Estudio 2500AC Can't access service mode

[Rusty.Harris]

Sometimes I've seen machines that have been incorrectly cloned, from one type to another time
mess up the service password.
You might also try NO password when the box comes up. Sometimes on the older machines it isn't
needed.
If you need to reset the password, check the 08 codes in the service manual which will set it back to
the default.

[Vincent128]

Also, with the initiatives to change the default password(s) from factory default to something else it may simply have been changed.

Have a look in the service and user management manuals for resetting the service password which I believe is an administrator user level function.