Dell PowerEdge R905 - Manual (Page 174)

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Jumpers and Connectors
1 Turn off the system, including any attached peripherals, and disconnect
the system from the electrical outlet.
2 Open the system. See "Opening and Closing the System" on page 67.
3 Move the password jumper to pins 2-4 to clear the password.
See Figure 6-1 to locate the password jumper on the system board.
4 Close the system.
5 Reconnect your system and peripherals to their electrical outlets, and turn
on the system.
The existing passwords are not disabled (erased) until the system boots
with the password jumper plug removed. However, before you assign a new
system and/or setup password, you must install the jumper plug.
NOTE:
If you assign a new system and/or setup password with the jumper
plug still removed, the system disables the new password(s) the next time it
boots.
6 Turn off the system, including any attached peripherals, and disconnect
the system from the electrical outlet.
7 Open the system. See "Opening and Closing the System" on page 67.
8 Move the password jumper to pins 4-6 to restore the password function.
9 Close the system.
10 Reconnect your system and peripherals to their electrical outlets, and turn
on the system.
11 Assign a new system and/or setup password.
To assign a new password using the System Setup program, see "Assigning
a System Password" on page 57.
System Board Connectors
See Figure 6-1 and Table 6-2 for the location and description of the system
board connectors.