pull the power from box, hold in the on/off button, then power up, keep button held in until 0000 displays on front of box then let go then press these buttons in sequence, left arrow, down arrow, right arrow, up arrow, (on display it should say 4321) then press services button and then just leave it to boot up.
and next time u need something as sooooo simple as that, do some reading and research, u never know what else u might learn along the way.