I think is the same in all Avov's I would go one by one on the channel listings pressing the yellow button and placing the password and I would see the lock disappeared on the channel list!!
It doesn't matter. It is a lot of futile work removing the locks on the AVOV TV Online and Online +. As soon as you turn the box off and back on again the locks will be back. So far there is no way to permanently remove the locks.
that is correct it locks back after restart!!!