Dell EMC PowerEdge MX840c, Installation And Service Manual, Page: 127 / 144

Table 16. 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 sled include a system password and a setup password. The password jumper enables or disables
password features and clears any password(s) currently in use.
Prerequisite
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 Remove the sled from the enclosure .
2 Remove the sled cover .
3 Remove the PEM .
4 Remove the drive cage .
5 Move the jumper on the system board jumper from pins 2 and 4 to pins 4 and 6.
6 Install the drive cage .
7 Install the PEM .
8 Install the sled 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.
9 Install the sled into the enclosure .
10 Remove the sled from the enclosure .
11 Remove the sled cover .
12 Remove the PEM .
13 Remove the drive cage .
14 Move the jumper on the system board jumper from pins 4 and 6 to pins 2 and 4.
15
Install the drive cage .
16 Install the PEM .
17 Install the sled cover .
18 Install the sled into the enclosure .
19 Assign a new system and/or setup password.
Jumpers and connectors 127