Dell Precision 340 - Manual (Page 57)

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.
System-Board Jumper Settings
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PSWD Password jumper
RIMM_n Memory module socket
SERIALn Serial connectors (2)
SCSI Auxiliary hard-drive activity light connector
SPEAKER System board speaker
STANDBY_LED Standby power light
TELE Telephony (TAPI) connector
USB_LAN Network and Port 1 USB (2) connectors
NOTICE: Before changing a jumper setting, verify that the standby power light on the system board has turned off. Otherwise, damage to your
computer or unpredictable results may occur. To locate this light, see " System Board Components ."
Jumper Setting Description
PSWD (default) Password features are enabled.
Password features are disabled.
CLR CM
(pins 1 and 2)
Normal setting—pins 1 and 2 are jumpered.
(pins 2 and 3)
CLR CM setting—pins 2 and 3 are jumpered. See "Reset Corrupted BIOS Settings" in your User's Guide.
jumpered unjumpered
NOTE: The CLR CM settings are also located on the system board next to the AGP card clip tab.