System Board Components

Dell™ OptiPlex™ GX400 Service Manual

System-Board Labels

Connector or Component

Label

AGP
AGP connector

AUX_LED
Auxiliary hard-drive access light connector

BATTERY
Battery socket

CD_IN
CD audio input connector

CPU_POWER
Microprocessor power connector

DS1
Diagnostic lights

DSKT
Floppy-drive connector

FAN
Microprocessor fan connector

IDE1
Primary EIDE connector

IDE2
Secondary EIDE connector

KYBD
PS/2 keyboard connector

L_IN
Line-in connector

L_OUT
Line-out/speaker connector

MIC
Microphone connector

MICROPROCESSOR
Microprocessor with heat sink

MSE
PS/2 mouse connector

NIC
Network adapter connector

PANEL
Control-panel connector

PAR
Parallel port connector

PCIn
PCI expansion-card connector

POWER
Computer power connector

PSWD
Password jumper

RIMM_n
RIMM socket

RTCRST
Real-time clock reset jumper

SER
Serial port connectors

SPKR
Internal speaker

STANDBY_LED
Standby power light

STR
Suspend-to-RAM light

TAPI
Telephony connector

USB
Port 2 USB connectors (2)

USB2
Port 1 USB connectors (2)

VRM
VRM connector

Connector or Component	Label
AGP	AGP connector
AUX_LED	Auxiliary hard-drive access light connector
BATTERY	Battery socket
CD_IN	CD audio input connector
CPU_POWER	Microprocessor power connector
DS1	Diagnostic lights
DSKT	Floppy-drive connector
FAN	Microprocessor fan connector
IDE1	Primary EIDE connector
IDE2	Secondary EIDE connector
KYBD	PS/2 keyboard connector
L_IN	Line-in connector
L_OUT	Line-out/speaker connector
MIC	Microphone connector
MICROPROCESSOR	Microprocessor with heat sink
MSE	PS/2 mouse connector
NIC	Network adapter connector
PANEL	Control-panel connector
PAR	Parallel port connector
PCIn	PCI expansion-card connector
POWER	Computer power connector
PSWD	Password jumper
RIMM_n	RIMM socket
RTCRST	Real-time clock reset jumper
SER	Serial port connectors
SPKR	Internal speaker
STANDBY_LED	Standby power light
STR	Suspend-to-RAM light
TAPI	Telephony connector
USB	Port 2 USB connectors (2)
USB2	Port 1 USB connectors (2)
VRM	VRM connector

Jumpers

System Board Jumpers

NOTICE: Ensure that your computer is turned off before you change a jumper setting. Otherwise, damage to your computer or unpredictable results may occur.

To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.

The following table lists the system board jumpers and their settings.

System-Board Jumper Settings

Jumper

Setting

Description

PSWD
(default)
Password features are enabled.

Password features are disabled.

RTCRST

Real-time clock reset. Can be used for troubleshooting.

jumpered unjumpered

Jumper	Setting	Description
PSWD	(default)	Password features are enabled.
	Password features are disabled.
RTCRST		Real-time clock reset. Can be used for troubleshooting.
jumpered unjumpered

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