HP Designjet T11 MFP Série Guide De Référence Rapide page 41

If many users will share the system, HP recommends that the password be changed
by the system administrator when the system is set up for the first time. To change
the password, follow these steps:
1. Press the Setup tab.
2. Press the Options button.
The Options dialog box appears.
3. Press the System button.
4. Press the Advanced button.
5. Press the Set/Change Password button.
6. Enter a new administrator password. You are prompted to confirm the new
password.
7. When you have finished, click the OK button.
The new password is effective immediately.
To disable password protection, follow the steps to change the password and reset
the password to the default: "hpinvent".
Set up a password 37