Owners Manual

Item Connector Description
13 FAN3 Cooling fan connector
14 NVRAM CLR NVRAM password jumper
15 FAN2 Cooling fan connector
16 J_TPM1 Trusted platform module connector
17 R_INTRUSION Intrusion switch connector
18 BP_SIG Backplane signal connector
19 SAS_LED PERC LED connector
20 HDD/ODD_PWR Hard drive/optical disk drive power connector
21 FP_USB Front panel USB connector
22 FAN1 Cooling fan connector
23 CTRL_PNL Control panel interface connector
24 BATTERY Battery connector
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).
Disabling a forgotten password
The system's software security features include a system password and a setup password. The password jumper enables these password
features or disables them and clears any password(s) currently in use.
Prerequisites
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 are shipped with your product.
Steps
1. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
2. Remove the system cover.
3. Move the jumper on the system board jumper from pins 2 and 3 to pins 1 and 2.
126
Jumpers and connectors