Owners Manual

Jumpers and connectors
This topic provides specific information about the system jumpers. It also provides some basic information about jumpers and
switches and describes the connectors on the various boards in the system. Jumpers on the system board help to disable
system and setup passwords. You must know the connectors on the system board to install components and cables correctly.
Topics:
• System board jumper settings
• System board connectors
• Disabling a forgotten password
System board jumper settings
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that came with the product.
For information about resetting the password jumper to disable a password, see the Disabling A Forgotten Password section.
Table 26. System Board Jumper settings
Jumper Setting Description
PWRD_EN
(default)
The password feature is enabled (pins 1–2).
The password feature is disabled (pins 2–3).
NVRAM_CLR
(default)
The configuration settings are retained at system boot (pins 2–3).
The configuration settings are cleared at the next system boot.
(pins 1–2).
Related references
Disabling a forgotten password on page 121
8
Jumpers and connectors 119