.pdf	45
Processor/Memory Subsystem	45
3.1 Introduction	45
3.2 Intel Pentium Processors	46
3.2.1 Intel Processor Overview	46
3.2.2 Processor Upgrading	48
3.3 Memory Subsystem	48
Chap_4_System_Support_final_review.pdf	53
System Support	53
4.1 Introduction	53
4.2 PCI Bus Overview	53
4.2.1 PCI 2.3 Bus Operation	54
4.2.2 PCI Express Bus Operation	58
4.2.3 Option ROM Mapping	60
4.2.4 PCI Interrupts	60
4.2.5 PCI Power Management Support	60
4.2.6 PCI Connectors	61
4.3 System Resources	63
4.3.1 Interrupts	63
4.3.2 Direct Memory Access	68
4.4 Real-Time Clock and Configuration Memory	71
4.4.1 Clearing CMOS	71
4.4.2 Standard CMOS Locations	72
4.5 System Management	72
4.5.1 Security Functions	72
4.5.2 Power Management	74
4.5.3 System Status	75
4.5.4 Thermal Sensing and Cooling	75
4.6 Register Map and Miscellaneous Functions	76
4.6.1 System I/O Map	76
4.6.2 SCH5317 I/O Controller Functions	77
Chap_5_Input-Output_Interfaces_final_review.pdf	79
Input/Output Interfaces	79
5.1 Introduction	79
5.2 SATA Interfaces	79
5.2.1 SATA Programming	79
5.2.2 SATA Connector	81
5.2.3 RAID Functionality	81
5.3 Diskette Drive Interface	82
5.3.1 Diskette Drive Programming	82
5.3.2 Diskette Drive Connector	86
5.4 Serial Interface	87
5.4.1 Serial Connector	87
5.4.2 Serial Interface Programming	87
5.5 Parallel Interface	89
5.5.1 Standard Parallel Port Mode	89
5.5.2 Enhanced Parallel Port Mode	89
5.5.3 Extended Capabilities Port Mode	90
5.5.4 Parallel Interface Programming	90
5.5.5 Parallel Interface Connector	92
5.6 Keyboard/Pointing Device Interface	93
5.6.1 Keyboard Interface Operation	93
5.6.2 Pointing Device Interface Operation	95
5.6.3 Keyboard/Pointing Device Interface Programming	95
5.6.4 Keyboard/Pointing Device Interface Connector	99
5.7 Universal Serial Bus Interface	100
5.7.1 USB Data Formats	101
5.7.2 USB Programming	102
5.7.3 USB Connector	103
5.7.4 USB Cable Data	104
5.8 Audio Subsystem	105
5.8.1 HD Audio Controller	106
5.8.2 HD Audio Interface	106
5.8.3 HD Audio Codec	107
5.8.4 Audio Programming	108
5.8.5 Audio Specifications	110
5.9 Network Interface Controller	111
5.9.1 Wake-On-LAN Support	112
5.9.2 Alert Standard Format Support	112
5.9.3 Power Management Support	112
5.9.4 NIC Programming	113
5.9.5 NIC Connector	113
5.9.6 NIC Specifications	114
Chap_6_Integrated_Graphics_final_review.pdf	115
Integrated Graphics Subsystem	115
6.1 Introduction	115
6.2 Functional Description	116
6.3 Display Modes	118
6.4 Upgrading Graphics	119
6.5 VGA Monitor Connector	120
Chap_7_Power_and_Signal_final_review.pdf	121
Power and Signal Distribution	121
7.1 Introduction	121
7.2 Power Supply Assembly/Control	121
7.2.1 Power Supply Assembly	122
7.2.2 Power Control	124
7.2.3 Power Management	127
7.3 Power Distribution	128
7.4 Signal Distribution	131
Chap_8_BIOS_ROM_final_review.pdf	135
BIOS ROM	135
8.1 Introduction	135
8.2 ROM Flashing	136
8.2.1 Upgrading	136
8.2.2 Changeable Splash Screen	137
8.3 Boot Functions	137
8.3.1 Boot Device Order	137
8.3.2 Network Boot (F12) Support	138
8.3.3 Memory Detection and Configuration	138
8.3.4 Boot Error Codes	139
8.4 Setup Utility	140
8.5 Client Management Functions	149
8.5.1 System ID and ROM Type	150
8.5.2 Temperature Status	150
8.5.3 Drive Fault Prediction	150
8.6 SMBIOS	151
8.7 USB Legacy Support	151
App_A_Error_Messages__amp__Codes_final_review.pdf	153
A.1 Introduction	153
A.2 Beep/Power LED Codes	153
A.3 Power-On Self Test (POST) Messages	154
A.4 System Error Messages (1xx-xx)	157
A.5 Memory Error Messages (2xx-xx)	158
A.6 Keyboard Error Messages (30x-xx)	159
A.7 Printer Error Messages (4xx-xx)	160
A.8 Video (Graphics) Error Messages (5xx-xx)	160
A.9 Diskette Drive Error Messages (6xx-xx)	161
A.10 Serial Interface Error Messages (11xx-xx)	162
A.11 Modem Communications Error Messages (12xx-xx)	163
A.12 System Status Error Messages (16xx-xx)	164
A.13 Hard Drive Error Messages (17xx-xx)	165
A.14 Hard Drive Error Messages (19xx-xx)	167
A.15 Video (Graphics) Error Messages (24xx-xx)	168
A.16 Audio Error Messages (3206-xx)	168
A.17 DVD/CD-ROM Error Messages (33xx-xx)	169
A.18 Network Interface Error Messages (60xx-xx)	169
A.19 SCSI Interface Error Messages (65xx-xx, 66xx-xx, 67xx-xx)	170
A.20 Pointing Device Interface Error Messages (8601-xx)	171
App_B_ASCII_Character_Set_final_review.pdf	173
B.1 Introduction	173
App_C_Keyboard_final_review.pdf	177
C.1 Introduction	177
C.2 Keystroke Processing	177
C.2.1 PS/2-Type Keyboard Transmissions	179
C.2.2 USB-Type Keyboard Transmissions	180
C.2.3 Keyboard Layouts	180
C.2.4 Keys	183
C.2.5 Keyboard Commands	186
C.2.6 Scan Codes	187
C.3 Connectors	193

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Technical Reference Guide

www.hp.com

7-5

Power and Signal Distribution

Power LED Indications

A dual-color LED located on the front panel (bezel) is used to indicate system power status. The

front panel (bezel) power LED provides a visual indication of key system conditions listed as

follows:

NOTE:

[1] Will be accompanied by the same number of beeps, with 2-second pause between cycles. Beeps

stop after 5 cycles.

Wake Up Events

The PS On signal can be activated with a power “wake-up” of the system due to the occurrence

of a magic packet, serial port ring, or PCI power management event (PME). These events can be

individually enabled through the Setup utility to wake up the system from a sleep (low power)

state.

✎

Wake-up functionality requires that certain circuits receive auxiliary power while the system is

turned off.

The system unit must be plugged into a live AC outlet for wake up events to function.

Using an AC power strip to control system unit power will disable wake-up event functionality.

Power LED

Condition

Steady green

Normal full-on operation

Blinks green @ 0.5 Hz

Suspend state (S1) or suspend to RAM (S3)

Blinks red 2 times @ 1 Hz [1]

Processor thermal shut down. Check air flow, fan

operation, and CPU heat sink.

Blinks red 3 times @ 1 Hz [1]

Processor not installed. Install or reseat CPU.

Bli

nks red 4 times @ 1 Hz [1]

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 [1]

Pre-video memory error. Incompatible or incorrectly seated

DIMM.

Blinks red 6 times @ 1 Hz [1]

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 [1]

PCA failure. Check/replace system board.

Blinks red 8 times @ 1 Hz [1]

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

replace system board.

Blinks red 9 times @ 1 Hz [1]

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

CPU, system board.

Blinks red 10 times @ 1 Hz [1]

Bad option card.

No light

System dead. Press and hold power button for

less

than 4

seconds. If HD LED turns green then check voltage select

switch setting or expansion cards. If no LED light then check

power button/power supply cables to system board or

system board.