Chapter 4 System Support

4.7.2 POWER MANAGEMENT

This system provides baseline hardware support of ACPI- and APM-compliant firmware and software. Key power-consuming components (processor, chipset, I/O controller, and fan) can be placed into a reduced power mode either automatically or by user control. The system can then be brought back up (“wake-up”) by events defined by the ACPI specification. The ACPI wake-up events supported by this system are listed as follows:

ACPI Wake-Up Event

System Wakes From

Power Button

Suspend or soft-off

RTC Alarm

Suspend or soft-off

Wake On LAN (w/NIC)

Suspend or soft-off

PME

Suspend or soft-off

Serial Port Ring

Suspend or soft-off

USB

Suspend only

Keyboard

Suspend only

Mouse

Suspend only

4.7.3 SYSTEM STATUS

These systems provide a visual indication of system boot and ROM flash status through the keyboard LEDs and operational status using bi-colored power and hard drive activity LEDs as indicated in Tables 4-15 and 4-16 respectively.

NOTE: The LED indications listed in Table 4-15 are valid only for PS/2-type keyboards. A USB keyboard will not provide LED status for the listed events, although audible (beep) indications will occur.

Table 4-15.System Boot/ROM Flash Status LED Indications

Table 4-15.

System Boot/ROM Flash Status LED Indications

 

 

NUM Lock

CAPs Lock

Scroll Lock

 

Event

LED

LED

LED

 

System memory failure [1]

Blinking

Off

Off

 

 

Graphics controller failure [2]

Off

Blinking

Off

 

 

System failure prior to graphics cntlr. initialization [3]

Off

Off

Blinking

 

 

ROMPAQ diskette not present, faulty, or drive prob.

On

Off

Off

 

 

Password prompt

Off

On

Off

 

 

Invalid ROM detected - flash failed

Blinking [4]

Blinking [4]

Blinking [4]

 

 

Keyboard locked in network mode

Blinking [5]

Blinking [5]

Blinking [5]

 

 

Successful boot block ROM flash

On [6]

On [6]

On [6]

 

NOTES:

[1]Accompanied by 1 short, 2 long audio beeps

[2]Accompanied by 1 long, 2 short audio beeps

[3]Accompanied by 2 long, 1 short audio beeps

[4]All LEDs will blink in sync twice, accompanied by 1 long and three short audio beeps

[5]LEDs will blink in sequence (NUM Lock, then CAPs Lock, then Scroll Lock)

[6]Accompanied by rising audio tone.

4-28Compaq Evo and Workstation Personal Computers

Featuring the Intel Pentium 4 Processor

Second Edition – January 2003

Page 82
Image 82
Compaq W4000 manual Power Management, System Status, System Boot/ROM Flash Status LED Indications