Owners Manual

Jumpers and connectors

This topic provides specific information about the 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 the 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 on resetting the password jumper to disable a password, see the Disabling A Forgotten Password section.

Table 27. 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 130

128 Jumpers and connectors