Dell PowerEdge M620 Owner's Manual page 152

When a system password is not assigned and the password jumper on the
system board is in the enabled position, System Password is Not Enabled and
Password Status is Unlocked. To assign a system password:
1 Verify that Password Status is Unlocked.
2 Highlight the System Password option and press <Enter>.
3 Type your new system password.
You can use up to 32 characters in your password.
As you type, placeholders appear in the field.
The password assignment is not case-sensitive. Certain key combinations
are invalid and if you enter one, the system beeps. To erase a character,
press <Backspace> or the left-arrow key.
NOTE:
<Enter> to move to another field, or press <Esc> prior to completing step 5.
4 Press <Enter>.
5 To confirm your password, type it a second time and press <Enter>.
System Password changes to Enabled. Exit the System Setup program and
begin using your system.
6 Either reboot the system now for the password protection to take effect or
continue working.
NOTE:
Using Your System Password to Secure Your System
NOTE:
If you have assigned a setup password (see "Using the Setup Password" on
page 153), the system accepts your setup password as an alternate system
password.
When Password Status is Unlocked, you have the option to leave the
password security enabled or to disable password security.
To leave the password security enabled:
1 Turn on or reboot your system by pressing <Ctrl><Alt><Del>.
2 Type your password and press <Enter>.
152
Using the System Setup Program and UEFI Boot Manager
To escape from the field without assigning a system password, press
Password protection does not take effect until the system reboots.