Epson 3865X Plus User Manual page 271

You should disable the existing password if you want to be able
to set a new password later without having to reset a jumper
again. See "Disabling an existing password," below, for
instructions.
If you disable the password function, you cannot set a new
password unless you perform the steps to disable the existing
password at that time. If you do not want to use a password
anymore, follow the instructions under "Disabling the password
function" below.
Disabling an existing password
If you do not know your power-on password and do not want to
set a new one, follow these steps to disable the existing
password:
1. Turn off the computer and follow the instructions under
"Changing the Jumper Settings" in Chapter 5 to disable the
password function by setting jumper J1 to position B.
2. Insert the Reference diskette in drive A and turn on the
computer. You do not see the key prompt.
3. When the Operation Menu appears, highlight Setup
and press
in Chapter 2 and follow the instructions as if you are going
to enter a new password. However, when you see the
password prompt, press
the existing password.
Make sure you save the password setting and that you
highlight
the Setup program.
4. Remove the Reference diskette, turn off the computer, and
follow the instructions under "Changing the Jumper
Settings" in Chapter 5 to enable the password function by
setting jumper J1 to position A.
D-10 Troubleshooting
Enter.
Then see "Setting the Power-on Password"
** EXIT AND SAVE **
Enter
immediately. This clears out
when you leave