Owners Manual

Table 42. System board connectors and jumpers (continued)
Item Connector Description
16 FAN4 Cooling fan 4 connector
17 PWR_CONN B(P2) CPU1 power connector
18 A8,A4,A7,A3 DIMMS for CPU1 channels 2&3
19 FAN3 Cooling fan 3 connector
20 FAN2 Cooling fan 2 connector
21 MINI PERC C-Stack Mini PERC C-Stack connector
22 BP_SIG Backplane signal connector
23 ODD_PWR Power for the optical drive
24 SYS_PWR_CONN(P1) 24-pin power connector
25 FP_USB Front USB connector
26 SATA_CDROM Optical drive SATA connector
27 PIB_CONN Power interface board signal connector
28 SATA_TBU Tape backup unit SATA connector
29 SW_RAID_B Internal SATA B connector
30 CTRL_PNL Control panel signal connector
31 SW_RAID_A Internal SATA A connector
32 INT_ USB3.0 Internal USB3 port
33 TPM_MODULE Trusted Platform Module connector
34 J_PSWD_NVRAM Clear password / NVRAM jumpers. See the System
board jumper settings section.
Related tasks
System board jumper settings on page 177
Disabling a forgotten password
The software security features of the system 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 4 and 6 to pins 2 and 4.
4. Install the system cover.
The existing passwords are not disabled (erased) until the system boots with the jumper on pins 2 and 4. However, before
you assign a new system and/or setup password, you must move the jumper back to pins 4 and 6.
Jumpers and connectors
179