change root password on t5120

hi all, i have a problem with a sun server, since a while the root password has been lost and now that we need to give maintenance to the services hosted in it, we cant access it, i tried a method to change it by booting from cd but i cant direct the server to boot from the cd. (The server is on auto boot), i couldnt acces the ok prompt either by the break key method (i dont know if i did it right, i just know you're supposed to press break when the server starts the self-test), any help would be apreciated thx

model: t5120
os: solaris 10
using a wyse terminal via serial conection

#. will get you to the SC>
you can send a break from the SC>
command is "break"

a more cowboy way of doing it would be to pull the disk before you power on , the system wont find a boot device and drop to the OK, from there you set autoboot to false.

thanks for the response, i will try right away =)

you cant break to ok> if the system is doin a POST, be it for any servers