Dell OptiPlex GX400 - Manual (Page 43)

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