Dell PowerEdge R940 EMC Installation and Service Manual - Page 168

System board jumper settings, Disabling forgotten password

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Table 54. Processor expansion module (PEM) connectors (continued) Item Connector Description 8 RM_UPI_C UPI cable connector "C" 9 RM_UPI_B UPI cable connector "B" 10 J_PEM_CLK PEM clock connector 11 RM_UPI_A UPI cable connector "A" 12 RM_UPI_D UPI cable connector "D" 13 J_IORR_PWR Right expansion card riser power connector 14 IO_RISER3 Riser 3 connector 15 CPU4 CPU4 processor heat sink module socket System board jumper settings For information on resetting the password jumper to disable a password, see the Disabling a forgotten password section. Table 55. System board jumper settings Jumper Setting PWRD_EN Description The BIOS password feature is enabled. NVRAM_CLR The BIOS password feature is disabled. iDRAC local access is unlocked at next AC power cycle. iDRAC password reset is enabled in F2 iDRAC settings menu. The BIOS configuration settings are retained at system boot. The BIOS configuration settings are cleared at system boot. Disabling forgotten password The software security features of the system include a system password and a setup password. The password jumper enables or disables password features 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 4 to pins 4 and 6. 4. Install the system cover. The existing passwords are not disabled (erased) until the system boots with the jumper on pins 4 and 6. However, before you assign a new system and/or setup password, you must move the jumper back to pins 2 and 4. NOTE: If you assign a new system and/or setup password with the jumper on pins 4 and 6, the system disables the new password(s) the next time it boots. 168 PowerEdge R940 Jumpers and connectors

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Table 54. Processor expansion module (PEM) connectors (continued)
Item
Connector
Description
8
RM_UPI_C
UPI cable connector "C"
9
RM_UPI_B
UPI cable connector "B"
10
J_PEM_CLK
PEM clock connector
11
RM_UPI_A
UPI cable connector "A"
12
RM_UPI_D
UPI cable connector "D"
13
J_IORR_PWR
Right expansion card riser power connector
14
IO_RISER3
Riser 3 connector
15
CPU4
CPU4 processor heat sink module socket
System board jumper settings
For information on resetting the password jumper to disable a password, see the
Disabling a forgotten password
section.
Table 55. System board jumper settings
Jumper
Setting
Description
PWRD_EN
The BIOS password feature is enabled.
The BIOS password feature is disabled. iDRAC local access is
unlocked at next AC power cycle. iDRAC password reset is enabled
in F2 iDRAC settings menu.
NVRAM_CLR
The BIOS configuration settings are retained at system boot.
The BIOS configuration settings are cleared at system boot.
Disabling forgotten password
The software security features of the system include a system password and a setup password. The password jumper enables or disables
password features 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 4 to pins 4 and 6.
4.
Install the system cover.
The existing passwords are not disabled (erased) until the system boots with the jumper on pins 4 and 6. However, before you assign
a new system and/or setup password, you must move the jumper back to pins 2 and 4.
NOTE:
If you assign a new system and/or setup password with the jumper on pins 4 and 6, the system disables the
new password(s) the next time it boots.
168
PowerEdge R940 Jumpers and connectors