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System Board Connectors and Jumpers

J20-22

PCI slots

P21

Secondary IDE connector

J30

PCI Extension socket

P24

USB header

J40

AGP/AIMM connector

P29

SCSI LED connector

P1

Power supply connector

P49

Password jumper (Installed = Enabled, 
Removed = Cleared)

P5 

Power button, Power LED, and HD LED 
connector

P70

CPU fan connector

P6

Speaker connector

P124

Hood lock solenoid connector

P7

CD-ROM audio connector

P125

Hood intrusion sensor

P8

Chassis fan connector

SW50

Clear CMOS button

P10

Diskette drive connector

XBT2

Battery

P11

Aux audio connector

XMM1-3

Memory sockets

P20

Primary IDE connector

XU1

Processor socket

System Hardware Interrupts 

IRQ

System Function

IRQ

System Function

0

Timer Interrupt 

8

Real-Time Clock 

1

Keyboard

9

Available for PCI

2

Interrupt Controller Cascade

10

Available for PCI

3

Serial Port (COM B)

11

Available for PCI

4

Serial Port (COM A)

12

Mouse

5

Audio

13

Coprocessor 

6

Diskette Drive

14

Primary ATA (IDE) controller

7

Parallel Port (LPT 1)

15

Secondary ATA (IDE) controller

Computer Diagnostic LEDs (on front of computer)

LED

Color

LED Activity

State/Message

Power

Green

On

(S0) Computer on

Power

Green

1 blink every 1 second

(S1) Normal Suspend Mode

Power

Green

1 blink every 2 seconds

(S3) Suspend to RAM

Power

Green

1 blink every 4 seconds

(S4) Suspend to Disk (if applicable)

Power

Clear

Off

(S5) Computer off

Power

Red

2 blinks 1 second apart, followed 
by 2-second pause - Repeat

CPU thermal shutdown

Power

Red

On

CPU not installed

Power

Red

1 blink every 1 second

ROM error

Power

Red

1 blink every 2 seconds

Power supply crow bar

Hard Drive

Green

Blinking

Hard drive activity

Keyboard Diagnostic LEDs 

LED

Color

LED Activity

State/Message

Num Lock

Green

Flashing (Beeps - 1S, 2L)

Memory error

Caps Lock

Green

Flashing (Beeps - 1L, 2S)

No video

Scroll Lock

Green

Flashing (Beeps - 2L, 1S)

System board failure, prior to video

Num, Caps, 
Scroll Lock

Green

Flash On-Off 2 times (Beeps - 
1L, 3S)

Invalid system ROM detected. ROM forces 
reflash.

Num, Caps, 
Scroll Lock

Green

On (Rising Tone)

ROM reflashed successfully

Num Lock

Green

On

ROMPaq diskette not present, is bad, or drive 
not ready.*

Caps Lock

Green

On

Enter password.

Num, Caps, 
Scroll Lock

Green

Blink On in sequence, one at a 
time - N, C, SL

Keyboard locked in network mode

* Insert valid ROMPaq diskette in drive A. Turn power switch off, then on to reflash ROM. If ROM flash is successful, all 
three keyboard LEDs will light up, and you will hear a rising tone series of beeps. Remove diskette and turn power off, 
then on to restart the computer. For more information about flashing the ROM, refer to the Troubleshooting guide.

System Board Diagnostic Lights

1

Main Power 
Switch Status

3.3 V_Aux LED

5 V_Aux/PSON LED

Power Button LED 

OFF

2

ON

ON

4

OFF

ON

3

ON

OFF

5

ON

1. ON and OFF state of LEDs apply only to a good, working system board with AC power applied to the power supply.
2. Power LED on front of computer is OFF.
3. Power LED on front of computer is ON (Green).
4. 5V_Aux is ON.
5. PSON is active = power supply is turned ON.

Clearing CMOS*

The computer's configuration (CMOS) may occasionally be corrupted. If it is, it is necessary to clear the CMOS 
memory using switch SW50.

To clear and reset the configuration, perform the following procedure:
1.

Prepare the computer for disassembly.

Ä

CAUTION: The power cord must be disconnected from the power source before pushing the Clear CMOS 
Button (NOTE: All LEDs on the board should be OFF). Failure to do so may damage the system board

2.

Remove the access panel.

3.

Press the CMOS button located on the system board and keep it depressed for 5 seconds.

4.

Replace the access panel.

5.

Turn the computer on and run F10 Computer Setup (setup-utility) to reconfigure the system.

*When the CMOS button is pushed or the jumper is removed, both the power-on password and the setup password 
become invalid because both are stored in the configuration memory. You will need to reset the passwords.

Disabling or Clearing the Power-On and Setup Passwords*

1.

Turn off the computer and any external devices, and disconnect the power cord from the power outlet.

2.

Remove the access panel.

3.

Locate the header and jumper labeled P49.

4.

Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to avoid losing it.

5.

Replace the access panel.

6.

Plug in the computer and turn on power. Allow the operating system to start. (Placing the jumper on pin 2 clears the 
current passwords and disables the password features.)

7.

To re-enable the password features, repeat steps 1-3, then replace the jumper on pins 1 and 2.

8.

Repeat steps 5-6, then establish new passwords.

Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.

*When the CMOS button is pushed or the jumper is removed, both the power-on password and the setup password 
become invalid because both are stored in the configuration memory. You will need to reset the passwords.

Computer Setup (F10) Utility Features (not all features may be available)

File

System Information
About
Set Time and date
Save to Diskette
Restore From Diskette
Set defaults and Exit
Ignore Changes and Exit
Save Changes and Exit

Storage

Device Configuration
Options
IDE DPS Self-Test
Controller Order
SCSI Narrow Termination
Boot Order

Security

Setup Password
Power-On Password
Password Options
Smart Cover
Smart Sensor
DriveLock
Master Boot Record Security
Save Master Boot Record
Restore Master Boot Record
Device Security
Network Service Boot
System IDs

Power

Energy Saver
Timeouts
Energy Saver Options

Advanced

Power-On Options
Onboard devices
PCI Devices
Bus Options
Devise Options
PCI VGA Configuration

Note: See Computer Setup (F10) Utility Guide on the Documentation Library CD.

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